CN114291663A - A rewinding and unwinding mechanism - Google Patents

Abstract

The invention discloses a rewinding and unwinding mechanism. The rewinding and unwinding mechanism of the present invention includes a bracket, a winding assembly, and a reel positioning support assembly; the winding assembly and the reel positioning support assembly are both arranged on the bracket, and the winding assembly and the reel are positioned The position of the support assembly on the bracket is adjustable along the axial direction of the unwinding and rewinding rolls. During the loading and unloading of the coil, the reel positioning support assembly serves as an auxiliary mechanism for the loading and unloading operation, which can meet the requirements of manual loading and unloading or automatic loading and unloading. The speed of loading and unloading, and it is convenient for the reel clamp in the winding assembly to accurately clamp or release the precise positioning of the reel, improve production efficiency, improve the stability and uniformity of coil material retraction, and ensure the quality of the coil material. Moreover, the rewinding and unwinding mechanism of the present invention has wide applicability to rewinding and unwinding of material rolls with different widths.

Description

A rewinding and unwinding mechanism

technical field

The invention relates to the technical field of coil material rewinding and unwinding equipment, in particular to a rewinding and unwinding mechanism.

Background technique

In the production of lithium battery pole pieces or plastic films, since the produced pole pieces or films are transported and stored in the form of rolls, the corresponding rolls will be reeled and unrolled. During the rewinding and unwinding process of the coil, the reel that has completed the positioning can be reeled or unwound during the rotation process.

Among them, in the process of winding and unwinding of the existing lithium battery pole pieces, the roll material that has been rolled or the roll material to be unrolled is manually unloaded or loaded. In the process of loading and unloading the coil of lithium battery pole pieces, it basically relies on manual support for the material roll. Because the lithium battery pole piece has a large weight, it not only makes the manual loading and unloading speed slow, labor intensity is high, and work efficiency is low. Conducive to large-scale industrial production. Moreover, in the process of loading and unloading, when the positioning of the reel is carried out, the positioning accuracy of the manually lifted and unloaded material and the reel is poor, which will affect the quality of the winding and unwinding, especially the winding, which is prone to the phenomenon of deviation, which makes the roll flat. The degree of reduction is reduced, which affects the quality of the coil. When unloading, the clamping mechanisms at both ends of the reel are released successively, and the clamping mechanism pulls one end of the reel away from the reel to generate frictional force on the inner wall of the reel.

SUMMARY OF THE INVENTION

In order to solve the problems of poor reel alignment accuracy, low loading and unloading efficiency in the existing rewinding and unwinding equipment, which affects the quality of the coiled material, and easy unwinding during unloading, the present invention provides a rewinding and unwinding mechanism.

The purpose of the present invention is achieved through the following technical solutions.

A rewinding and unwinding mechanism includes a bracket, a winding assembly and a reel positioning support assembly; the winding assembly and the reel positioning support assembly are both arranged on the bracket, and the winding assembly and the reel are positioned The position of the support assembly on the bracket is adjustable along the axial direction of the reel;

The winding assembly includes a reel clamp and a rotary driving member; the rotary driving member is drivingly connected with the reel clamp, and can drive the reel clamp to rotate;

The reel positioning support assembly includes a support bracket and a lift drive member; the lift drive member is drive-connected with the support bracket, and can drive the support bracket to rise and fall; the support bracket is arranged in the direction of the reel fixture to be retracted side of the roll.

In a preferred embodiment, both the rotary drive member and the reel clamp are arranged on a first support arm; a slide rail is arranged on the bracket, and the first support arm is slidably arranged on the slide rail; When sliding along the sliding rail, the position of the first support arm on the bracket can be adjusted along the axial direction of the winding and unwinding roll.

In a more preferred embodiment, a moving driving member is provided on the bracket; the moving driving member is drivingly connected with the first support arm, and can drive the first support arm to slide along the slide rail.

In a further preferred embodiment, the moving driving member includes an air cylinder or a lead screw module; the lead screw module includes a lead screw, and a motor that is drivingly connected to the lead screw.

In a preferred embodiment, the top of the support bracket has a first positioning support groove.

In a preferred embodiment, both the support bracket and the lift drive member are arranged on a second support arm; a slide rail is arranged on the bracket, and the second support arm is slidably arranged on the slide rail; When sliding along the slide rail, the position of the second support arm on the bracket can be adjusted along the axial direction of the rewinding and unwinding rolls.

In a more preferred embodiment, a guide rail is provided on the second support arm; the support bracket is slidably arranged on the guide rail, and can move up and down along the guide rail.

In a further preferred embodiment, the lift driving member is connected to the support bracket through an eccentric shaft in a transmission; a limit slot is provided on the support bracket, and a support slider is movably arranged in the limit slot. The support slider can move in the horizontal direction in the limit groove, one end of the eccentric shaft is movably assembled with the support slider, and the other end of the eccentric shaft is movably assembled on the bearing seat and is connected with the lift drive Parts drive connection.

In a further preferred embodiment, the output end of the lift driving member is hinged with the eccentric shaft through a transmission link.

In a further preferred embodiment, the eccentric shaft includes a main shaft and an eccentric body; the eccentric body is movably assembled on the support slider; the main shaft is movably assembled on the bearing seat.

In a more preferred embodiment, the second support arm has a second positioning support groove, and the second positioning support groove is provided with a clamping block.

In a more preferred embodiment, a side plate is provided on the bracket; the second support arm is connected to the side plate through a positioning support shaft, and the length of the positioning support shaft is adjustable.

In a preferred embodiment, in the rewinding and unwinding mechanism described in any one of the above, the winding assemblies include two groups, and the two groups of winding assemblies are arranged opposite to each other; the reel positioning and support assemblies include two groups, and the two groups of The reel positioning and supporting assemblies are arranged opposite to each other, and are located between the two sets of the reel assemblies that are oppositely arranged.

In a more preferred embodiment, the bracket includes a first side and a second side, and both the first side and the second side of the bracket are provided with the winding assembly and the reel positioning support assembly.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

In the rewinding and unwinding mechanism of the present invention, a winding assembly and a reel positioning support assembly are provided. When loading and unloading the roll, the reel positioning support assembly can support the unloaded material roll, which can meet the requirements of manual loading and unloading or AVG automatic loading and unloading. Loading and unloading, in order to improve the loading and unloading speed of the coil, and improve the production efficiency. When feeding, the reel positioning support assembly can accurately align the material roll, ensure that the winding assembly can smoothly clamp the reel, ensure the positioning accuracy of the reel, improve the stability and uniformity of the coil material retraction and unwind, and then ensure the coil material the quality of. When unloading, the reel positioning support assembly can support the material roll, which is convenient for the winding assembly to be smoothly pulled away from the state of clamping the reel. As a result, it is convenient for the reel clamp in the winding assembly to accurately clamp or release the precise positioning of the reel, thereby improving the stability and uniformity of coil material retraction and unwinding, enhancing the safety of loading and unloading operations, and reducing unwinding. The probability of occurrence is guaranteed, the quality of the coil material is guaranteed, and the cost loss caused by the unwinding is reduced.

In addition, the positions of the provided winding assembly and the reel positioning support assembly in the width direction of the coil material can be moved and adjusted, so that the coils of different widths and sizes can be easily retracted and unrolled, and the adaptability is wide, expanding the use of the retracting and unwinding mechanism. scope.

Description of drawings

FIG. 1 is a schematic diagram of the shaft side structure in the first direction of the rewinding and unwinding mechanism of the present invention in a specific embodiment;

2 is a schematic diagram of the shaft side structure of the rewinding and unwinding mechanism of the present invention in the second direction in a specific embodiment;

3 is a schematic diagram of the installation structure of the winding assembly on the bracket;

4 is a schematic diagram of the overall structure of the reel positioning support assembly;

5 is a schematic diagram of a partial assembly structure of a reel positioning support assembly;

Fig. 6 is the structural representation of eccentric shaft;

Fig. 7 is the structural schematic diagram of the support bracket in the retracted state;

Fig. 8 is the structural schematic diagram of the support bracket in the ejected state;

Reference numerals: 1-bracket, 101-side plate, 102-slide rail, 2-winding assembly, 21-first support arm, 22-rotation drive member, 23-reel clamp, 3-reel positioning support assembly, 31 -Second support arm, 310-Second positioning support groove, 32-Lifting drive member, 33-Support bracket, 330-First positioning support groove, 331-Limiting groove, 34-Guide rail, 35-Eccentric shaft, 351- Main shaft, 352-eccentric body, 36-supporting slider, 37-transmission connecting rod, 38-bearing seat, 39-block, 4-moving driver, 41-screw module, 42-cylinder, 5-positioning support Shaft, 6-reel.

Detailed ways

The technical solutions of the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings, but the protection scope and embodiments of the present invention are not limited thereto. In the description of specific embodiments, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer" and the like indicate the orientation or The positional relationship is based on the orientation or positional relationship shown in the attached drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, and the terms "first", "second", etc., are for the convenience of distinction, only for the purpose of It is convenient to describe the present invention and simplify the description, rather than indicating or implying that the structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention, nor can it be construed as an indication or suggestion that a relative importance.

Unless otherwise expressly specified and limited, the terms "installation", "arrangement", "connection", "fixation" and other terms should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations. In addition, as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Please refer to FIG. 1 and FIG. 2 for the rewinding and unwinding mechanism of the present invention, which are schematic diagrams of the axial side structure of the rewinding and unwinding mechanism from the first direction and the second direction, respectively. The first direction and the second direction can be specifically: Front right direction and front left direction as shown.

The rewinding and unwinding mechanism is provided with a bracket 1 , the bracket 1 has a transverse beam running in the left-right direction, and side plates 101 are fixedly connected to the left and right ends of the transverse beam. In addition, a winding assembly 2 and a reel positioning support assembly 3 are provided on the bracket 1 . Wherein, the winding assembly 2 and the reel positioning support assembly 3 are both connected to the beam of the bracket 1, and the positions of the winding assembly 2 and the reel positioning support assembly 3 on the bracket 1 relative to the beam of the bracket 1 are along the axial direction of the unwinding roll. Both are adjustable, that is, adjustable in the left and right directions.

Specifically, in the preferred embodiment shown in FIG. 1 and FIG. 2 , the winding assemblies 2 include two groups, and the two groups of winding assemblies 2 are arranged opposite to the left and right ends of the bracket 1 . Between the winding components 2 is the winding and unwinding station. When rewinding and unwinding, the material roll 6 is located at the rewinding and unwinding station between the winding components 2, and the left and right ends of the reel of the material roll 6 are respectively clamped by two sets of winding components 2 and driven for winding. . Similarly, the reel positioning and supporting assemblies 3 include two groups, the two groups of reel positioning and supporting assemblies 3 are arranged opposite to left and right, and the two groups of reel positioning and supporting assemblies 3 are located between the two oppositely arranged two groups of winding assemblies 2, and the two groups of reel The positioning and supporting components 3 are in one-to-one correspondence with the two groups of winding components 2 , and the reel positioning and supporting components 3 are relatively located on the side of the winding component 2 that is close to the winding and unwinding station.

During the feeding process of the reel 6, the reel positioning and supporting assembly 3 can support and lift the end of the reel of the reel 6, so as to realize convenient and fast feeding, and make the reel of the reel 6 precisely aligned with the winding assembly 2, and the completion of After the alignment, the winding assembly 2 can move to the reel close to the material reel 6 and precisely clamp the reel. During the unloading process of the reel 6, the reel positioning support assembly 3 can first lift up and support the reeled reel 6, and then the winding assembly 2 can release the clamping of the reel of the reel 6 and release it. Move the reel away from the material roll 6, and then the reel positioning support assembly 3 can support the material roll 6 to prevent unwinding.

Moreover, the position of the winding assembly 2 and the reel positioning support assembly 3 on the bracket 1 relative to the beam of the bracket 1 can be adjusted along the axial direction of the winding and unwinding of the material roll, so that the winding and unwinding of the material roll 6 of different widths can be realized. Unwinding operation, widely used.

In a preferred embodiment, the winding assembly 2 includes a reel clamp 23 and a rotary drive member 22 . Wherein, the rotary drive member 22 is connected to the reel clamp 23 in a transmission and can drive the reel clamp 23 to rotate. During the rewinding and unwinding process, the reel 6 is clamped by the reel clamp 23, and then the rotary drive member 22 drives the reel clamp 23 to rotate, and drives the reel to rotate synchronously to realize the coil rewinding and unwinding. Optional but not limited, the reel clamp 23 is an inflatable chuck, and the inflatable chuck can penetrate into the reel end of the material roll 6 in an uninflated state, and then inflate the reel to expand and perform the operation on the reel of the material roll 6. clamped. In addition, the rotary drive member 22 is optional but not limited to a motor.

In another preferred embodiment, the reel positioning support assembly 3 includes a support bracket 33 and a lift drive member 32 . The lift driving member 32 is connected to the support bracket 33 in a driving manner, and can drive the support bracket 33 to rise and fall; and the support bracket 33 is disposed on the side of the reel clamp 23 close to the material roll 6 . When unwinding, the end of the reel of the material roll 6 is placed on the support bracket 33, and the lift drive member 32 drives the support bracket 33 to lift up, so that the material roll 6 can be supported and loaded in place and aligned with the winding assembly 2. When winding, the lift drive member 32 first drives the support bracket 33 to lift up and support the reel end of the material roll 6. After the winding assembly 2 is moved out, the lift drive member 32 drives the support bracket 33 to go down. When it is moved to the position, the unloading of the material roll 6 can be completed. Optionally but not limitedly, the lift driving member 32 is a motor or an air cylinder.

Further, there is a first positioning support groove 330 on the top of the support bracket 33 . The first positioning and supporting groove 330 can accommodate the reel of the material roll 6 to fit in, and prevent the reel of the material roll 6 from slipping therefrom. Optionally but not limitedly, the first positioning support groove 330 is a V-shaped groove.

Embodiment 2

This embodiment is the same as the first embodiment. Further, as shown in FIG. 3 , in the unwinding and retracting mechanism of this embodiment, the winding assembly 2 further includes a first support arm 21 , wherein the rotary drive member 22 and the reel clamp 23 are both disposed on the first support arm 21 Moreover, the first support arm 21 is connected to the beam of the bracket 1 , and can move and adjust the position relative to the beam of the bracket 1 to the left and right.

In the illustrated specific embodiment, the cross beam of the bracket 1 is provided with a slide rail 102 along the left and right directions, and the first support arm 21 is slidably provided on the slide rail 102 through a slider, and can move along the slide rail 102 Adjust the position left and right.

Optionally, the first support arm 21 is a V-shaped arm structure, the bracket 1 at least includes a beam arranged up and down, the sliding rails 102 are arranged on the beams arranged up and down, the reel clamp 23 and the rotary drive member 22 are both arranged on the upper and lower sides. The V-shaped bottom of the first support arm 21, wherein the reel clamp 23 is arranged on the side of the first support arm 21 close to the rewinding and unwinding station, and the rotary drive member 22 is arranged on the side of the first support arm 21 away from the rewinding and unwinding. One side of the station passes through the first support arm 21 and is connected to the reel clamp 23 for transmission. The V-shaped ends of the first support arm 21 are slidably arranged on the upper and lower slide rails 102 respectively, so as to realize stable sliding. .

Therefore, when the first support arm 21 slides along the slide rail 102 to adjust the position, the rotary drive member 22 and the reel clamp 23 disposed on the first support arm 21 can move synchronously with the first support arm 21, and further Realize the left and right adjustment of the position.

In a preferred embodiment, the bracket 1 is provided with a moving drive member 4 . The moving driving member 4 is connected with the first supporting arm 21 in a driving manner, and can drive the first supporting arm 21 to slide along the sliding rail 102 , so as to realize automatic movement and adjustment of the position of the winding assembly 2 .

Optionally, the moving driving member 4 includes but is not limited to a motor, an air cylinder or a lead screw module. In the specific embodiment shown in FIG. 1 and FIG. 2 , the winding assembly 2 on the right is driven by the correspondingly arranged lead screw module 41 to adjust the position. Please refer to FIG. 3 again, the lead screw module 41 includes a screw rod and a motor connected with the screw rod. The motor is installed on the bracket 1 and can drive the first support arm 21 to move along the slide rail 102 through the screw rod; The cylinder 42 of the cylinder 42 drives the position adjustment, the shell of the cylinder 42 is fixedly installed on the bracket 1, and the piston shaft of the cylinder 42 is connected with the first support arm 21, and can drive the first support arm 21 along the slide rail during the telescopic action 102 performs a sliding movement.

Embodiment 3

This embodiment is the same as the first embodiment or the second embodiment. Further, please refer to FIG. 1 and FIG. 2 again, in the rewinding and unwinding mechanism of this embodiment, the reel positioning support assembly 3 further includes a second support arm 31 . Moreover, the second support arm 31 is connected to the beam of the bracket 1 , and can be adjusted to move left and right relative to the beam of the bracket 1 .

In the illustrated embodiment, the cross beam of the bracket 1 is provided with a slide rail 102 along the left-right direction, and the second support arm 31 is slidably provided on the slide rail 102 through a slider, and can be slid along the slide rail. 102 moves to adjust the position left and right.

Optionally, the second support arm 31 is a V-shaped arm structure, the bracket 1 at least includes a beam arranged up and down, the sliding rail 102 is arranged on the beam arranged up and down, the support bracket 33 and the lift drive member 32 are both arranged At the bottom of the V-shape of the second support arm 31 , the two ends of the V-shape of the second support arm 31 are respectively slidably arranged on the upper and lower slide rails 102 , so that stable sliding can be achieved.

Further, since the winding assembly 2 and the reel positioning support assembly 3 are separated from each other, the second support arm 31 can share the slide rail 102 with the first support arm 21 in the second embodiment.

Therefore, when the second support arm 31 slides along the slide rail 102 to adjust the position, the support bracket 33 and the lift drive member 32 arranged on the second support arm 31 can move synchronously with the second support arm 31, thereby realizing Position left and right adjustment.

Embodiment 4

This embodiment is the same as the third embodiment. Further, as shown in FIG. 4 and FIG. 5 , in the retracting and unwinding mechanism of this embodiment, a guide rail 34 is provided on the second support arm 31 ; wherein, the support bracket 33 is slidably arranged on the guide rail 34 and can be Elevating and sliding movement is performed along the guide rail 34 . Optionally, the guide rails 34 include two left and right distributed guide rails and are linear guide rails, and the left and right ends of the support bracket 33 are slidably arranged on the two linear guide rails, so as to realize stable up and down movement.

Further, please refer to FIG. 4 and FIG. 5 again, the elevating driving member 32 is connected to the supporting bracket 33 in a driving manner through the eccentric shaft 35 .

In the illustrated embodiment, the second support arm 31 has opposite first and second sides, the first side being the side close to the take-up and unwinding station, and the second side being the opposite side away from the take-up and unwinding station. bit side. Wherein, the support bracket 33 is located on the first side of the second support arm 31, and a limit slot 331 is defined on the support bracket 33. A support slider 36 is movably arranged in the limit slot 331, and the support slider 36 can reach the limit. The position slot 331 moves in the horizontal direction, and the support slider 36 is engaged with the limit slot 331 in the vertical direction in the limit slot 331. When the support slider 36 moves up and down, the support bracket 33 is moved up and down. 6 , the eccentric shaft 35 includes a main shaft 351 and an eccentric body 352 integrally connected with the main shaft 351 . The eccentric body 352 is located at the first end of the eccentric shaft 35 , the support slider 36 has an assembly groove, and the eccentric body 352 The main shaft 351 of the eccentric shaft 35 passes through to the second side of the second support arm 31 and is movably assembled on the bearing seat 38, the bearing seat 38 A relatively fixed connection is maintained with the second support arm 31 through the base frame. In addition, the lift driving member 32 is mounted on the second side of the second support arm 31 , and the output end is hinged with the main shaft 351 of the eccentric shaft 35 through the transmission link 37 .

When the lifting driving member 32 is working, please refer to FIG. 7 and FIG. 8 , the eccentric shaft 35 can be driven to rotate through the transmission link 37 , and the eccentric body 352 of the eccentric shaft 35 drives the supporting slider 36 to do eccentric swing during the rotation process. The support slider 36 of the eccentric swing motion drives the support bracket 33 to swing under the limit of the limit groove 331 , and the support bracket 33 simultaneously converts the swing motion to the swing motion along the guide rail 34 under the restriction and cooperation of the guide rail 34 . Up and down linear sliding action is performed to achieve ejection or recovery. The support slider 36 moves horizontally in the limit groove 331 , and the ejected or recovered support bracket 33 can complete the retraction and support of the material roll 6 .

In addition, there is a second positioning support groove 310 on the second support arm 31 , the second positioning support groove 310 corresponds to the first positioning support groove 330 on the support bracket 33 , and can be optionally a V-shaped groove. Further, a clamping block 39 is provided on the second positioning support groove 310 , and the top of the clamping block 39 has a concave arc surface adapted to the reel of the material roll 6 . When the material roll 6 is retracted and unrolled, after the support bracket 33 is moved down and recovered, the reel of the material roll 6 can be temporarily supported on the clamping block 39 to facilitate further loading and unloading.

Embodiment 5

This embodiment is the same as the third or fourth embodiment. Further, referring to FIGS. 1 to 4 again, in the retracting and unwinding mechanism of this embodiment, the second support arm 31 is connected to the side plate 101 of the bracket 1 through the positioning support shaft 5 .

In a preferred embodiment, the two axial ends of the positioning support shaft 5 are a fixed end and a movable end respectively, the fixed end is fixedly connected with the side plate 101 of the bracket 1 , and the movable end of the positioning support shaft 5 is connected with the second support arm 31 Active connection and the connection position is adjustable in the axial direction. Specifically, optional, the movable end of the positioning support shaft 5 has a movable mounting seat, the movable end of the positioning support shaft 5 is telescopically installed in the movable mounting seat, and the movable mounting seat is assembled with the positioning support shaft 5 therein by using bolts. lock.

During assembly, the movable mounting seat is fixedly connected to the second support arm 31, and the movable end of the positioning support shaft 5 extends into the movable mounting seat. When the position of the second support arm 31 needs to be adjusted, loosen the bolts, And move the second support arm 31 along the slide rail 102 to make the positioning support shaft 5 telescopic in the movable mounting seat to adjust the length. After the adjustment is completed, the movable end of the positioning support shaft 5 is locked again with bolts, so as to realize the position adjustment of the second support arm 31 and ensure that the adjusted position of the second support arm 31 remains stable.

Further, the movable end of the positioning support shaft 5 is movably connected to the second support arm 31 , and the fixed end thereof can pass through the first support arm 21 and be connected to the side plate 101 , and the positioning support shaft 5 can connect the first support arm 21 to the side plate 101 . The position adjustment movement produces a guiding effect.

Embodiment 6

This embodiment is the same as any one of Embodiments 1 to 5. Further, please refer to FIG. 1 to FIG. 4 again, in the retracting and unwinding mechanism of this embodiment, the bracket 1 includes a first side and a second side, and the first side and the second side are specifically the front and rear sides of the bracket 1 . side. Moreover, both the first side and the second side of the bracket 1 are provided with a winding assembly 2 and a reel positioning support assembly 3. The arranged reels are positioned to support the assembly 3 .

Therefore, both the front and rear sides of the bracket 1 are provided with rewinding and unwinding stations, which can independently perform the rewinding and unwinding operations, and the two rewinding and unwinding stations can simultaneously perform the rewinding and unwinding of the rolls 6 of different sizes, effectively Increase productivity.

The above embodiments are only preferred embodiments of the present invention, and are only intended to further describe the technical solutions of the present invention in further detail, but the above descriptions are exemplary rather than exhaustive, and are not limited to the disclosed embodiments. The protection scope and embodiments of the present invention are not limited to this, and any changes, combinations, deletions, substitutions or modifications that do not depart from the spirit and principle of the present invention will be included in the protection scope of the present invention.

Claims (14)

1. A rewinding and unwinding mechanism, characterized in that it comprises a bracket, a winding assembly and a reel positioning and supporting assembly; the winding assembly and the reel positioning and supporting assembly are both arranged on the bracket, and the winding group is The position of the component and the reel positioning support assembly on the bracket can be adjusted along the axial direction of the winding and unwinding roll; The winding assembly includes a reel clamp and a rotary driving member; the rotary driving member is drivingly connected with the reel clamp, and can drive the reel clamp to rotate; The reel positioning support assembly includes a support bracket and a lift drive member; the lift drive member is drive-connected with the support bracket, and can drive the support bracket to rise and fall; the support bracket is arranged in the direction of the reel fixture to be retracted side of the roll. 2 . The rewinding and unwinding mechanism according to claim 1 , wherein the rotary drive member and the reel clamp are both arranged on the first support arm; a slide rail is arranged on the bracket, and the The first support arm is slidably arranged on the slide rail; when sliding along the slide rail, the position of the first support arm on the bracket can be adjusted along the axial direction of the winding and unwinding roll. 3 . The rewinding and unwinding mechanism according to claim 2 , wherein a moving driving member is provided on the bracket; the moving driving member is drivingly connected with the first support arm, and can drive the The first support arm slides along the slide rail. 4. A rewinding and unwinding mechanism according to claim 3, characterized in that, the moving driving part comprises a cylinder or a screw module; the screw module comprises a screw, and is transmitted with the screw connected motor. 5 . The rewinding and unwinding mechanism according to claim 1 , wherein the top of the support bracket has a first positioning support groove. 6 . 6 . The rewinding and unwinding mechanism according to claim 1 , wherein the support bracket and the lift driving member are both arranged on the second support arm; a slide rail is arranged on the bracket, and the The second support arm is slidably arranged on the slide rail; when sliding along the slide rail, the position of the second support arm on the bracket can be adjusted along the axial direction of the winding and unwinding roll. 7 . The rewinding and unwinding mechanism according to claim 6 , wherein a guide rail is arranged on the second support arm; the support bracket is slidably arranged on the guide rail and can be carried out along the guide rail. 8 . Lifting and sliding movement. 8 . The rewinding and unwinding mechanism according to claim 7 , wherein the lifting and lowering drive member is connected to the support bracket through an eccentric shaft; a limit slot is provided on the support bracket, and the limit A support slider is movably arranged in the slot, and the support slider can move in the horizontal direction in the limit slot. One end of the eccentric shaft is movably assembled with the support slider, and the other end of the eccentric shaft is movable It is assembled on the bearing seat and is drively connected with the lift driving part. 9 . The rewinding and unwinding mechanism according to claim 8 , wherein the output end of the lift driving member is hinged to the eccentric shaft through a transmission link. 10 . 10 . The rewinding and unwinding mechanism according to claim 8 , wherein the eccentric shaft comprises a main shaft and an eccentric body; the eccentric body is movably assembled on the support slider; the main shaft is movably assembled on the support slider 10 . on the bearing seat. 11 . The rewinding and unwinding mechanism according to claim 6 , wherein the second support arm has a second positioning support groove, and the second positioning support groove is provided with a clamping block. 12 . 12 . The rewinding and unwinding mechanism according to claim 6 , wherein a side plate is arranged on the bracket; the second support arm is connected to the side plate through a positioning support shaft, and the positioning support The length of the shaft is adjustable. 13. The rewinding and unwinding mechanism according to any one of claims 1 to 12, wherein the winding assembly comprises two groups, and the two groups of winding assemblies are arranged oppositely; the reel positioning support assembly comprises There are two groups, and the reel positioning and supporting assemblies of the two groups are arranged opposite to each other, and are located between the two groups of the reel assemblies arranged oppositely. 14. A rewinding and unwinding mechanism according to claim 13, wherein the bracket comprises a first side and a second side, and the first side and the second side of the bracket are provided with the roll A support assembly is positioned around the assembly and the reel.

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