Variable-breadth double-station winding device and winding method

Abstract

The invention discloses a variable-breadth double-station winding device which comprises a horizontally-arranged center large spacer, and the center large spacer is rotationally connected with an operation side support and a transmission side support. Linear guide rails are symmetrically installed on the two sides of the center large spacer, material shaft transverse adjusting devices which are oppositely arranged are installed on the linear guide rails, moving arms are installed on the side walls of the material shaft transverse adjusting devices, and the two moving arms are connected with a material shaft driving device. Material passing roller supports are fixedly connected to the top and the bottom of the center large spacer correspondingly, and material passing guide rollers are installed on the material passing roller supports correspondingly. The transverse material shaft adjusting device drives the material shaft driving device to move along the linear guide rail, the rolling width can be changed, and the rolling requirements of printing materials with different widths are met. The invention further discloses a variable-breadth double-station winding method, the purpose of changing the winding breadth is achieved by moving the material shaft driving device through the material shaft transverse adjusting device, and the purpose of disassembling the paper core is achieved by clamping the paper core through the material shaft driving device.

Description

Technical Field

[0001] The invention belongs to the technical field of wide decorative paper printing, and in particular relates to a double-station winding device with a variable width, and also relates to a double-station winding method with a variable width. Background Art

[0002] In today's decorative paper printing industry, wide-format decorative paper printing presses play a vital role. At present, the maximum width of printed materials of this type of printing press is limited to 7 feet, that is, 2250mm. In the actual production process, the business needs of printing plants are very diverse, and the equipment is often used to print materials with different widths from 4 feet (1250mm) to 7 feet (2250mm). This requires related supporting equipment, especially the winding device, to have a certain degree of flexibility and adaptability to meet the winding needs of printing materials with different widths.

[0003] The rolls of materials used in decorative paper printing machines generally use 3-inch paper cores. In the past, the traditional winding device mainly used a safety chuck plus an air expansion shaft to load and unload the rolls. This traditional structure exposed many problems during actual operation. First of all, the operation process of loading and unloading the rolls is relatively complicated, and at least two workers are required to work together to complete the entire operation process. This not only increases the investment in labor costs, but also in the process of manual cooperation, once there is a miscommunication or operational error, it may lead to low loading and unloading efficiency, and even cause safety accidents.

[0004] In addition, when using narrow paper rolls, the problem of the weight of the air shaft is particularly prominent. The weight of the air shaft will have a negative impact on the entire printing process, making it difficult to maintain a stable tension of the paper during the printing process, which in turn affects the printing quality of the product. The printed decorative paper may have problems such as blurred patterns and color deviations, which will reduce the market competitiveness of the product and cause economic losses to the printing plant. Therefore, developing a new winding device to solve these problems has become an important issue that needs to be solved in the decorative paper printing industry. Summary of the invention

[0005] The first purpose of the present invention is to provide a double-station winding device with variable width, which solves the technical problem of inconvenient loading and unloading of material rolls in the prior art.

[0006] The second object of the present invention is to provide a double-station winding method with variable width.

[0007] The first technical solution adopted by the present invention is a double-station winding device with variable width, including a horizontally arranged central large support, with an operating side bracket and a transmission side bracket respectively fixed at both ends of the central large support; linear guide rails are symmetrically installed on both sides of the central large support, and each linear guide rail is equipped with two relatively arranged material shaft lateral adjustment devices, and a movable arm is installed on the side of the material shaft lateral adjustment device away from the linear guide rail, and the two movable arms are connected to a material shaft driving device, and the paper core is installed between the two material shaft driving devices; a feed roller bracket is fixed on the top and bottom of the central large support, and a feed guide roller is installed on the feed roller bracket.

[0008] The first feature of the present invention is also: The central large support comprises a rectangular tube, both ends of which are fixed with shaft heads, which are rotatably connected to an operating side bracket and a transmission side bracket; the linear guide rail and the feeding roller bracket are both installed on the side wall of the rectangular tube.

[0009] The operating side bracket and the transmission side bracket are both equipped with bearing seats, spherical roller bearings are installed in the bearing seats, and the shaft heads at both ends of the rectangular tube are rotatably connected with the spherical roller bearings respectively.

[0010] A first reduction motor is installed on the transmission side bracket, a small gear is installed on the output end of the first reduction motor, a large gear is fixedly connected to the shaft head close to the transmission side bracket, and the small gear and the large gear are meshed with each other.

[0011] The material shaft lateral adjustment device includes a second reduction motor installed on the central large support, a fixed support and a support seat, the fixed support and the support seat are arranged opposite to each other, and a ball screw is rotatably connected inside the fixed support and the support seat, a nut is installed on the ball screw, and the nut moves along the linear guide rail; the output end of the second reduction motor and the end of the ball screw passing through the fixed support are connected to a synchronous pulley a, and the two synchronous pulleys a are connected by a synchronous belt a; the nut is connected to the movable arm.

[0012] The material shaft driving device includes a base body connected to the moving arm, on which a rotary driving device and a cylinder driving device are installed; the material shaft driving device also includes a sleeve and a telescopic shaft that are sleeved with each other, the rotary driving device drives the sleeve to rotate, and the cylinder driving device drives the telescopic shaft to move linearly; One end of the telescopic shaft is tapered, and a plurality of T-slots are evenly arranged on the tapered end of the telescopic shaft along the circumferential direction. A slider is slidably connected in the T-slot, and the slider is connected to a key through a fastener. A through slot is arranged on the shaft sleeve at a position corresponding to the T-slot, and the key moves linearly in the through slot to connect the paper core.

[0013] The rotary drive device comprises a third reduction motor mounted on the robot arm. The end of the transmission shaft of the third reduction motor and the outer periphery of the shaft sleeve are both sleeved with a synchronous pulley b, and the two synchronous pulleys b are connected by a synchronous belt b.

[0014] The cylinder driving device includes a cylinder arranged at the end of the telescopic shaft away from the paper core, a connecting nut is installed on the output shaft of the cylinder, a connecting sleeve is circumferentially sleeved on the connecting nut, a bearing is sleeved on the end of the telescopic shaft close to the cylinder, a bearing sleeve is sleeved on the outer ring of the bearing, the bearing sleeve and the connecting sleeve are connected by fasteners, and the connecting sleeve abuts against the outer ring of the bearing.

[0015] The outer shell of the cylinder is also connected to a sliding sleeve, the other end of the sliding sleeve is installed on the moving arm, the bearing sleeve and the connecting sleeve are installed on the inner wall of the sliding sleeve, a guide key is installed on the outer periphery of the bearing sleeve, a key slot is opened on the inner wall of the sliding sleeve, and the guide key is slidably connected in the key slot.

[0016] The second technical solution adopted by the present invention is a double-station winding method with variable width, which adopts the above-mentioned double-station winding device with variable width, and includes the following steps: S1: Move the two material shaft driving devices on the linear guide rail to the corresponding loading and unloading working positions through the material shaft lateral adjustment device; S2: Install the paper core on the conical end of the telescopic shaft of one of the material shaft driving devices, drive the telescopic shaft to move toward the paper core through the cylinder, and the expansion key passes through the shaft sleeve and clamps the inner wall of the paper core. Then, the telescopic shaft of the other material shaft driving device is controlled by the material shaft lateral adjustment device to penetrate the inner wall of the paper core, and the paper core is clamped according to the above steps; S3: The third reduction motor works, driving the shaft sleeve and the telescopic shaft to rotate synchronously, and further driving the paper core to rotate to complete the winding; S4: After the winding is completed, the third reduction motor stops working, the cylinder drives the telescopic shaft to move away from the paper core, and the expansion key falls from the U-shaped groove of the shaft sleeve, releasing the clamping force of the expansion key on the inner wall of the paper core; S5: Move one of the material shaft driving devices in a direction away from the paper core through the material shaft lateral adjustment device, remove the paper core, repeat S1-S4, and perform a winding operation on the next paper core.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention drives the material shaft driving device to move along the linear guide rail through the material shaft lateral adjustment device, which can realize the change of the winding width and meet the winding requirements of printing materials with different widths. In particular, in the common 4-foot to 7-foot material roll conversion of decorative paper printing machines, the relative position of the material shaft driving device on the operating side can be kept unchanged, and only the transmission side moves unilaterally, thereby improving the convenience of operation. The rotation driving device and the cylinder driving device in the material shaft driving device cooperate to realize the tightening and loosening of the paper core, and drive the paper core to rotate, which is convenient for the installation and removal of the paper core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1a It is a schematic structural diagram of a double-station winding device with variable width according to the present invention; Figure 1b yes Figure 1a Side view of Figure 2 It is a schematic structural diagram of the double-station winding device with variable width of the present invention at a 4-foot material working station; Figure 3 It is a schematic structural diagram of a material shaft transverse adjustment device in a double-station winding device with variable width according to the present invention; Figure 4 It is a structural schematic diagram of a material shaft driving device in a double-station winding device with variable width of the present invention; Figure 5 yes Figure 4 Side view of Figure 6 It is a schematic diagram of the connection structure of the telescopic shaft and the expansion key in the double-station winding device with variable width of the present invention; Figure 7 The invention is a schematic diagram of the connection structure of the cylinder and the telescopic shaft in the double-station winding device with variable width.

[0019] In the figure: 1. Material shaft drive device a, 2. Material guide roller, 3. Material roller bracket, 4. Material shaft drive device b, 5. Paper core, 6. Cutting roller, 7. First reduction motor, 8. Large gear, 9. Small gear, 10. Material shaft lateral adjustment device, 11. Moving arm, 12. Linear guide rail, 13. Center large support, 14. Bearing seat, 15. Bearing, 16. Operation side large bracket, 17. Transmission side large bracket, 18. Material roll, 19. The second reduction motor, 20. Synchronous pulley a, 21. Synchronous belt a, 22. Fixed support, 23. Ball screw, 24. Nut, 25. Support seat, 26. The third reduction motor, 27. Transmission shaft, 28. Synchronous pulley b, 29. Synchronous belt b, 30. Expanding key, 31. Slider, 32. Bushing, 33. Telescopic shaft, 34. Connecting seat, 35. Sliding sleeve, 36. Bearing sleeve, 37. Connecting sleeve, 38. Cylinder. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Example 1 like Figure 1a , Figure 1b and Figure 2As shown, the double-station winding device with variable width disclosed in this embodiment includes a horizontally arranged central large support 13, and the two ends of the central large support 13 are rotatably connected with an operating side bracket 16 and a transmission side bracket 17 respectively; linear guide rails 12 are symmetrically installed on both sides of the central large support 13, and each linear guide rail 12 is installed with two oppositely arranged material shaft lateral adjustment devices 10, and the material shaft lateral adjustment device 10 is installed with a movable arm 11 on the side away from the linear guide rail 12, and the two movable arms 11 are connected to a material shaft driving device, and the paper core 5 is installed between the two material shaft driving devices; the top and bottom of the central large support 13 are fixedly connected to a feed roller bracket 3, and the feed roller bracket 3 is installed with a feed guide roller 2.

[0022] Furthermore, the central large support 13 comprises a rectangular tube, both ends of which are fixed with shaft heads, which are rotatably connected to the operating side bracket 16 and the transmission side bracket 17; the linear guide rail 12 and the feed roller bracket 3 are both installed on the side wall of the rectangular tube.

[0023] In this embodiment, the central large support 13 is composed of a rectangular tube welded with two end shaft heads and corresponding mounting pads, and the two ends of the shaft heads are rotatably connected to the operating side bracket 16 and the transmission side bracket 17 respectively; two linear guide rails 12 are installed on the two wider sides of the central large support 13, and two material feed roller brackets 3 are installed on the two narrower sides of the central large support 13. The wider surface and the narrower surface are perpendicular to each other to ensure the accuracy requirements of the double-station winding device. The material shaft drive device is driven to move along the guide rail 12 through the material shaft lateral adjustment device 10 to achieve the function of variable width; in this embodiment, the material shaft drive device includes a material shaft drive device a1 and a material shaft drive device b4.

[0024] Since the decorative paper printing machine is usually printed close to the operating side, during the conversion process of the 4-foot to 7-foot material roll 18, the relative position of the material shaft drive device on the operating side is generally kept unchanged, and only the material shaft drive device on the transmission side is moved unilaterally. According to actual work needs, safety protection devices are provided at the front and rear extreme positions of the lateral movement of the material shaft to ensure that the material shaft can work within a safe range. Figure 5 As shown, in actual application, in order to ensure that the cutting roller 6 can press the paper core 5 to perform cutting after the width is changed, the front end of the movable arm 11 needs to be processed into a plane. The distance between this plane and the center of the paper core 5 must be smaller than the radius of the paper core 5, and the safety distance for the action of the cutting roller 6 must be deducted.

[0025] Example 2 On the basis of Example 1, a bearing seat 15 is installed on both the operating side bracket 16 and the transmission side bracket 17, a spherical roller bearing 14 is installed in the bearing seat 15, and the shaft heads at both ends of the rectangular tube are rotatably connected to the spherical roller bearing 14 respectively.

[0026] In this embodiment, the spherical roller bearing 14 has an automatic self-aligning performance and can withstand both radial loads and bidirectional axial loads; Example 3 On the basis of Example 1, a first reduction motor 7 is installed on the transmission side bracket 17, a pinion 9 is installed on the output end of the first reduction motor 7, a large gear 8 is fixed to the shaft head close to the transmission side bracket 17, and the pinion 9 and the large gear 8 are meshed with each other.

[0027] In this embodiment, the small gear 9 is driven to rotate by the first reduction motor 7 to further drive the large gear 8 to rotate, thereby realizing the rotation of the central large support 13. The first reduction motor 7 is equipped with a brake to ensure that the double-station winding device can operate in a safe and orderly cycle.

[0028] Example 4 like Figure 3 As shown, on the basis of Example 1, the material shaft lateral adjustment device 10 includes a second reduction motor 19 installed on the central large support 13, a fixed support 22 and a support seat 25, the fixed support 22 and the support seat 25 are arranged opposite to each other, and a ball screw 23 is rotatably connected inside the fixed support 22 and the support seat 25, a nut 24 is installed on the ball screw 23, and the nut 24 moves along the linear guide 12; the output end of the second reduction motor 19 and the end of the ball screw 23 passing through the fixed support 22 are both connected with a synchronous pulley a20, and the two synchronous pulleys a20 are connected by a synchronous belt a21; the nut 24 is connected to the movable arm 11.

[0029] In this embodiment, the second reduction motor 19 is installed at both ends of the narrower surface of the central large support 13, the second reduction motor 19 shaft end is installed with a synchronous pulley a20, the fixed support 22 is installed at both ends of the wider surface of the central large support 13, the nut 24 carried by the ball screw 23 is installed on the side of the movable arm 11, the shaft head of one end of the ball screw 23 is installed in the fixed support 22, and the shaft head of the other end of the ball screw 23 is installed in the support seat 25, the shaft head of the ball screw 23 and the synchronous pulley a20 installed on the shaft end of the second reduction motor 19 are connected by a synchronous belt a21, and the material shaft drive device a1 and the material shaft drive device b4 can be controlled to move independently on one side or move together on both sides, thereby realizing the loading and unloading of the material roll of the double-station winding device, and at the same time meeting the requirements of the width change of the printing material. Specifically, the second reduction motor 19 rotates to drive the ball screw 23 to rotate, and the nut 24 moves linearly along the linear guide 12, driving the movable arm 11 to move along the axis of the ball screw 23.

[0030] Example 5 like Figure 6As shown, on the basis of Example 1, the material shaft driving device includes a base connected to the moving arm 11, and a rotation driving device and a cylinder driving device are installed on the base; the material shaft driving device also includes a sleeve 32 and a telescopic shaft 33 that are sleeved with each other, the rotation driving device drives the sleeve 32 to rotate, and the cylinder driving device drives the telescopic shaft 33 to move linearly; One end of the telescopic shaft 33 is tapered, and a plurality of T-slots are evenly arranged on the tapered end of the telescopic shaft 33 along the circumferential direction. A slider 31 is slidably connected in the T-slot, and the slider 31 is connected to the expansion key 30 through a fastener; a through groove is arranged on the shaft sleeve 32 at a position corresponding to the position of the T-slot, and the expansion key 30 moves linearly in the through groove to connect the paper core 5.

[0031] In this embodiment, the slider 31 is a T-shaped structure. The slider 31 and the expansion key 30 are connected as a whole by screws and embedded in the five T-slots at the front end of the telescopic shaft 33. The T-slots are evenly distributed in the circumferential direction to ensure that the paper core 5 is evenly stressed after the expansion key 30 is expanded. The five U-shaped slots at the front end of the sleeve 32 correspond to the T-slots one by one. The expansion key 30 is embedded in the telescopic shaft 33 through the T-slots. The five T-slots at the front end of the telescopic shaft 33 have certain slope requirements to ensure that the expansion key 30 can be expanded and dropped back during the expansion and contraction process.

[0032] Example 6 like Figure 4 As shown, based on Example 5, the rotation drive device includes a third reduction motor 26 installed on the robot arm 11, and the end of the transmission shaft 27 of the third reduction motor 26 and the outer periphery of the sleeve 32 are both sleeved with a synchronous pulley b28, and the two synchronous pulleys b28 are connected by a synchronous belt b29.

[0033] like Figure 7 As shown, further, the cylinder driving device includes a cylinder 38 arranged at the end of the telescopic shaft 33 away from the paper core 5, a connecting nut is installed on the output shaft of the cylinder 38, a connecting sleeve 37 is circumferentially sleeved on the connecting nut, a bearing is sleeved on the end of the telescopic shaft 33 close to the cylinder 38, a bearing sleeve 36 is sleeved on the outer ring of the bearing, the bearing sleeve 36 and the connecting sleeve 37 are connected by fasteners, and the connecting sleeve 37 abuts against the outer ring of the bearing.

[0034] Furthermore, the outer shell of the cylinder 38 is also connected to the sliding sleeve 35, the other end of the sliding sleeve 35 is installed on the movable arm 11, the bearing sleeve 36 and the connecting sleeve 37 are installed on the inner wall of the sliding sleeve 35, the outer periphery of the bearing sleeve 36 is installed with a guide key, the inner wall of the sliding sleeve 35 is opened with a key slot, and the guide key is slidably connected in the key slot.

[0035] In this embodiment, the bearing sleeve 36 and the connecting sleeve 37 are connected together by long screws, and there is a guide key on the outer circle of the bearing sleeve 36. The piston rod of the cylinder 38 and the connecting sleeve 37 are connected together by nuts. The piston rod drives the bearing sleeve 36 and the connecting sleeve 37 to move in the sliding sleeve 35 under the control of the air circuit. The inner wall of the sliding sleeve 35 is processed with a keyway, which corresponds to the guide key on the outer circle of the bearing sleeve 36. When the piston rod is extended, the expansion key 30 rises, and when the piston rod is retracted, the expansion key 30 falls, thereby realizing the tightening and loosening of the paper core 5. Under the premise of ensuring that the force requirements of the expansion key 30 and the outer dimensions of the cylinder 38 meet the use requirements, it is necessary to connect four cylinders 38 in series to form a cylinder group, which can not only meet the use requirements, but also make the structure compact.

[0036] The third reduction motor 26 drives the shaft sleeve 32 to rotate synchronously. Since the expansion key 30 expands and passes through the through slot of the shaft sleeve 32, the shaft sleeve 32 and the telescopic shaft 33 can be regarded as a whole, that is, 26 also drives 33 to rotate. Since the expansion key 30 has clamped the paper core 5, the third reduction motor 26, the shaft sleeve 32, the telescopic shaft 33 and the paper core 5 rotate synchronously.

[0037] The present invention also discloses a double-station winding method with variable width, which adopts the double-station winding device with variable width disclosed in the above embodiment, and includes the following steps: S1: Move the two material shaft driving devices on the linear guide rail 12 to the corresponding loading and unloading working positions through the material shaft lateral adjustment device 10; S2: The paper core 5 is mounted on the tapered end of the telescopic shaft 33 of one of the material shaft driving devices, and the telescopic shaft 33 is driven by the cylinder 38 to move toward the direction close to the paper core 5, and the expansion key 30 passes through the shaft sleeve 32 and clamps the inner wall of the paper core 5, and then the telescopic shaft 33 of the other material shaft driving device is controlled by the material shaft lateral adjustment device 10 to penetrate the inner wall of the paper core 5, and the paper core 5 is clamped according to the above steps; S3: The third reduction motor 26 works, driving the shaft sleeve 32 and the telescopic shaft 33 to rotate synchronously, and further driving the paper core 5 to rotate to complete the winding; S4: After the winding is completed, the third reduction motor 26 stops working, the cylinder 38 works to drive the telescopic shaft 33 to move in the direction away from the paper core 5, and the expansion key 30 falls from the U-shaped groove of the shaft sleeve 32, releasing the clamping force of the expansion key 30 on the inner wall of the paper core 5; S5: Move one of the material shaft driving devices in a direction away from the paper core 5 through the material shaft lateral adjustment device 10, remove the paper core 5, repeat S1-S4, and perform a winding operation on the next paper core 5.

[0038] In specific use, first, according to the width requirements of the decorative paper printing machine, the material shaft driving device of the winding device transmission surface is moved to the corresponding loading and unloading work position through the material shaft lateral adjustment device with the operating surface as the reference; secondly, the 3-inch thick wallpaper core 5 is inserted into the transmission side telescopic shaft 33, the other end of the hand-held paper core 5 is aligned with the operating side telescopic shaft 33, and the operating side telescopic shaft 33 is inserted into the paper core 5, and then the expansion key 30 is inflated and tightened to align the paper core 5 with the material roll, and at the same time, preparations for material connection are made; finally, when the paper core 5 material roll being wound reaches the winding diameter requirement, the material roll is turned out through the guide roller device without stopping the machine through the material shaft rotating device, and the prepared paper core 5 is turned into the material receiving and cutting position to prepare for cutting. After cutting is completed, the new paper core 5 starts to be wound, and the turned out material roll is unloaded through auxiliary tools such as hydraulic lifting platforms. When unloading, it only needs to deflate and move the arm out to complete. The winding operation process of the double-station winding device saves time and effort, and saves labor costs.

[0039] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0040] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-station winding device with variable width, characterized in that: The invention comprises a central large support (13) arranged horizontally, and the two ends of the central large support (13) are rotatably connected to an operating side bracket (16) and a transmission side bracket (17); linear guide rails (12) are symmetrically installed on both sides of the central large support (13), and two oppositely arranged material shaft lateral adjustment devices (10) are installed on each linear guide rail (12); a movable arm (11) is installed on the side of the material shaft lateral adjustment device (10) away from the linear guide rail (12), and the two movable arms (11) are connected to a material shaft driving device, and a paper core (5) is installed between the two material shaft driving devices; the top and bottom of the central large support (13) are fixedly connected to a material passing roller bracket (3), and a material passing guide roller (2) is installed on the material passing roller bracket (3).

2. The double-station winding device with variable width according to claim 1 is characterized in that: The central large support (13) comprises a rectangular tube, with shaft heads fixedly connected to both ends of the rectangular tube, and the shaft heads are rotatably connected to an operating side bracket (16) and a transmission side bracket (17); the linear guide rail (12) and the feed roller bracket (3) are both mounted on the side wall of the rectangular tube.

3. The variable width double-station winding device according to claim 2, characterized in that: A bearing seat (15) is installed on both the operating side bracket (16) and the transmission side bracket (17), a spherical roller bearing (14) is installed in the bearing seat (15), and the shaft heads at both ends of the rectangular tube are rotatably connected to the spherical roller bearing (14) respectively.

4. The double-station winding device with variable width according to claim 2, characterized in that: A first reduction motor (7) is mounted on the transmission side bracket (17), a small gear (9) is mounted on the output end of the first reduction motor (7), a large gear (8) is fixedly connected to the shaft head close to the transmission side bracket (17), and the small gear (9) and the large gear (8) are meshed with each other.

5. The double-station winding device with variable width according to claim 1, characterized in that: The material shaft transverse adjustment device (10) comprises a second reduction motor (19) mounted on the central large support (13), a fixed support (22) and a support seat (25), the fixed support (22) and the support seat (25) being arranged opposite to each other, a ball screw (23) being rotatably connected inside the fixed support (22) and the support seat (25), a nut (24) being mounted on the ball screw (23), and the nut (24) moving along the linear guide rail (12); the output end of the second reduction motor (19) and the end of the ball screw (23) passing through the fixed support (22) are both connected to a synchronous pulley a (20), and the two synchronous pulleys a (20) are connected via a synchronous belt a (21); the nut (24) is connected to the movable arm (11).

6. The double-station winding device with variable width according to claim 1, characterized in that: The material shaft driving device comprises a base connected to the movable arm (11), on which a rotary driving device and a cylinder driving device are mounted; the material shaft driving device also comprises a shaft sleeve (32) and a telescopic shaft (33) which are sleeved together, the rotary driving device drives the shaft sleeve (32) to perform rotary motion, and the cylinder driving device drives the telescopic shaft (33) to perform linear motion; One end of the telescopic shaft (33) is tapered, and a plurality of T-shaped slots are evenly formed at the tapered end of the telescopic shaft (33) along the circumferential direction. A slider (31) is slidably connected in the T-shaped slot, and the slider (31) is connected to a key (30) via a fastener. A through slot is formed on the shaft sleeve (32) at a position corresponding to the T-shaped slot, and the key (30) moves linearly in the through slot to connect the paper core (5).

7. The double-station winding device with variable width according to claim 6, characterized in that: The rotary drive device comprises a third reduction motor (26) mounted on the mechanical arm (11); the end of the transmission shaft (27) of the third reduction motor (26) and the outer periphery of the shaft sleeve (32) are both sleeved with a synchronous pulley b (28); the two synchronous pulleys b (28) are connected via a synchronous belt b (29).

8. The double-station winding device with variable width according to claim 6, characterized in that: The cylinder drive device comprises a cylinder (38) arranged at an end of the telescopic shaft (33) away from the paper core (5); a connecting nut is mounted on the output shaft of the cylinder (38); a connecting sleeve (37) is circumferentially sleeved on the connecting nut; a bearing is sleeved on the end of the telescopic shaft (33) close to the cylinder (38); a bearing sleeve (36) is sleeved on the outer ring of the bearing; the bearing sleeve (36) and the connecting sleeve (37) are connected by a fastener, and the connecting sleeve (37) abuts against the outer ring of the bearing.

9. The double-station winding device with variable width according to claim 8, characterized in that: The outer shell of the cylinder (38) is also connected to a sliding sleeve (35), the other end of the sliding sleeve (35) is mounted on the movable arm (11), a bearing sleeve (36) and a connecting sleeve (37) are mounted on the inner wall of the sliding sleeve (35), a guide key is mounted on the outer periphery of the bearing sleeve (36), a key slot is formed on the inner wall of the sliding sleeve (35), and the guide key is slidably connected in the key slot.

10. A double-station winding method with variable width, using the double-station winding device with variable width as claimed in claim 8, characterized in that: The following steps are involved: S1: Move the two material shaft driving devices on the linear guide rail (12) to the corresponding loading and unloading working positions through the material shaft lateral adjustment device (10); S2: The paper core (5) is mounted on the conical end of the telescopic shaft (33) of one of the material shaft driving devices, and the telescopic shaft (33) is driven by the cylinder (38) to move in a direction close to the paper core (5), and the expansion key (30) passes through the shaft sleeve (32) and clamps the inner wall of the paper core (5), and then the telescopic shaft (33) of the other material shaft driving device is controlled by the material shaft lateral adjustment device (10) to penetrate the inner wall of the paper core (5), and the paper core (5) is clamped according to the above steps; S3: the third reduction motor (26) starts to work, driving the shaft sleeve (32) and the telescopic shaft (33) to rotate synchronously, and further driving the paper core (5) to rotate to complete the winding; S4: After the winding is completed, the third reduction motor (26) stops working, the cylinder (38) works to drive the telescopic shaft (33) to move in a direction away from the paper core (5), and the expansion key (30) falls from the U-shaped groove of the shaft sleeve (32), thereby releasing the clamping force of the expansion key (30) on the inner wall of the paper core (5); S5: Move one of the material shaft driving devices in a direction away from the paper core (5) through the material shaft lateral adjustment device (10), remove the paper core (5), repeat S1-S4, and perform a winding operation on the next paper core (5).

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