Yarn roll tensioning device

Abstract

The utility model belongs to the technical field of yarn roll processing equipment, and particularly relates to a yarn roll tensioning device. The yarn roll tensioning device comprises an air bag, a tail plug, an air inlet plug, a shaft sleeve, a shaft end cover, a key strip and a spring piece, two openings are formed in the two opposite ends of the air bag respectively, the tail plug covers one opening in a sealing mode, the air inlet plug covers the other opening in a sealing mode, the shaft sleeve is arranged on the air bag in a sleeving mode, and the key strip is arranged on the air bag. A plurality of notches evenly distributed in the circumferential direction of the shaft sleeve are formed in the shaft sleeve, at least one key strip is arranged at the position of each notch, one side of each key strip is connected with the outer wall of the air bag through the corresponding notch, and the air inlet plug is provided with an air inlet channel communicated with an inner cavity of the air bag. One end of the spring piece is connected with the air bag, and the other opposite end of the spring piece is connected with the key bar; according to the utility model, loading and unloading of the yarn roll tensioning device can be facilitated.

Description

Technical Field

[0001] This utility model belongs to the technical field of yarn roll processing equipment, specifically a yarn roll tensioning device. Background Technology

[0002] When processing yarn rolls using yarn roll processing equipment, a feeding process is required first, in which the yarn roll is fixed on the outer wall of a rotating shaft. However, the outer diameter of the rotating shaft is currently fixed, so the inner wall size of the yarn roll often differs too much from the outer diameter of the rotating shaft. If the inner diameter of the yarn roll exceeds the outer diameter of the rotating shaft, it is difficult to fix the yarn roll on the rotating shaft and rotate with it. If the inner diameter of the yarn roll is smaller than the outer diameter of the rotating shaft, it is difficult to install the yarn roll on the rotating shaft or remove it from the rotating shaft. Therefore, loading and unloading on the rotating shaft is currently quite difficult, and the installed yarn roll is also difficult to adjust. Utility Model Content

[0003] In view of this, the present invention provides a yarn roll tensioning device to solve the technical problem of difficult feeding and unloading of yarn roll tensioning devices in the prior art.

[0004] The first aspect of this utility model provides a yarn roll tensioning device, comprising an airbag, a tail plug, an air inlet plug, a bushing, a shaft end cap, a key strip, and a spring plate. The airbag has two openings at opposite ends. The tail plug covers one opening, and the air inlet plug covers the other opening. The bushing is fitted onto the airbag and has several notches evenly arranged along its circumference. At least one key strip is located at each notch. One side of the key strip is connected to the outer wall of the airbag through the notch. The air inlet plug has an air inlet channel communicating with the inner cavity of the airbag. One end of the spring plate is connected to the airbag, and the opposite end is connected to the key strip.

[0005] Preferably, it further includes a rotating shaft and a shaft connecting seat, wherein the shaft connecting seat is connected to the bushing at the end of the bushing away from the tail plug, and the rotating shaft is connected to the shaft connecting seat.

[0006] Preferably, the shaft connecting seat is provided with a first abutting surface and a second abutting surface. The second abutting surface is located on the side of the first abutting surface away from the tail plug. The second abutting surface abuts against the end of the bushing away from the tail plug. The second abutting surface extends into the bushing. The end of the rotating shaft facing the air inlet plug is provided with a flange extending in the radial direction of the rotating shaft. The shaft connecting seat is connected to the bushing through a threaded connector. The first abutting surface extends from the section of the flange away from the air inlet plug, abutting the end of the flange away from the shaft connecting seat against the end of the air inlet plug.

[0007] Preferably, the rotating shaft is provided with a first connecting key and a second connecting key. The first connecting key is located in the shaft connecting seat and drives the shaft connecting seat to the rotating shaft. The second connecting key is located on the side of the shaft connecting seat away from the air intake plug.

[0008] Preferably, the first connecting key and the second connecting key are at the same circumferential position on the rotating shaft.

[0009] Preferably, the center of the rotating shaft is provided with a vent hole that runs through the rotating shaft in the axial direction, and one end of the vent hole is connected to the air intake channel of the air intake plug.

[0010] Preferably, an inflation connector is provided at the end of the rotating shaft away from the air inlet plug. The inflation connector includes a first connecting part and a second connecting part. The first connecting part is connected to the rotating shaft, and the second connecting part is used to communicate with an air source. The axial direction of the first connecting part is parallel to the axial direction of the rotating shaft, and the axial direction of the second connecting part is perpendicular to the circumferential direction of the first connecting part. The second connecting part and the second connecting key are offset from each other in the circumferential position of the rotating shaft.

[0011] Preferably, the key bar has a groove recessed in the middle towards the airbag.

[0012] Preferably, the spring sheet is disposed in the groove, the spring sheet is inclined relative to the axis of the airbag, and the radial distance between the end of the spring sheet away from the groove and the axis of the airbag is greater than the radial distance between the end of the spring sheet near the groove and the axis of the airbag.

[0013] Preferably, it further includes a shaft end cap, which is disposed on the end of the bushing away from the air intake plug and connected to the bushing. The end of the tail plug away from the air intake plug is provided with a blind hole. The middle part of the shaft end cap is provided with a protrusion extending toward the air intake plug, and at least a portion of the protrusion is located in the blind hole.

[0014] Beneficial Effects: This utility model's yarn roll tensioning device involves fitting a bushing onto an inflatable and deflated airbag. Several key strips are evenly arranged circumferentially at the notch in the bushing. The airbag's tail and head are respectively plugged with a tail plug and an air inlet plug. When the airbag is inflated, its expansion drives the key strips to extend outwards and make close contact with the inner wall of the yarn roll, thus easily fixing the yarn roll to the tensioning device. The tension of the yarn roll can also be easily adjusted by changing the gas pressure within the airbag. When the gas is released from the airbag, it contracts, and the spring plates on the airbag return to their original shape, quickly retracting the key strips towards the airbag, thus rapidly separating the key strips from the yarn roll. At this point, the yarn roll can be easily removed from the tensioning device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0016] Figure 1 This is a front view of the yarn roll tensioning device of this utility model;

[0017] Figure 2 This is a cross-sectional view of the yarn roll tensioning device of this utility model;

[0018] Figure 3 This is a partial sectional view of the location of the shaft connecting seat of the yarn roll tensioning device of this utility model;

[0019] Figure 4 Right view of the yarn roll tensioning device of this utility model;

[0020] Figure 5 A partial sectional view of the shaft end cap position of the yarn roll tensioning device of this utility model;

[0021] Figure 6 This is a left view of the yarn roll tensioning device of this utility model.

[0022] The components and their numbers shown in the picture:

[0023] Shaft connecting seat 1, first abutment surface 11, second abutment surface 12, shaft sleeve 2, shaft end cover 3, protrusion 31, air inlet plug 4, air inlet channel 41, air bag 5, tail plug 6, blind hole 61, key strip 7, groove 71, spring plate 8, rotating shaft 9, flange 91, first connecting key 92, second connecting key 93, vent hole 94, inflation connector 95, first connecting part 951, second connecting part 952. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. It should be noted that, in this document, relational terms such as "first" and "second" 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. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0025] Example 1

[0026] like Figure 1 and Figure 2 As shown, this embodiment provides a yarn roll tensioning device, which includes an airbag 5, a tail plug 6, an air inlet plug 4, a bushing 2, a shaft end cap 3, a key strip 7, and a spring plate 8. The airbag 5 has two openings at opposite ends. The tail plug 6 covers one opening, and the air inlet plug 4 covers the other opening. The bushing 2 is fitted onto the airbag 5. The bushing 2 has several notches evenly arranged along the circumferential direction of the bushing 2. At least one key strip 7 is provided at each notch position. One side of the key strip 7 is connected to the outer wall of the airbag 5 through the notch. The air inlet plug 4 is provided with an air inlet channel 41 that communicates with the inner cavity of the airbag 5. One end of the spring plate 8 is connected to the airbag 5, and the opposite end is connected to the key strip 7.

[0027] The air bladder 5 is the core component of the air-expanding shaft. It can be inflated through the air intake channel 41 connected to the inner cavity of the air bladder 5 via the air intake plug 4, or the gas in the air bladder 5 can be expelled through the air intake plug 4. When inflated, the air bladder 5 expands; when the gas is expelled, it contracts. The air bladder 5 can adapt to different core diameters and slight variations, increasing the versatility of the equipment. The inflation method of the air bladder 5 ensures uniform pressure distribution, avoiding localized damage to the inner wall of the core. Damaged air bladder 5 can be replaced individually, making maintenance convenient and cost-effective. The bushing 2 is located on the outer layer of the air bladder 5, supporting the entire shaft and providing a base for fixing and guiding the key bar 7. In this embodiment, the bushing 2 covers the outside of the air bladder 5, protecting it from direct contact with the external environment and preventing scratches or aging. The bushing 2 can be made of wear-resistant materials (such as aluminum alloy or stainless steel) and can withstand long-term friction and heavy loads. The bushing 2, through precision machining, ensures the smoothness and concentricity of the air shaft during operation. The main functions of the tail plug 6 and the air inlet plug 4 are to seal both ends of the air shaft, ensuring sealing after inflation and preventing gas leakage. In this embodiment, the air inlet plug 4 and the tail plug 6 also serve to fix the shaft body to the built-in airbag 5 and other components, ensuring the stability of the internal structure. In addition, the air inlet plug 4 can also be connected to external devices: one end of the air inlet plug 4 is usually designed with an inflation nozzle for connecting to an external air source to control inflation and deflation.

[0028] In this embodiment, the airbag 5 inflates to push the key bar 7 outward, bringing it into close contact with the inner wall of the winding core, thereby securing the core. During this process, the airbag 5 converts air pressure into mechanical force, which clamps the core by pushing the key bar 7. After deflating, the airbag 5 retracts, and the key bar 7 retracts, facilitating the disassembly of the winding core.

[0029] This embodiment utilizes the expansion of the airbag 5 and the external support structure of the key bar 7 to quickly fix the yarn roll onto the bushing 2. This design avoids manual adjustment or the use of additional tools to fix the yarn roll, improving operational efficiency. The spring plate 8 is designed to quickly pull the key bar 7 back to its original position when deflated, eliminating the need for additional manual intervention and further enhancing the convenience of loading and unloading. The automatic reset function makes the device operate more smoothly, reducing time consumption during operation. Uniform force application protects the yarn roll: the even distribution of the notch and key bar 7 ensures that the pressure applied to the inner wall of the yarn roll is uniform when the airbag 5 expands, avoiding excessive localized force that could damage the yarn roll.

[0030] The overall structure of this embodiment is compact. The combination of bushing 2, key 7, and spring plate 8 enables the device to operate efficiently in a small space. Components are easy to disassemble and assemble; damaged airbag 5, key 7, or spring plate 8 can be replaced individually, resulting in low maintenance costs. The key 7 and spring plate 8 are flexibly designed to adapt to yarn rolls of different diameters or materials, offering a wide range of applications and meeting various industrial needs. The spring plate 8 reduces the load on airbag 5, allowing it to focus solely on outputting expansion pressure, thereby reducing wear and extending its service life.

[0031] like Figure 3 As shown, the yarn roll tensioning device of this embodiment also includes a rotating shaft 9 and a shaft connecting seat 1. The shaft connecting seat 1 is connected to the shaft sleeve 2 at the end of the shaft sleeve 2 away from the tail plug 6, and the rotating shaft 9 is connected to the shaft connecting seat 1.

[0032] The rotating shaft 9 can rotate under the drive of the driving device. Since the rotating shaft 9 is connected to the shaft sleeve 2 through the shaft connecting seat 1, the rotating shaft 9 can drive the entire yarn roll to rotate when it rotates, thereby driving the yarn roll fixed on the yarn roll tensioning device to rotate.

[0033] like Figure 3 As shown, in this embodiment, the shaft connecting seat 1 is provided with a first abutting surface 11 and a second abutting surface 12. The second abutting surface 12 is located on the side of the first abutting surface 11 away from the tail plug 6. The second abutting surface 12 abuts against the end of the bushing 2 away from the tail plug 6. The second abutting surface 12 extends into the bushing 2. The end of the rotating shaft 9 facing the air intake plug 4 is provided with a flange 91 extending in the radial direction of the rotating shaft 9. The shaft connecting seat 1 is connected to the bushing 2 through a threaded connector. The first abutting surface 11 extends from the section of the flange 91 away from the air intake plug 4, and abuts the end of the flange 91 away from the shaft connecting seat 1 against the end of the air intake plug 4.

[0034] In this embodiment, the connection between the shaft connecting seat 1 and the air intake plug 4 is located in the bushing 2. The bushing 2 protects the critical connection points and improves connection reliability. This embodiment uses the first abutment surface 11 and the second abutment surface 12 of the shaft connecting seat 1 to limit the relative positions of the air intake plug 4 and the bushing 2 during installation, accurately defining their relative positions in the axial direction. Alternatively, this embodiment can reliably connect the flange 91 at the front end of the rotating shaft 9 to the air intake plug 4 and the shaft connecting seat 1 through abutment and compression, with the shaft connecting seat 1 pressing the flange 91 of the rotating shaft 9 between the air intake plug 4 and the second abutment surface 12.

[0035] In this embodiment, the rotating shaft 9 is provided with a first connecting key 92 and a second connecting key 93. The first connecting key 92 is located in the shaft connecting seat 1 and drives the shaft connecting seat 1 to the rotating shaft 9. The second connecting key 93 is located on the side of the shaft connecting seat 1 away from the air inlet plug 4. In this embodiment, the power output from the external drive device is transmitted to the rotating shaft 9 through the first connecting key 92, causing the rotating shaft 9 to rotate. The rotating shaft 9 then transmits power to the shaft connecting seat 1 through the second connecting key 93, thereby driving the entire yarn roll tensioning device to rotate together. In a specific implementation, the first connecting piece can be placed in the central hole of the shaft connecting seat 1 to protect the important parts of the transmission connection.

[0036] In this embodiment, the first connecting key 92 and the second connecting key 93 are in the same circumferential position on the rotating shaft 9, so that the power of the driving device can be reliably transmitted to the shaft connecting seat 1.

[0037] In this embodiment, a vent hole 94 is provided at the center of the rotating shaft 9, extending through the rotating shaft 9 in the axial direction. One end of the vent hole 94 is connected to the air intake channel 41 of the air intake plug 4. In this embodiment, the vent hole 94 provided on the rotating shaft 9 is used to ventilate the airbag 5, eliminating the need for additional ventilation pipes, thus simplifying the structure and further reducing costs.

[0038] like Figure 3 and Figure 4 As shown, in this embodiment, an inflation connector 95 is provided at the end of the rotating shaft 9 away from the air inlet plug 4. The inflation connector 95 includes a first connecting part 951 and a second connecting part 952. The first connecting part 951 is connected to the rotating shaft 9, and the second connecting part 952 is used to communicate with an air source. The axial direction of the first connecting part 951 is parallel to the axial direction of the rotating shaft 9, and the axial direction of the second connecting part 952 is perpendicular to the circumferential direction of the first connecting part 951. The second connecting part 952 and the second connecting key 93 are offset from each other in the circumferential position of the rotating shaft 9.

[0039] In this embodiment, the second connecting part 952 and the second connecting key 93 are offset in the circumferential direction so that the two functions of the rotating shaft 9, namely, the air filling and transmission, do not affect each other. The first connecting part 951 and the second connecting part 952 are arranged in an "L" shape to facilitate the connection of an external air source above the rotating shaft 9.

[0040] In this embodiment, the key bar 7 has a groove 71 recessed in the middle towards the airbag 5. When the airbag 5 is inflated, the groove 71 in the middle of the key bar 7 allows the key bar 7 to deform adaptively, thereby better fitting the inner wall of the yarn roll.

[0041] In this embodiment, the key bar 7 can be a rubber key bar with a steel sheet, which is composed of rubber and steel sheet, combining flexibility and rigidity. This design has the following characteristics and advantages: the rubber part gives the key bar 7 a certain degree of flexibility, which can adapt to the slight unevenness of the inner wall of the core. The steel sheet part provides rigid support, ensuring effective torque transmission even under high loads. The elastic properties of the rubber allow the key bar 7 to make more uniform contact with the inner wall of the core when it is inflated, reducing point contact or excessive local pressure. The steel sheet has good elasticity and deformation recovery performance, and the key bar 7 can quickly return to its original shape after deflation, facilitating the loading and unloading of the core. The rubber material itself is lighter, reducing the overall weight of the air shaft compared to a pure metal key bar 7, which helps to reduce the burden on the equipment.

[0042] In this embodiment, the spring plate 8 is disposed at the groove 71. The spring plate 8 is inclined relative to the axis of the airbag 5. The radial distance between the end of the spring plate 8 away from the groove 71 and the axis of the airbag 5 is greater than the radial distance between the end of the spring plate 8 near the groove 71 and the axis of the airbag 5. The spring plate 8, which is inclined at the groove 71, can quickly pull the expanded and deformed key bar 7 back into the bushing 2 after the airbag 5 is deflated.

[0043] like Figure 5 and Figure 6 As shown, the yarn tensioning device in this embodiment also includes a shaft end cap 3. The shaft end cap 3 covers the end of the bushing 2 away from the air inlet plug 4 and is connected to the bushing 2. The tail plug 6 has a blind hole 61 at the end away from the air inlet plug 4. The middle of the shaft end cap 3 has a protrusion 31 extending towards the air inlet plug 4, and at least a portion of the protrusion 31 is located in the blind hole 61. In this embodiment, the shaft end cap 3 provides support for the airbag 5. The shaft end cap 3 is connected to the end of the bushing 2 by bolts, and the airbag 5 is connected by embedding the protrusion 31 into the blind hole 61 of the tail plug 6, so that the airbag 5 is fixed in the bushing 2, making the structure more reliable.

[0044] It should be clarified that this utility model is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this utility model is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this utility model. The functional blocks shown in the above-described structural block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of this utility model are programs or code segments used to perform the required tasks. The programs or code segments can be stored in a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and so on. Code segments can be downloaded via computer networks such as the Internet and intranets. It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0045] The above description is merely a specific embodiment of this utility model. Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. A yarn roll tensioning device characterized by, The utility model provides a kind of air cylinder, including air bag, tail plug, air inlet plug, shaft sleeve, shaft end cover, key strip and spring piece, the opposite ends of the air bag are respectively provided with two openings, the tail plug covers one opening, air inlet plug covers another opening, the shaft sleeve is set on the air bag, the shaft sleeve is provided with several evenly arranged notches along the circumferential direction of shaft sleeve, at least one key strip is provided in each notch position, the outer wall of the air bag is connected with the side of the key strip by the notch, the air inlet plug is provided with air inlet channel that is connected with air bag inner cavity, one end of the spring piece is connected with the air bag, and the other end is connected with key strip.

2. The yarn roll tensioning device of claim 1, wherein Further comprising shaft and shaft connecting seat, the shaft connecting seat is connected with the shaft sleeve at the end of the shaft sleeve away from the tail plug, and the shaft is connected with the shaft connecting seat.

3. The yarn roll tensioning device of claim 2, wherein, The first abutting surface and the second abutting surface are provided on the shaft connecting seat, the second abutting surface is located on the side of the first abutting surface away from the tail plug, the second abutting surface abuts with the end of the shaft sleeve away from the tail plug, the second abutting surface extends into the shaft sleeve, the end of the shaft towards the air inlet plug is provided with a flange extending in the radial direction of the shaft, the shaft connecting seat is connected with the shaft sleeve through a threaded connecting piece, and the first abutting surface is from the flange to the air inlet plug in a section, so that the end of the flange away from the shaft connecting seat abuts with the end of the air inlet plug.

4. The yarn roll tensioning device of claim 3, wherein, The first connecting key and the second connecting key are provided on the shaft, the first connecting key is located in the shaft connecting seat and drives the shaft connecting seat and the shaft in transmission, and the second connecting key is located on the side of the shaft connecting seat away from the air inlet plug.

5. The yarn roll tensioning device as claimed in claim 4, wherein The circumferential positions of the first connecting key and the second connecting key on the shaft are the same.

6. The yarn roll tensioning device of claim 4, wherein, The center of the shaft is provided with a ventilation hole penetrating through the shaft in the axial direction, and one end of the ventilation hole is connected with the air inlet channel of the air inlet plug.

7. The yarn roll tensioning device of claim 4, wherein, The end of the shaft away from the air inlet plug is provided with a gas filling connector, the gas filling connector includes a first connecting part and a second connecting part, the first connecting part is connected with the shaft, the second connecting part is used for communicating with a gas source, the axial direction of the first connecting part is parallel to the axial direction of the shaft, the axial direction of the second connecting part is perpendicular to the circumferential direction of the first connecting part, and the circumferential positions of the second connecting part and the second connecting key on the shaft are staggered.

8. The yarn roll tensioning device of claim 1, wherein, The middle part of the key strip is provided with a groove recessed towards the air bag.

9. The yarn roll tensioning device of claim 8, wherein The spring piece is provided at the groove, the spring piece is inclined to the axis of the air bag, and the distance between the end of the spring piece away from the groove and the axis of the air bag in the radial direction is greater than the distance between the end of the spring piece close to the groove and the axis of the air bag in the radial direction.

10. The yarn roll tensioning device according to any one of claims 1 to 9, characterized in that Further comprising a shaft end cover, the shaft end cover covers the end of the shaft sleeve away from the air inlet plug and is connected with the shaft sleeve, the end of the tail plug away from the air inlet plug is provided with a blind hole, the middle part of the shaft end cover is provided with a protrusion extending towards the air inlet plug, and at least a part of the protrusion is located in the blind hole.

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