Winding and unwinding shaft and winding and unwinding device

Abstract

The embodiment of the invention provides a winding and unwinding shaft and a winding and unwinding device, and relates to the technical field of winding and unwinding equipment.The winding and unwinding shaft comprises a main core shaft, an auxiliary core shaft and an auxiliary core shaft, the expansion chuck comprises a connecting piece, a plurality of friction pieces and a wedge-shaped movable block, the connecting piece is connected with one end of the main mandrel, the connecting piece is provided with a first movable cavity and a second movable cavity, the first movable cavity extends in the radial direction of the main mandrel, the second movable cavity extends in the axial direction of the main mandrel, and the friction pieces are movably arranged in the first movable cavity; the wedge-shaped movable block is movably arranged in the second movable cavity, the wedge-shaped movable block is provided with a wedge-shaped inclined plane, and the friction pieces are arranged around the periphery of the wedge-shaped inclined plane; the pressurizing mechanism is installed in the containing cavity and used for pushing the wedge-shaped movable block to move in the axial direction of the main mandrel. In the embodiment of the invention, the wedge-shaped inclined surface can convert the thrust of the pressurizing mechanism into larger radial acting force, so that the condition of relative sliding between the friction piece and the winding drum is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of winding and unwinding equipment, and particularly relates to a winding and unwinding shaft and a winding and unwinding device. BACKGROUND

[0002] In the related art, the air expansion shaft is a precision shaft that fixes and loosens the winding core tube by inflation and deflation. When a certain pressure (usually 0.5 Mpa) of compressed air is injected into the air expansion shaft through the air nozzle, the internal expansion body (such as a rubber air bag or a special structure) will be pressed outward and expand, and will push the key strips, slats or slip rings and other parts on the surface to protrude radially. These protruding parts will tightly and uniformly bite or push against the inner wall of the paper tube, metal winding drum and other winding materials, thereby transmitting torque and driving the winding materials to rotate. When it is necessary to remove the winding materials, the compressed air in the air expansion shaft is manually or controlled to be released, and after the internal pressure disappears, the protruding parts will quickly retract to the inner diameter surface of the air expansion shaft under the action of the spring or the elasticity of the rubber itself. At this time, the outer diameter of the air expansion shaft returns to its original state, and is separated from the inner wall of the winding materials, so that the winding materials can be easily removed.

[0003] When higher production efficiency is required, the speed of the winding and unwinding equipment needs to be improved. When the speed of the winding and unwinding equipment is improved, the radial clamping force provided by the air expansion shaft is often insufficient, which can easily cause long stopping time or even slipping. In order to solve this problem, the radial clamping force can only be improved by increasing the force receiving cross-sectional area or increasing the air pressure. However, such measures can cause the cost of the equipment to increase linearly and the space requirement to increase. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a winding and unwinding shaft and a winding and unwinding device, which can improve the radial clamping force of the expansion clamp.

[0005] Embodiments of the first aspect of the present application provide a winding and unwinding shaft, comprising:

[0006] The main shaft has a receiving cavity;

[0007] The expansion clamp comprises a connecting piece, a plurality of friction pieces and a wedge-shaped movable block, the connecting piece is connected to one end of the main shaft, the connecting piece has a first movable cavity and a second movable cavity, the first movable cavity extends along the radial direction of the main shaft, the second movable cavity extends along the axial direction of the main shaft, the plurality of friction pieces are movably arranged in the first movable cavity, and the wedge-shaped movable block is movably arranged in the second movable cavity, wherein the wedge-shaped movable block has a wedge-shaped inclined surface, and the plurality of friction pieces are arranged around the outer periphery of the wedge-shaped inclined surface.

[0008] A boosting mechanism is installed in the accommodating cavity, and is used to push the wedge-shaped movable block to move along the axial direction of the main shaft, so that the wedge-shaped movable block pushes the friction pieces to move along the radial direction of the main shaft.

[0009] Further, the boosting mechanism is an electro-hydraulic boosting cylinder, which includes a piston rod used to push the wedge-shaped movable block to move.

[0010] Further,

[0011] The connecting piece includes a third movable cavity located between the second movable cavity and the accommodating cavity.

[0012] The expansion chuck includes a connecting block, which includes a first fitting part and a second fitting part, the first fitting part is in sliding connection with the second movable cavity, one end of the first fitting part is fixedly connected with the wedge-shaped movable block, the other end of the first fitting part is connected with the second fitting part, the second fitting part is in movable connection with the third movable cavity, wherein the connecting block and the third movable cavity enclose a return chamber.

[0013] The take-up reel has a return flow channel in fluid communication with the return chamber, and is used to deliver fluid to the return chamber to drive the connecting block to move towards the direction close to the accommodating cavity.

[0014] Further,

[0015] The return flow channel includes a first channel and a second channel.

[0016] The main shaft is provided with the first channel.

[0017] The connecting piece is provided with the second channel, one end of the second channel is in communication with the first channel, and the other end of the second channel is connected with the end face of the return chamber away from the accommodating cavity.

[0018] Further, the take-up reel includes a rotary joint and a core-to-core sealing element.

[0019] The rotary joint is in rotational connection with one end of the main shaft away from the expansion chuck, and is provided with an annular cavity, the first channel is in fluid communication with the annular cavity.

[0020] The core-to-core sealing element is arranged between the rotary joint and the main shaft, and is located at least one side of the annular cavity.

[0021] Further, the winding and unwinding reel further comprises a gas supply device, an output end of the gas supply device being connected with the rotary joint, and the gas supply device being configured to supply gas to the annular cavity.

[0022] Further, the main shaft has a third channel, one end of the third channel being connected with the accommodating cavity, and the third channel being coaxially arranged with the main shaft.

[0023] The winding and unwinding reel comprises a wire tube and a conductive slip ring.

[0024] The wire tube is arranged in the third channel, and the wire harness of the electro-hydraulic intensifier cylinder is arranged in the wire tube.

[0025] The conductive slip ring is arranged at an end of the main shaft away from the expansion chuck, the conductive slip ring comprises a rotor end and a stator end, the rotor end is arranged in the third channel, and a wiring end of the wire harness is electrically connected with the rotor end.

[0026] Further,

[0027] The wire tube and the third channel have a gap therebetween, and the first channel and the annular cavity are respectively communicated with the gap.

[0028] The winding and unwinding reel comprises a first sealing member and a second sealing member, the first sealing member is arranged between the wire tube and the third channel, and the first sealing member is located at an end of the wire tube close to the accommodating cavity, the second sealing member is arranged between the wire tube and the third channel, and the second sealing member is located at an end of the wire tube away from the accommodating cavity.

[0029] Further, a bearing assembly is further included, and the main shaft is rotatably connected with the outside through the bearing assembly.

[0030] The second aspect of the present application provides a winding and unwinding device comprising the winding and unwinding reel as described above.

[0031] From the above technical solutions, the present application has at least the following beneficial effects:

[0032] In the winding and unwinding reel and the winding and unwinding device provided by the present application, the intensifier mechanism pushes the wedge-shaped movable block to displace along the axial direction of the main shaft, so that the wedge-shaped movable block pushes the friction members located at the outer periphery of the wedge-shaped inclined surface to displace along the radial direction of the main shaft, so that the friction members can be in contact with the inner wall of the winding drum. In the present application, the wedge-shaped inclined surface can convert the pushing force of the intensifier mechanism into a larger radial force. Thus, the radial force can press the core pipe of the winding drum with the friction members, reducing the relative sliding between the friction members and the winding drum, facilitating the torque to be transmitted without sliding, and being applicable to the scene of high-speed winding and unwinding. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a take-up and untake-down reel provided in one embodiment of this application;

[0035] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure at position AA in the middle;

[0036] Figure 3 for Figure 2 A magnified view of part M in the middle;

[0037] Figure 4 for Figure 2 A magnified view of part N in the diagram.

[0038] Figure label:

[0039] 100. Main spindle; 110. Receiving cavity; 120. First channel; 130. Third channel;

[0040] 210. Connector; 211. First movable cavity; 212. Second movable cavity; 213. Third movable cavity; 214. Retraction chamber; 215. Second channel; 220. Friction element; 230. Wedge-shaped movable block; 231. Wedge-shaped inclined surface; 240. Connecting block; 241. First mating part; 242. Second mating part;

[0041] 300, Pressure boosting mechanism; 310, Piston rod; 320, Cable guide tube; 331, First seal; 332, Second seal; 340, Conductive slip ring; 341, Rotor end; 342, Stator end;

[0042] 400. Rotary joint; 410. Annular cavity; 420. Inter-spindle seal;

[0043] 510, First bearing; 520, Second bearing. Detailed Implementation

[0044] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0045] Referring to Figures 1 to 4 As shown in the drawings, the embodiments of the first aspect of the present application disclose a winding and unwinding reel, comprising a main shaft 100, an expansion chuck and a supercharging mechanism 300.

[0046] Specifically, the main shaft 100 has a receiving cavity 110, which is used to accommodate the supercharging mechanism 300; the expansion chuck comprises a connecting piece 210, a plurality of friction pieces 220 and a wedge-shaped movable block 230, the connecting piece 210 is connected with one end of the main shaft 100, the connecting piece 210 has a first movable cavity 211 and a second movable cavity 212, the first movable cavity 211 extends along the radial direction of the main shaft 100, the second movable cavity 212 extends along the axial direction of the main shaft 100, the plurality of friction pieces 220 are movably arranged in the first movable cavity 211, and the wedge-shaped movable block 230 is movably arranged in the second movable cavity 212, wherein the wedge-shaped movable block 230 has a wedge-shaped inclined surface 231, and the plurality of friction pieces 220 are arranged around the outer periphery of the wedge-shaped inclined surface 231; the supercharging mechanism 300 is installed in the receiving cavity 110, and the supercharging mechanism 300 is used to push the wedge-shaped movable block 230 to move along the axial direction of the main shaft 100, so that the wedge-shaped movable block 230 pushes the plurality of friction pieces 220 to displace along the radial direction of the main shaft 100.

[0047] In the winding and unwinding reel provided by the embodiments of the present application, the supercharging mechanism 300 pushes the wedge-shaped movable block 230 to displace along the axial direction of the main shaft 100, so that the wedge-shaped movable block 230 pushes the friction pieces 220 located around the outer periphery of the wedge-shaped inclined surface 231 to displace along the radial direction of the main shaft 100, thereby enabling the friction pieces 220 to contact the core pipe of the winding drum.

[0048] In the embodiments of the present application, the wedge-shaped inclined surface 231 can convert the pushing force of the supercharging mechanism 300 into a greater radial force, which can press the friction pieces 220 against the core pipe of the winding drum, thereby reducing the relative sliding between the friction pieces 220 and the core pipe, and facilitating the torque to be transmitted without sliding.

[0049] In one embodiment, the supercharging mechanism 300 is an electro-hydraulic supercharging cylinder, which comprises a piston rod 310, and the piston rod 310 is used to push the wedge-shaped movable block 230 to displace.

[0050] Specifically, the electro-hydraulic intensifier cylinder can provide stable and strong thrust, which can push each friction piece 220 to move along the radial direction of the main shaft 100 through the wedge-shaped slope 231 of the wedge-shaped movable block 230, and make each friction piece 220 press the inner wall of the winding drum.

[0051] In this embodiment, by combining the "hydraulic intensification" of the electro-hydraulic intensifier cylinder with the "mechanical gain" of the expansion chuck, "double intensification" is achieved, so that a more compact size can be used to make the winding and unwinding shaft produce greater clamping force. Compared with driving the expansion chuck to clamp by a pneumatic method, the clamping force of the expansion chuck is controlled by the electro-hydraulic intensifier cylinder in this embodiment, so that the clamping force is more accurate, programmable, real-time monitorable and feedbackable, and the influence of air pressure fluctuation is also avoided. It is particularly suitable for precise winding and unwinding applications with high tension control requirements. At the same time, the electro-hydraulic intensifier cylinder has zero energy consumption and no heating when pressure is maintained, and the clamping state is extremely stable. Therefore, the safety and reliability of the winding and unwinding shaft are improved.

[0052] In a possible application scenario, the electro-hydraulic intensifier cylinder can accurately control the extension and retraction of the piston rod 310 according to the instructions of the control system, so as to control the direction and distance of the movement of the wedge-shaped movable block 230.

[0053] In one embodiment, referring to Figure 2 and Figure 3 The connecting piece 210 includes a third movable cavity 213 located between the second movable cavity 212 and the containing cavity 110. The expansion chuck includes a connecting block 240, which includes a first matching part 241 and a second matching part 242. The first matching part 241 is in sliding connection with the second movable cavity 212, and one end of the first matching part 241 is fixedly connected with the wedge-shaped movable block 230. The other end of the first matching part 241 is connected with the second matching part 242, and the second matching part 242 is movably connected with the third movable cavity 213. The connecting block 240 and the third movable cavity 213 enclose a return chamber 214. The winding and unwinding shaft has a return flow channel in fluid communication with the return chamber 214. The return flow channel is used to deliver fluid to the return chamber 214 to drive the connecting block 240 to displace towards the direction close to the containing cavity 110.

[0054] In actual application, when it is needed to loosen the clamping of the expansion chuck on the winding drum core pipe, the electro-hydraulic intensifier cylinder is first decompressed, and then fluid can be delivered to the return chamber 214 through the return flow channel to push the connecting block 240 to displace towards the direction close to the containing cavity 110, thereby driving the wedge-shaped movable block 230 to move, so that the friction piece 220 retracts along the radial direction of the main shaft 100, and the close contact with the winding drum core pipe is released.

[0055] It is worth understanding that the fluid driving the return of the connecting piece 210 can be liquid or gas, which is not limited here.

[0056] In one possible implementation, the backflow channel includes a first channel 120 and a second channel 215; the main shaft 100 is provided with the first channel 120; the connecting piece 210 is provided with the second channel 215, one end of the second channel 215 is in communication with the first channel 120, and the other end of the second channel 215 is connected to the end of the backflow chamber 214 away from the end face of the containing cavity 110. Wherein, one end of the first channel 120 is used for connection with the outside, so that the fluid can be transported from the first channel 120 to the backflow chamber 214 through the second channel 215, and the driving of the connecting block 240 is realized.

[0057] In one embodiment, referring to Figure 2 and Figure 4 , the winding and unwinding shaft includes a rotary joint 400 and a shaft-to-shaft seal 420. The rotary joint 400 is rotationally connected to the end of the main shaft 100 away from the expansion chuck, and the rotary joint 400 is provided with an annular cavity 410, and the first channel 120 is in fluid communication with the annular cavity 410; the shaft-to-shaft seal 420 is arranged between the rotary joint 400 and the main shaft 100, and is located at least one side of the annular cavity 410. When the main shaft 100 rotates, the rotary joint 400 can remain relatively stationary; at the same time, the rotary joint 400 ensures the normal transportation of the fluid through the communication of the annular cavity 410 with the first channel 120. The shaft-to-shaft seal 420 effectively prevents fluid leakage and ensures that the connecting piece 210 can move towards the side close to the containing cavity 110.

[0058] In one embodiment, the winding and unwinding shaft further includes a gas supply device (not shown in the figure), the output end of the gas supply device is connected to the rotary joint 400, and the gas supply device is used to transport gas to the annular cavity 410 to drive the connecting piece 210 and the wedge-shaped movable block 230 to move towards the side close to the containing cavity 110.

[0059] In one embodiment, referring to Figure 2 and Figure 4 , the main shaft 100 has a third channel 130, one end of the third channel 130 is connected to the containing cavity 110, and the third channel 130 is coaxially arranged with the main shaft 100. The winding and unwinding shaft includes a wire tube 320 and a conductive slip ring 340, the wire tube 320 is arranged in the third channel 130, and the wire harness of the electro-hydraulic intensifier cylinder is arranged in the wire tube 320 to protect the wire harness. The conductive slip ring 340 is arranged at the end of the main shaft 100 away from the expansion chuck, and the conductive slip ring 340 includes a rotor end 341 and a stator end 342, the rotor end 341 is arranged in the third channel 130, and the wire end of the wire harness is electrically connected to the rotor end 341. The wire harness of the electro-hydraulic intensifier cylinder is arranged in the wire tube 320, which reduces the possibility of damage of the wire harness due to mutual entanglement or friction, and improves the service life and safety of the wire harness.

[0060] It is worth understanding that the wire harness of the electro-hydraulic intensifier cylinder includes power lines and feedback lines, which are connected to the rotor end 341 of the conductive slip ring 340 and rotate with the main shaft 100.

[0061] In the above embodiment, the rotor end 341 can rotate with the main shaft 100, and the stator end 342 is connected to the control system and is stationary relative to the control system. That is, the conductive slip ring 340 is arranged so that the wire harness of the electro-hydraulic intensifier cylinder can maintain stable electrical connection during rotation of the main shaft 100, ensuring that the electro-hydraulic intensifier cylinder can continuously receive control signals and work normally, thereby realizing power supply and signal transmission of the electro-hydraulic intensifier cylinder in the rotating state of the main shaft 100.

[0062] In one embodiment, referring to Figure 2 and Figure 4 , the overline tube 320 has a gap between the third channel 130, and the first channel 120 and the annular cavity 410 are respectively communicated with the gap; the take-up reel includes a first sealing member 331 and a second sealing member 332, the first sealing member 331 is arranged between the overline tube 320 and the third channel 130, and the first sealing member 331 is located at one end of the overline tube 320 close to the containing cavity 110, and the second sealing member 332 is arranged between the overline tube 320 and the third channel 130, and the second sealing member 332 is located at one end of the overline tube 320 away from the containing cavity 110. The arrangement of the first sealing member 331 and the second sealing member 332 effectively prevents fluid from leaking from the gap between the overline tube 320 and the third channel 130, ensuring the normal driving of the connecting member 210 and the wedge-shaped movable block 230 by the fluid.

[0063] In the above embodiment, the overline tube 320 can function to isolate the backflow channel and the wire harness of the electro-hydraulic intensifier cylinder.

[0064] It is worth understanding that in actual application, the first sealing member 331 and the second sealing member 332 can be selected according to the specific working environment and fluid medium to achieve the best sealing effect.

[0065] In one embodiment, the take-up reel further includes a bearing assembly, and the main shaft 100 is rotatably connected to the outside through the bearing assembly. The arrangement of the bearing assembly provides stable support for the rotation of the main shaft 100, reducing friction and wear during rotation.

[0066] In one possible implementation, referring to Figure 1 , the bearing assembly includes a first bearing 510 and a second bearing 520, and the first bearing 510 and the second bearing 520 are arranged at both ends or appropriate positions of the main shaft 100.

[0067] The embodiment of the second aspect of the present application discloses a winding and unwinding device, comprising a winding and unwinding shaft as described above, which is used in cooperation with the core pipe of the winding drum.

[0068] It is worth understanding that, in the winding and unwinding device disclosed by the embodiment of the second aspect of the present application, because the winding and unwinding shaft has greater radial thrust, the expansion chuck can press the inner wall of the core pipe of the winding drum, thereby reducing the probability of relative displacement between the expansion chuck and the inner wall of the winding drum, and facilitating the realization of torque without slip transmission.

[0069] The winding and unwinding shaft and the winding and unwinding device disclosed by the embodiment of the present application are described in detail below with reference to a specific embodiment.

[0070] In the present embodiment, referring to Figures 1 to 4 , the pressure increasing mechanism 300 is an electro-hydraulic pressure increasing cylinder. When the expansion chuck needs to clamp the winding drum, the electro-hydraulic pressure increasing cylinder is started. The electro-hydraulic pressure increasing cylinder integrates a servo motor, a speed reduction mechanism, a hydraulic pressure increasing unit and other mechanisms inside. Specifically, when the servo motor receives a control signal, the servo motor generates a huge linear thrust through transmission, and the thrust acts on the axial acting surface of the wedge-shaped movable block 230 through the piston rod 310 of the electro-hydraulic pressure increasing cylinder, so as to push the wedge-shaped movable block 230 to displace. The wedge-shaped movable block 230 pushes the friction piece 220 to displace along the radial direction of the main shaft 100 through displacement, and the friction piece 220 is pressed against the inner wall of the winding drum. The friction piece 220 can be an expansion sheet or a friction block.

[0071] In the present embodiment, the wedge-shaped movable block 230 is designed with a wedge-shaped slope 231. When the huge axial thrust (F axial ) exerted by the electro-hydraulic pressure increasing cylinder is transmitted through the wedge-shaped slope 231 of the wedge-shaped movable block 230, it is efficiently converted into a greater radial expansion force (F radial ) according to its mechanical gain coefficient, i.e. the slope ratio. The relationship can be simplified as: F radial ≈ F axial × mechanical gain coefficient.

[0072] In the present embodiment, the radial expansion force forces a plurality of expansion sheets (or friction blocks) to overcome the force of the return spring and uniformly expand outward in the radial direction, so as to firmly press the inner wall of the winding drum and realize torque without slip transmission. The entire clamping process is accurately managed by the electric control system, so as to realize precise clamping force control and pressure maintenance, and the motor does not need to be continuously operated during pressure maintenance, so the energy consumption is extremely low.

[0073] In the present embodiment, during the winding or unwinding operation, the main shaft 100, the expansion chuck and the electro-hydraulic pressure increasing cylinder providing clamping force are driven by the driving end (such as a gear motor) to rotate together with the winding drum as a complete rotating assembly.

[0074] In this embodiment, the conductive slip ring 340 is used to supply power to the rotating electro-hydraulic intensifier cylinder and transmit control signals. Specifically, the power supply line and feedback line of the electro-hydraulic intensifier cylinder are connected to the rotor end 341 of the conductive slip ring 340, which rotates with the shaft; the stator end 342 of the conductive slip ring 340 is connected to the control system of the fixed part. This design ensures continuous and stable transmission of power and signals, completely unaffected by rotational motion, and realizes closed-loop intelligent control of the rotating actuator.

[0075] In this embodiment, when it is necessary to unload the roll, the electro-hydraulic intensifier cylinder is first depressurized. To ensure that the expansion chuck can be reliably loosened in various situations, the take-up and pay-off shaft drives the wedge-shaped movable block 230 to retreat through a pneumatic mode, so that the expansion chuck can loosen the roll. Specifically, compressed air enters the retreat flow channel and the retreat chamber 214 through the rotary joint 400, the gas pressure acts on the connecting piece 210 in the retreat chamber 214, generating an axial force opposite to the direction of the thrust of the electro-hydraulic intensifier cylinder, which drives the wedge-shaped movable block 230 of the expansion chuck to reset, thereby driving the expansion pieces or friction blocks to retract to the original position, thereby completely releasing the clamping of the roll.

[0076] In this embodiment, in order to ensure the normal operation of the take-up and pay-off shaft, multiple seals are designed at key interfaces to ensure the sealing of the internal gas circuit and hydraulic circuit, preventing pressure leakage from causing functional failure. Specifically, a sealing ring is provided at the connection between the expansion chuck and the main shaft 100, which can effectively prevent gas from leaking from the junction between the expansion chuck and the main shaft 100; the first and second sealing members 331 and 332 provided between the third channel 130 and the wire passage 320 together constitute an annular seal between the main shaft 100 and the internal wire passage 320 to isolate the gas circuit and the cable channel; the shaft inter-seal member 420 is provided between the rotary joint 400 and the main shaft 100, and further, the shaft inter-seal member 420 is provided on both sides of the annular cavity 410 to ensure that there is no leakage during the transmission of compressed air from the fixed rotary joint 400 to the rotating main shaft 100.

[0077] In this embodiment, the electro-hydraulic intensifier cylinder replaces the traditional pure pneumatic pressure to provide the expansion chuck with an ultra-high axial thrust (F axial ), which is converted into several times the radial expansion force (F radial ) through the mechanical gain of the wedge-shaped slope 231 inside the expansion chuck, driving the expansion pieces or friction blocks to expand outward and firmly clamp the inner wall of the roll. When working, the main shaft 100, the expansion chuck, and the electro-hydraulic intensifier cylinder rotate as a whole with the roll. The power and signals required by the electro-hydraulic intensifier cylinder are transmitted without loss through the conductive slip ring 340 in the rotating state, realizing intelligent control. When unloading, compressed air enters the retreat chamber through the rotary joint 400 and the retreat flow channel, generating a reverse force to drive the expansion chuck to reset, and the expansion pieces retract.

[0078] It is worth understanding that the winding and unwinding shaft provided in the embodiments of this application can be used to replace the traditional pure pneumatic expansion shaft to achieve high torque, high precision, and intelligent control of clamping and releasing of roll materials (such as paper, film, metal foil, and fabric). It has the advantages of huge clamping force, precise control, zero energy consumption for pressure holding, and safe and reliable release.

[0079] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0080] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0081] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0082] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0083] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

Claims

1. A roll dispensing reel characterized by, The application relates to a reel, comprising: a main shaft having a receiving cavity; a tensioning chuck, comprising a connecting piece, a plurality of friction pieces and a wedge-shaped movable block, the connecting piece being connected with one end of the main shaft, the connecting piece having a first movable cavity and a second movable cavity, the first movable cavity extending along the radial direction of the main shaft, the second movable cavity extending along the axial direction of the main shaft, the plurality of friction pieces being movably arranged in the first movable cavity, and the wedge-shaped movable block being movably arranged in the second movable cavity, wherein the wedge-shaped movable block has a wedge-shaped inclined surface, and the plurality of friction pieces are arranged around the outer periphery of the wedge-shaped inclined surface; a pressure boosting mechanism installed in the receiving cavity, the pressure boosting mechanism being used for pushing the wedge-shaped movable block to move along the axial direction of the main shaft, so that the wedge-shaped movable block pushes the plurality of friction pieces to displace along the radial direction of the main shaft.

2. A roll dispensing / reeling shaft according to claim 1, characterized in that, The pressure boosting mechanism is an electro-hydraulic pressure boosting cylinder, and the electro-hydraulic pressure boosting cylinder comprises a piston rod used for pushing the wedge-shaped movable block to displace.

3. The reel according to claim 2, wherein: the connecting piece comprises a third movable cavity, the third movable cavity being located between the second movable cavity and the receiving cavity; the tensioning chuck comprises a connecting block, the connecting block comprising a first matching part and a second matching part, the first matching part being slidably connected with the second movable cavity, one end of the first matching part being fixedly connected with the wedge-shaped movable block, the other end of the first matching part being connected with the second matching part, the second matching part being movably connected with the third movable cavity, wherein the connecting block and the third movable cavity enclose a return chamber; the reel has a return flow channel, the return flow channel being in fluid communication with the return chamber, and the return flow channel being used for conveying fluid to the return chamber to drive the connecting block to displace towards the receiving cavity.

4. The reel according to claim 3, wherein: the return flow channel comprises a first channel and a second channel; the main shaft is provided with the first channel; the connecting piece is provided with the second channel, one end of the second channel being in communication with the first channel, and the other end of the second channel being connected with the end surface of the return chamber away from the receiving cavity.

5. A roll dispensing / reeling shaft according to claim 4, characterised in that, the reel comprises a rotary joint and a shaft-to-shaft sealing element; the rotary joint is rotatably connected with one end of the main shaft away from the tensioning chuck, the rotary joint being provided with an annular cavity, the first channel being in fluid communication with the annular cavity; the shaft-to-shaft sealing element is arranged between the rotary joint and the main shaft and located at least one side of the annular cavity.

6. A roll dispensing / reeling shaft according to claim 5, wherein the reel further comprises a gas supply device, an output end of the gas supply device being connected with the rotary joint, and the gas supply device being used for conveying gas to the annular cavity.

7. The roll dispensing / reeling shaft of claim 5 wherein, the main shaft is provided with a third channel, one end of the third channel being connected with the receiving cavity, and the third channel being coaxially arranged with the main shaft; the reel comprises a wire tube and a conductive slip ring; the wire tube is arranged in the third channel, and a wire harness of the electro-hydraulic pressure boosting cylinder is arranged in the wire tube. The conductive slip ring is arranged at an end of the main shaft away from the expansion chuck, and the conductive slip ring comprises a rotor end and a stator end, the rotor end is arranged in the third channel, and the wiring end of the wire harness is electrically connected with the rotor end.

8. The reel according to claim 7, wherein, The overline tube and the third channel have a gap therebetween, and the first channel and the annular cavity are respectively communicated with the gap; The reel comprises a first sealing member and a second sealing member, the first sealing member is arranged between the overline tube and the third channel, and the first sealing member is located at an end of the overline tube close to the accommodating cavity, the second sealing member is arranged between the overline tube and the third channel, and the second sealing member is located at an end of the overline tube away from the accommodating cavity.

9. The roll dispensing / reeling shaft of claim 1 wherein, Further comprising a bearing assembly, and the main shaft is externally rotatably connected with the bearing assembly.

10. A roll-fed apparatus characterized by, The reel comprises the reel according to any one of claims 1 to 9.

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