Air swelling shaft

Abstract

The utility model provides an air swelling shaft. The air swelling shaft comprises a rack, a shaft body, an air bag mechanism, an air path mechanism, a monitoring mechanism and a control mechanism. The shaft body comprises a shaft rod and a barrel body, the barrel body sleeves the outer side of the shaft rod, the shaft rod is rotatably connected to the rack, a cavity is formed in the barrel body, and a plurality of open holes are formed in the peripheral wall of the barrel body; the air bag mechanism is located in the cavity and arranged on the outer side of the shaft rod in a sleeving mode. The air bag mechanism comprises an air bag assembly and a supporting block installed on the surface of the air bag assembly. The gas path mechanism comprises a gas pipeline and a gas valve; the monitoring mechanism comprises a distance sensor; the control mechanism is electrically connected to the distance sensor, responds to distance information collected by the distance sensor and controls the air pressure of the air bag assembly according to the distance information. The monitoring mechanism is arranged to monitor the winding and unwinding states of the coiled material in real time, the air pressure of each air bag assembly in the air bag mechanism is dynamically adjusted, and the product yield is increased.

Description

Technical Field

[0001] This application relates to the field of winding and unwinding equipment technology, and in particular to an air expansion shaft. Background Technology

[0002] Air shafts, as key equipment widely used in roll-to-roll processes, are traditionally designed based on ideal operating conditions, assuming that the roll material maintains perfect concentricity after being fixed by the air shaft. However, in actual production applications, factors such as material design, coating processes, uneven air inflation, and air shaft deformation can cause eccentricity and swaying of the roll material during winding and unwinding. This leads to creases in the roll material, affecting coating, lamination, and appearance. Therefore, the design of existing air shafts urgently needs optimization and improvement to address actual operating conditions. Utility Model Content

[0003] To address the aforementioned issues, this application provides an air-expansion shaft capable of real-time monitoring of the roll winding and unwinding status and making timely adjustments.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] This application provides an air expansion shaft, which includes a frame, a shaft body, an airbag mechanism, an air passage mechanism, a monitoring mechanism, and a control mechanism. The shaft body includes a shaft rod and a cylinder, with the cylinder sleeved on the outside of the shaft rod. Both ends of the cylinder are connected to the shaft rod, and both ends of the shaft rod are rotatably connected to the frame. A cavity is formed inside the cylinder, and a plurality of openings are formed on the peripheral wall of the cylinder. The airbag mechanism is located inside the cavity and sleeved on the outside of the shaft rod. The airbag mechanism includes at least one airbag assembly and a support block mounted on the surface of the airbag assembly and protruding through the openings. The air passage mechanism includes a gas pipeline and a gas valve. One end of the gas pipeline is connected to the airbag assembly, and the other end of the gas pipeline is connected to the gas valve. The monitoring mechanism includes a distance sensor, which is mounted on the frame. The control mechanism is electrically connected to the distance sensor and responds to the distance information collected by the distance sensor and controls the air pressure of the airbag assembly according to the distance information.

[0006] Furthermore, the airbag mechanism includes a first airbag assembly and a second airbag assembly, the first airbag assembly including an annular airbag and the second airbag assembly including a fan-shaped annular airbag.

[0007] Furthermore, the second airbag assembly includes at least one fan-shaped airbag, the central angle of which is greater than 0° and less than or equal to 180°.

[0008] Furthermore, the central angle corresponding to the fan-shaped airbag is greater than or equal to 40° and less than or equal to 90°.

[0009] Furthermore, the air-expanding shaft includes at least two second airbag assemblies, which, when viewed along the axis of the shaft, are configured to be staggered from each other about the axis of the shaft.

[0010] Furthermore, the air-expanding shaft includes at least two second airbag assemblies, each airbag assembly containing n fan-shaped airbags, where n is greater than or equal to 1; viewed along the axis of the shaft, the at least two second airbag assemblies are configured to rotate about the axis of the shaft at an offset angle θ, which is greater than 0° and less than or equal to θ, θ = 360° / 2n.

[0011] Furthermore, the air shaft includes at least two first airbag assemblies, and the distance between the first airbag assembly and the second airbag assembly is greater than or equal to the length of the first airbag assembly.

[0012] Furthermore, the air shaft also includes a fixing mechanism, which includes a fixing head, a fixing seat, and a fixing adjuster. A part of the fixing head is rotatably connected to the fixing seat, and another part of the fixing head is connected to one end of the shaft. A part of the fixing adjuster is connected to the frame, and another part of the fixing adjuster abuts against the fixing seat.

[0013] Furthermore, the fixed adjuster includes two sets of drive groups, each containing two drives arranged along a straight line and acting on both sides of the fixed base, with the two sets of drive groups arranged perpendicular to each other.

[0014] Furthermore, the driver includes a linear driver driven by a cylinder or an electric motor.

[0015] Furthermore, the fixed adjuster also includes a guide rail, and the end of the driver is configured to mate with the guide rail.

[0016] Furthermore, the monitoring mechanism also includes a pivot positioner and a position sensor responsive to the pivot positioner. The pivot positioner is mounted on the shaft, and the position sensor is mounted on the frame. The control mechanism is also electrically connected to the position sensor. The control mechanism responds to distance information collected by the distance sensor and / or position information collected by the position sensor and controls the air pressure of the fixed adjuster and / or the airbag assembly based on the distance information and position information.

[0017] This application establishes a monitoring mechanism to monitor the roll material's unwinding and winding status in real time. A control mechanism dynamically adjusts the air pressure of each airbag component in the airbag mechanism based on the roll material's status obtained from the monitoring mechanism. This adjusts the roll material's posture and improves its appearance during unwinding and winding, enabling different roll materials to be unwound and wound smoothly and without wrinkles, improving the coating and lamination effect of the product and increasing the product yield. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of the air shaft provided in an embodiment of this application;

[0019] Figure 2 This is a partial structural schematic diagram of the air shaft provided in an embodiment of this application;

[0020] Figure 3 A schematic diagram of the electrical connections of the monitoring mechanism, control mechanism, and airbag mechanism provided in the embodiments of this application;

[0021] Figure 4 A schematic diagram of a first airbag assembly provided for an embodiment of this application;

[0022] Figure 5 A schematic diagram of a second airbag assembly provided for an embodiment of this application;

[0023] Figure 6 A schematic diagram of another second airbag assembly provided in an embodiment of this application;

[0024] Figure 7 A schematic diagram of the structure of the air shaft, fixing mechanism, and frame provided in the embodiments of this application;

[0025] Figure 8 for Figure 7 A cross-sectional view along the AA direction;

[0026] Figure 9 A schematic diagram of the electrical connections of another monitoring mechanism, control mechanism, and airbag mechanism provided for an embodiment of this application;

[0027] Figure 10 This is a schematic diagram illustrating the corrective oscillation state of the air shaft provided in an embodiment of this application.

[0028] In the figure: air shaft 100, frame 11, shaft body 12, shaft rod 121, cylinder 122, opening 1221, airbag mechanism 13, airbag assembly 131, first airbag assembly 1311, annular airbag 1311a, second airbag assembly 1312, fan-shaped annular airbag 1312a, support block 132, air passage mechanism 14, gas pipeline 141, gas valve 142, monitoring mechanism 15, distance sensor 151, shaft positioner 152, position sensor 153, control mechanism 16, fixing mechanism 17, fixing head 171, fixing seat 172, fixing adjuster 173, driver 1731, guide rail 1732, first plane 101, second plane 102. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. In the description of the present application, if a part has a central axis or a hollow cavity, the "inner side" of the part refers to the side of the part close to the central axis of the part or the part disposed inside the hollow cavity; the "outer side" of the part refers to the side of the part away from the central axis of the part or the part disposed outside the hollow cavity.

[0030] This application provides an embodiment of, as follows: Figure 1 and Figure 2 The air expansion shaft 100 shown includes a frame 11, a shaft body 12, an air bladder mechanism 13, an air passage mechanism 14, a monitoring mechanism 15, and a control mechanism 16. Figure 1 and Figure 2 (Not shown in the image).

[0031] The frame 11 is used to support other components of the air shaft 100.

[0032] The shaft 12 is one of the main working parts of the air expansion shaft 100. The shaft 12 includes a shaft 121 and a cylinder 122. The cylinder 122 is sleeved on the outside of the shaft 121, and both ends of the cylinder 122 are connected to the shaft 121. Both ends of the shaft 121 extend out of the cylinder 122. The two ends of the shaft 121 are rotatably connected to the frame 11, and the shaft 121 can rotate on the frame 11 under the drive of a corresponding drive device. A cavity is formed between the cylinder 122 and the shaft 121. Several openings 1221 are formed on the peripheral wall of the cylinder 122, and these openings 1221 can connect the cavity and the space outside the cylinder 122.

[0033] The airbag mechanism 13 is located inside the cavity and is sleeved on the outside of the shaft 121. The airbag mechanism 13 includes an airbag assembly 131 and a support block 132. The support block 132 is mounted on the surface of the airbag assembly 131 or abuts against the airbag assembly 131. The support block 132 can be driven by the airbag assembly 131. When the support block 132 is driven outward by the airbag assembly 131, it can extend through the opening 1221 on the surface of the cylinder 122. In the air expansion shaft 100 of this application, after the airbag assembly 131 is inflated, it drives the support block 132. The support block 132 extends out from the opening 1221 under the push of the airbag assembly 131. The extended support block 132 can abut against the sleeve and other structures that carry the roll material, thereby supporting the roll material. When the roll material rotates, it can fix the sleeve and prevent the sleeve from sliding. Finally, the rotation of the air expansion shaft 100 itself is transmitted to the roll material, so that the roll material also rotates to realize the winding or unwinding operation.

[0034] The gas path mechanism 14 is basically housed within the shaft 121. The gas path mechanism 14 includes a gas pipe 141 and a gas valve 142. The gas pipe 141 is basically located inside the shaft 121 and runs along the shaft 121. One end of the gas pipe 141 connects to the airbag assembly 131, and the gas valve 142 is located at the other end of the gas pipe 141, at the end of the shaft 121. The gas valve 142 controls the supply of gas from external equipment to the airbag assembly 131 through the gas pipe 141. When there are many airbag assemblies 131 in the air expansion shaft 100, multiple sets of gas paths can be configured to supply gas to different airbag assemblies 131. Specifically, when there are few airbag assemblies 131, the gas pipe 141 can be configured only from one end of the shaft 121 into the inside of the shaft 121 and connected to the airbag assembly 131. When there are a large number of airbag assemblies 131, two sets of gas pipelines 141 can be set from both ends of the shaft 121 into the interior of the shaft 121 and connected to the corresponding airbag assembly 131.

[0035] It is understandable that, since the air passage mechanism 14 needs to supply air to the airbag assembly 131, the gas pipe 141 in the air passage mechanism 14 will pass through the shaft 121 and connect to the airbag assembly 131. It is also understandable that, although not specifically described, the air passage mechanism 14 will also be connected to a gas supply device capable of generating or supplying gas, thereby supplying air to the airbag assembly 131. Furthermore, since the air pressure of the airbag assembly 131 needs to be adjusted according to actual operating conditions, it is understood that this application implicitly includes a component capable of venting gas from the airbag assembly 131. This venting component only needs to be able to expel gas from the airbag assembly 131, and this venting component can be connected to the airbag assembly 131 or to the air passage mechanism 14.

[0036] The monitoring mechanism 15 includes distance sensors 151, which are mounted to the frame 11. Specifically, the monitoring mechanism 15 includes at least two distance sensors 151, which are distributed along the axis of the shaft 121, i.e., all distance sensors 151 are distributed in a straight line, and this straight line is substantially parallel to the axis of the shaft 121. The distance sensors 151 can monitor the distance between the surface of the roll material and the distance sensor 151, and determine whether the rotation of the roll material is normal by comparing the distance information obtained by different distance sensors 151. When the distance information obtained by each distance sensor 151 is basically the same, it is determined that the rotation of the roll material is basically normal. If there are differences or large differences in the distance information obtained by each distance sensor 151, it is determined that the rotation of the roll material is in an abnormal state. Furthermore, the distance sensors 151 can be radar sensors, infrared sensors, or other sensors capable of measuring distance.

[0037] like Figure 3As shown, the control mechanism 16 is electrically connected to the distance sensor 151. The control mechanism 16 can adjust the operating state of the air shaft 100 according to the operating information collected by the monitoring mechanism 15. Specifically, the control mechanism 16 can adjust the pressure of the corresponding airbag assembly 131 in the air shaft 100 according to the distance information collected by the distance sensor 151, so that the distance between each distance sensor 151 and the roll material is basically equal, so that the roll material can rotate stably without swaying.

[0038] More specifically, N distance sensors 151 are evenly arranged along a straight line on the frame 11, where N ≥ 2. These N distance sensors 151 can acquire distance information between the distance sensor 151 and the roll material. The control mechanism 16 acquires the N distance information and determines the position where the air shaft 100 swings by judging the distance deviation between the distance information. After determining the swing position, the control mechanism 16 adjusts the air pressure of the airbag assembly 131 at the corresponding position to eliminate the swing, improve the stability of the roll material during winding or unwinding, and avoid defects such as wrinkles in the roll material.

[0039] As an optional implementation method, such as Figure 4 and Figure 5 As shown, the airbag mechanism 13 includes a first airbag assembly 1311 and a second airbag assembly 1312. The first airbag assembly 1311 includes an annular airbag 1311a, and the second airbag assembly 1312 includes a fan-shaped annular airbag 1312a. The airbag mechanism 13 is basically sleeved on the outside of the shaft 121, and the airbag mechanism 13 extends basically along the axial direction of the shaft 121. During inflation and deflation, the airbag assembly 131 can expand and contract in a direction perpendicular to the axis of the shaft 121, thereby driving the support block 132 disposed on the surface of the airbag assembly 131 to move. The annular airbag 1311a can cover the entire circumferential area of ​​the shaft 121, can uniformly drive the support block 132 disposed on the surface of the annular airbag 1311a, and can uniformly support the sleeve of the air-expansion shaft 100 carrying the rolled material from the entire circumference. The fan-shaped annular airbag 1312a only covers a portion of the circumferential area of ​​the shaft 121. Compared to the annular airbag 1311a, it has a relatively smaller volume and can expand or contract more quickly during inflation or deflation. In other words, the fan-shaped annular airbag 1312a has a faster response speed, enabling the air-expansion shaft 100 to adjust the rotation state of the roll more quickly and efficiently. The first airbag assembly 1311 with the annular airbag 1311a and the second airbag assembly 1312 with the fan-shaped annular airbag 1312a work together to improve the stability of the roll during rotation and achieve rapid response.

[0040] As an optional implementation method, such as Figure 5As shown, the second airbag assembly 1312 includes at least one fan-shaped annular airbag 1312a, with a central angle α greater than 0° and less than or equal to 180°. Further, the central angle α of the fan-shaped annular airbag 1312a is between 40° and 90°. Setting the central angle of the fan-shaped annular airbag 1312a within this range allows for rapid expansion or contraction, achieving a rapid response, while also providing more appropriate dimensions for stable and effective support of the roll material. The inclusion of at least one fan-shaped annular airbag 1312a in the second airbag assembly 1312 enables rapid adjustment of the support block 132 on the surface of the air shaft 100. Further, the inclusion of at least two fan-shaped annular airbags 1312a in the second airbag assembly 1312 allows the support block 132 disposed on the surface of the fan-shaped annular airbag 1312a to abut against the sleeve or other structure supporting the roll material from multiple directions, thereby providing uniform support for the roll material.

[0041] As an optional implementation, the air-expansion shaft 100 includes at least two second airbag assemblies 1312. Viewed along the axis of the shaft, the at least two second airbag assemblies are configured to be offset from each other about the axis of the shaft. It is understood that the aforementioned offset arrangement of the two second airbag assemblies is not merely to mean that the two second airbag assemblies 1312 appear to be offset from each other as a whole. It can also be understood that the two second airbag assemblies 1312 appear to be offset from each other in specific details. Specifically, for example, each of the two second airbag assemblies 1312 includes two identical fan-shaped airbags 1312a with a central angle of 180°. While the two second airbag assemblies 1312 appear to be identical overall (the entire area containing the second airbag assembly is completely filled), in specific details, if the interfaces of the two fan-shaped airbags 1312a in the two airbag assemblies 1312 are offset from each other, then the two second airbag assemblies should also be understood as being offset from each other. The arrangement of multiple second airbag assemblies 1312 in the air expansion shaft can improve the uniformity of overall expansion and contraction in the air expansion shaft 100. At least two second airbag assemblies 1312 are staggered to improve the overall response speed of the air expansion shaft 100, enabling timely and rapid expansion and contraction. The above-described arrangement of the second airbag assemblies 1312 can also be described as follows: the air expansion shaft 100 includes at least two second airbag assemblies 1312, each airbag assembly 1312 containing n fan-shaped annular airbags 1312a, where n is greater than or equal to 1; viewed along the axis of the shaft, the at least two second airbag assemblies are configured to be rotated and staggered by an angle θ about the axis of the shaft, where θ is greater than 0° and less than or equal to θ, θ = 360° / 2n. When n is greater than or equal to 2, the most preferred situation is that the n substantially identical fan-shaped annular airbags 1312a are evenly distributed in the second airbag assembly 1312 to improve the uniformity and stability of airbag expansion or contraction. For example, two first airbag assemblies 1312 can be provided on the shaft 12, such as Figure 5 As shown, in a second airbag assembly 1312, two fan-shaped airbags 1312a are symmetrically arranged about a first plane 101 (i.e., the two fan-shaped airbags 1312a are located on opposite sides of the first plane 101), as... Figure 6 The other second airbag assembly 1312 shown is symmetrically arranged about the second plane 102 (two fan-shaped airbags 1312a are located on both sides of the second plane 102), and both the first plane 101 and the second plane 102 pass through the axis of the shaft 121 and are offset from each other by an angle. Specifically, Figure 5 and Figure 6In the two second airbag assemblies 1312 shown, the first plane 101 and the second plane 102 are perpendicular to each other, that is, the two second airbag assemblies 1312 are configured to be rotated 90° apart about the axis of the shaft. This arrangement enables rapid response and timely, fast and uniform expansion or contraction of the airbags, improving the stability of the air shaft 100 during operation, and also improving the stability of the roll material subjected to the action of the air shaft 100.

[0042] In one specific implementation, at least two second airbag assemblies 1312 can be respectively disposed at both ends of the air expansion shaft 100, and the distance between the two second airbag assemblies 1312 and the center position of the air expansion shaft 100 is basically equal. This arrangement can ensure that the roll material can be subjected to uniform force and improve stability. The symmetrical arrangement of the second airbag assemblies 1312 relative to the air expansion shaft 100 can further improve the stability of the roll material when the air expansion shaft 100 is in action.

[0043] As an optional implementation, the air shaft 100 includes at least two first airbag assemblies 1311, and the distance between the second airbag assembly 1312 and the first airbag assembly 1311 is greater than or equal to the length of the first airbag assembly 1311. In this embodiment, at least two first airbag assemblies 1311 are provided at the middle position of the air shaft 100. The support block 132 provided on the surface of the first airbag assembly 1311 can extend from the middle position of the roll material to support the roll material, increase the stability of the air shaft 100 when adjusting the roll material, and also increase the anti-slip performance between the air shaft 100 and the sleeve or other structure carrying the roll material, preventing slippage between the air shaft 100 and the roll material. The distance between the second airbag assembly 1312 and the first airbag assembly 1311 is relatively long, and the second airbag assembly 1312 can more easily control the support block 132 to push the sleeve or other structure carrying the roll material.

[0044] As an optional implementation method, such as Figure 7 and Figure 8 As shown, the air shaft 100 also includes a fixing mechanism 17, which includes a fixing head 171, a fixing seat 172, and a fixing adjuster 173. A part of the fixing head 171 is rotatably connected to the fixing seat 172, and the other part of the fixing head 171 is connected to one end of the shaft 121. A part of the fixing adjuster 173 is connected to the frame 11, and the other part of the fixing adjuster 173 abuts against the fixing seat 172.

[0045] In this embodiment, the shaft 12 is connected to the frame 11 via a fixing mechanism 17. The fixing head 171 in the fixing mechanism 17 is connected to both ends of the shaft 12 by clamping the ends of the shaft 12. The fixing seat 172 is rotatably connected to the fixing head 171 via bearings or other components. A portion of the fixing adjuster 173 is connected to the frame 11, and the movable portion of the fixing adjuster 173 is connected to the fixing seat 172. The fixing head 171 can drive the shaft 12 to rotate via its own power or power applied by an external device. The fixing seat 172 is connected to the fixing head 171 via bearings or other components, and there is a relative degree of rotational freedom between the fixing seat 172 and the fixing head 171. The fixing adjuster 173 acts on the fixing seat 172, adjusting the relative position between the fixing seat 172 and the frame 11, thereby adjusting the relative position between the shaft 12 and the frame 11. During the operation of the air shaft 100, instability in the operation of the roll material may occur due to excessive weight of the roll material, uneven air inflation in the air shaft 100, or deformation of the air shaft 100. This can lead to swaying of the roll material, resulting in wrinkles, creases, and other issues that affect the coating and lamination of the roll material. The fixing adjuster 173 in the fixing mechanism 17 can fine-tune the position of the shaft 12 in a plane perpendicular to the axis of the shaft body 12. When the air shaft 100 sways, the fine-tuning of the shaft body 12 can restore the stable operation of the air shaft 100.

[0046] As an optional implementation method, such as Figure 7 and Figure 8 As shown, the fixed adjuster 173 includes two sets of drive groups. Each drive group includes two drives 1731 arranged along a straight line and acting on both sides of the fixed base 172. The two sets of drive groups are arranged perpendicular to each other. With the above arrangement, the four drives 1731 are arranged at 90° intervals on a circumference, which can basically realize the fine adjustment of the position of the shaft 12 in a plane perpendicular to the axis of the shaft 12.

[0047] As an optional implementation, the actuator 1731 includes a linear actuator driven by a cylinder or an electric motor. The actuator 1731 is selected as a linear actuator, and two linear actuators 1731 in the actuator group can cooperate with each other to adjust the relative position of the mounting base 172 in opposite directions. The two actuator groups contain four linear actuators 1731 arranged at 90° intervals on a circumference, enabling fine-tuning of the position of the shaft 12 in a plane perpendicular to the axis of the shaft 12.

[0048] As an optional implementation method, such as Figure 7 and Figure 8As shown, the fixed adjuster 173 also includes a guide rail 1732, and the end of the driver 1731 is configured to cooperate with the guide rail 1732. The guide rail 1732 can limit the direction of action of the driver 1731 when adjusting the chuck seat. After the movable end of the driver 1731 cooperates with the guide rail 1732, it can prevent directional deviation from occurring during the adjustment process.

[0049] As an optional implementation method, such as Figure 7 and Figure 8 As shown, the monitoring mechanism 15 also includes a shaft positioner 152 and a position sensor 153 responsive to the shaft positioner 152. The shaft positioner 152 is mounted on the shaft 121, and the position sensor 153 is mounted on the frame 11. Figure 9 As shown, the control mechanism 16 is also electrically connected to the position sensor 153. The control mechanism 16 responds to the distance information collected by the distance sensor 151 and / or the position information collected by the position sensor 153, and controls the air pressure of the fixed adjuster 173 and / or the airbag assembly 131 based on the distance and position information. The position sensor 153 and the shaft positioner 152 cooperate to identify the rotation angle when the roll material swings during rotation, enabling better identification of the swing position and improving the convenience and accuracy of subsequent adjustments to the air pressure of the airbag assembly 131 and the shaft position. Specifically, the position sensor 153 can send a signal, the shaft positioner 152 reflects the signal after receiving it, and the position sensor 153 receives the signal again. The state of the transmitted and received signals can be used to determine the rotation angle when the roll material swings. Specifically, as shown... Figure 10 As shown, during the rotation of the air shaft 100 at the first position ( Figure 10 The solid line portion (in the middle) oscillated. The monitoring mechanism 15 received signals through the distance sensor 151 and the position sensor 153 and determined that it was in an oscillating state. At the same time, it calculated that the air shaft 100 should be adjusted to the second position (in the middle solid line portion). Figure 10 The dashed section in the middle can eliminate this oscillation. Then the control mechanism 16 controls the four drivers 1731 in the fixed adjuster 173 to finely adjust the position of the air shaft 100 from the first position to the second position along the direction of the arrow.

[0050] In this application, the air expansion shaft is equipped with a monitoring mechanism to monitor the winding and unwinding status of the roll material in real time. The control mechanism can dynamically adjust the air pressure of each airbag component based on the roll material status obtained by the monitoring mechanism, thereby improving the rotation dynamics of the roll material during the winding and unwinding process and increasing the product yield.

[0051] Finally, it should be noted that the above are only some preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An air-bag axle, characterized in that The air inflation shaft comprises a rack, a shaft body, an air bag mechanism, a gas path mechanism, a monitoring mechanism and a control mechanism. The shaft body comprises a shaft rod and a cylinder, the cylinder is sleeved outside the shaft rod, two ends of the cylinder are connected to the shaft rod, two ends of the shaft rod are rotationally connected to the rack, a cavity is formed in the cylinder, and a plurality of openings are formed in the peripheral wall of the cylinder. The air bag mechanism is located in the cavity and sleeved outside the shaft rod, the air bag mechanism comprises at least one air bag assembly and a support block installed on the surface of the air bag assembly and capable of being extended out of the opening. The gas path mechanism comprises a gas pipeline and a gas valve, one end of the gas pipeline is communicated with the air bag assembly, and the other end of the gas pipeline is connected to the gas valve. The monitoring mechanism comprises a distance sensor installed on the rack, the control mechanism is electrically connected to the distance sensor, the control mechanism responds to distance information collected by the distance sensor and controls the air pressure of the air bag assembly according to the distance information.

2. The air inflation shaft according to claim 1, wherein the air bag mechanism comprises a first air bag assembly and a second air bag assembly, the first air bag assembly comprises an annular air bag, and the second air bag assembly comprises a fan-shaped annular air bag.

3. The air inflation shaft according to claim 2, wherein the second air bag assembly comprises at least one fan-shaped annular air bag, and a corresponding central angle of the fan-shaped annular air bag is greater than 0° and less than or equal to 180°.

4. The air inflation shaft according to claim 3, wherein the air inflation shaft comprises at least two second air bag assemblies, and the at least two second air bag assemblies are arranged to be staggered around the axis of the shaft body when viewed along the axis of the shaft body.

5. The air inflation shaft according to claim 2, wherein the air inflation shaft comprises at least two first air bag assemblies, and a distance between the first air bag assembly and the second air bag assembly is greater than or equal to a length of the first air bag assembly.

6. The air inflation shaft according to claim 1, further comprising a fixing mechanism, the fixing mechanism comprises a fixing head, a fixing seat and a fixing adjuster, a part of the fixing head is rotationally connected to the fixing seat, another part of the fixing head is connected to one end of the shaft rod, one part of the fixing adjuster is connected to the rack, and another part of the fixing adjuster abuts against the fixing seat.

7. The air inflation shaft according to claim 6, wherein the fixing adjuster comprises two groups of drivers, each group of drivers comprises two drivers arranged in a straight line and acting on two sides of the fixing seat, and the two groups of drivers are arranged perpendicular to each other.

8. The air inflation shaft according to claim 7, wherein the driver comprises a pneumatic cylinder or a linear driver driven by a motor.

9. The air inflation shaft according to claim 7, wherein the fixing adjuster further comprises a guide rail, and an end of the driver is configured to be matched with the guide rail.

10. The air inflation shaft according to claim 7, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ The monitoring mechanism further comprises a rotating shaft positioner installed on the shaft rod and a position sensor responsive to the rotating shaft positioner, the position sensor being installed on the frame; the control mechanism is further electrically connected to the position sensor, the control mechanism being responsive to distance information collected by the distance sensor and / or position information collected by the position sensor and controlling the fixing adjuster and / or air pressure of the air bag assembly according to the distance information and the position information.

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