Automatic yarn lifting device for rotor spinning machine

Abstract

The utility model relates to an automatic yarn lifting device for a rotor spinning machine. The automation requirement of rotor spinning is gradually increased, and in the conversion process from whole-shaft transmission to single-spindle control, the inconvenience that yarn and a yarn guide nozzle are not separated during yarn jointing exists. The device comprises a yarn guide nozzle, a winding friction roller, a threaded air cylinder, a lead screw, a tension spring and the like, through the structural design that an action part of the threaded air cylinder abuts against the lead screw and the like, seed yarn is separated from the yarn guide nozzle before yarn jointing, and the yarn rapidly enters the yarn guide nozzle to be normally guided after jointing. Compared with the prior art, the device has the advantages of being sensitive and accurate in air cylinder pushing response, high in working stability, compact in structure, suitable for space limited positions, capable of saving energy, beneficial to repair and maintenance, capable of saving cost, convenient to operate, wide in applicability, capable of improving the cleaning degree of the whole machine and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotor spinning equipment, in particular to an automatic yarn lifting device for a rotor spinning machine. Background Art

[0002] Rotor spinning plays a vital role in the textile industry and is a key link in the textile supply chain. In today's society, with the booming global economy and the rapid advancement of science and technology, the entire textile industry is moving towards automation and intelligentization. Rotor spinning is no exception, and the requirements for automation are increasing day by day.

[0003] In current rotor spinning technology applications, semi-automatic rotor spinning machines are a common type of equipment. The winding friction rollers of these machines utilize a full-shaft drive. This drive system dictates a specific workflow for yarn piecing. Specifically, when the yarn needs to be pieced, the yarn lifter is raised, separating the package from the winding friction rollers. During this process, the yarn does not enter the yarn guide nozzle. Only after the piecing operation is complete does the yarn lifter drop, allowing the yarn to pass through the yarn guide nozzle and begin the back-and-forth yarn feeding process.

[0004] With the advancement of automation, the rotor spinning industry is gradually moving towards single-spindle control. Winding friction rollers driven by single-spindle motors are gradually replacing traditional full-shaft transmission systems. This shift offers numerous advantages, particularly in yarn piecing. When single-spindle controlled winding friction rollers are used, if a package breaks and piecing is required, each winding friction roller can be individually controlled, simply stopping the roller on that spindle to achieve the desired piecing. This eliminates the need for the winding friction rollers to separate from the package, as is required with full-shaft transmission, and eliminates the need for the yarn lifter mechanism that is essential in full-shaft transmission. However, it is worth noting that while the relationship between the winding friction rollers and the package changes in this approach, the existing traverse guide mechanism remains unchanged. Since the yarn is not separated from the yarn guide during piecing, this presents a significant challenge. Therefore, a dedicated mechanism is urgently needed to ensure that the yarn is separated from the yarn guide, facilitating piecing operations and meeting the new demands of rotor spinning automation. Utility Model Content

[0005] In view of this, the utility model aims to propose an automatic yarn lifting device for a rotor spinning machine. This device overcomes the above shortcomings and provides a device with a reasonable structural design. The device can separate the seed yarn from the yarn guide nozzle before the yarn joint is completed, and after the yarn joint action is completed, the yarn can be quickly allowed to enter the yarn guide nozzle, thereby realizing the normal yarn guiding function.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] An automatic yarn lifting device for a rotor spinning machine includes a yarn guide nozzle, a winding friction roller, a threaded cylinder, a screw rod, and a tension spring. The winding friction roller is fixed to a wall panel of an external device and is rotatable. The paper tube is arranged tangentially to the winding friction roller. The yarn guide nozzle is arranged obliquely above the winding friction roller. The yarn outlet of the yarn guide nozzle is opposite to the winding friction roller. The screw rod is movably arranged above the yarn guide nozzle and can be close to or away from the yarn guide nozzle. The threaded cylinder is arranged on one side of the winding friction roller. One end of the tension spring is connected to the screw rod, and the other end of the tension spring is fixed to an inactive part. The inactive part can be a wall panel of an external device or the shell of other equipment. The inactive part provides a fixing point for the tension spring, and the actuating part of the threaded cylinder abuts against the screw rod. When the threaded cylinder extends, it pushes up the screw rod, thereby separating the yarn from the yarn guide nozzle. At this time, the tension spring is also in a stretched state. After the joint is completed, the threaded cylinder retracts, and the tension spring retracts at the same time. The screw rod is also pulled back under the action of the tension spring, and then the yarn contacts the yarn guide nozzle and is wound on the paper tube under the action of traverse and friction roller.

[0008] In a structure that optimizes the aforementioned solution, the screw rod includes a yarn-supporting rod and a top plate. The yarn-supporting rod is movably disposed above the yarn guide nozzle. The top plate is fixedly connected to the yarn-supporting rod. One end of a tension spring is connected to the top plate. The actuating portion of a threaded cylinder abuts against the top plate. The threaded cylinder extends and retracts, pushing up the top plate, thereby driving the movement of the yarn-supporting rod.

[0009] Furthermore, a small hole is formed at the bottom of the top plate, and one end of a tension spring is fixed to the small hole at the bottom of the top plate. The tension spring is connected to the bottom of the top plate to increase the retraction force arm. After the threaded cylinder retracts, the tension spring can drive the screw rod to retract quickly.

[0010] One structure that optimizes the aforementioned solution also includes a push block, which is fixed to the actuating portion of the threaded cylinder. When installed, the push block is aligned with the top plate of the screw, abutting the top plate. The threaded cylinder uses the push block to push the top plate of the screw, converting the linear motion of the threaded cylinder into rotational motion of the screw. This lifts the screw's yarn support rod from its initial position to allow yarn release. By varying the size of the push block, the stroke of the push plate, and thus the height of the screw's lift, can be varied.

[0011] One structure that optimizes the aforementioned solution also includes a tension compensation bow, located behind the yarn guide. Installed on an external device, the bow supports the yarn to provide tension compensation for winding, or serves as a fulcrum for the yarn when the lead screw lifts the yarn, providing tension support.

[0012] Furthermore, at least a portion of the tension compensation bow is in the same plane as the yarn outlet of the yarn guide nozzle. The above structure helps the tension compensation bow to provide a certain tension and support for the yarn when the screw is lifted or lowered.

[0013] In a structure that can optimize the above-mentioned solution, it also includes two nylon sleeves, which are arranged at both ends of the yarn supporting rod to movably fix the yarn supporting rod to the wall panel of the external equipment.

[0014] In a structure that can optimize the above-mentioned solution, the threaded cylinder is mounted on the external equipment wall panel through a fixed angle iron, and the other end of the tension spring is fixed to the fixed angle iron.

[0015] Compared with the prior art, the automatic yarn lifting device for the rotor spinning machine described in the utility model has the following advantages:

[0016] 1. Sensitive and precise response: The cylinder is directly pushed, which makes the time response more sensitive. The response time can be changed arbitrarily to achieve more precise control, thus ensuring that the device can work promptly and accurately during the yarn joint operation.

[0017] 2. High working stability: The cylinder has a large thrust, which effectively avoids jamming and misalignment during operation, ensures the smooth operation of yarn joints, and improves the stability of the entire spinning process.

[0018] 3. Compact structure: The device has a simple and compact structure, which is particularly suitable for installation and use in places with limited space. It will not take up too much space, which is a great advantage for environments with compact layout of textile equipment.

[0019] 4. Energy saving: During the normal spinning process, the cylinder is in a closed state. This working mode reduces energy loss, meets the requirements of energy conservation and emission reduction, and helps reduce production costs.

[0020] 5. Conducive to maintenance and cost savings: The equipment structure is simplified, and the simple structure makes maintenance more convenient and quick. It also reduces the number of equipment parts, saves production costs, and brings benefits to the enterprise in terms of equipment maintenance and cost management.

[0021] 6. Operation and applicability advantages: It is easy to operate, has simple and flexible control, can be used on a variety of equipment, and has a wide range of applicability. In addition, the simplified equipment structure can improve the cleanliness of the entire machine, help maintain a good working environment, and reduce the impact of impurities on spinning quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a structural schematic diagram of the automatic yarn lifting device for the rotor spinning machine according to the utility model;

[0024] Figure 2 This is a structural perspective view of the automatic yarn lifting device for the rotor spinning machine according to the utility model;

[0025] Figure 3 This is an enlarged view of the partial structure of the automatic yarn lifting device for the rotor spinning machine of the utility model;

[0026] Figure 4 This is a disassembled diagram of the structure of the automatic yarn lifting device for the rotor spinning machine according to the utility model;

[0027] Figure 5 This is a schematic diagram of the threaded cylinder in the open state of the utility model;

[0028] Figure 6 This is a schematic diagram of the threaded cylinder in the closed state of the utility model.

[0029] Description of reference numerals:

[0030] 1. Paper tube, 2. Yarn guide nozzle, 3. Winding friction roller, 4. Nylon sleeve, 5. Threaded cylinder, 6. Screw, 7. Tension compensation bow, 8. Tension spring, 9. Yarn, 10. Top block;

[0031] 6-1, yarn supporting rod, 6-2, top plate. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0036] A mounting structure for an automatic yarn lifting device for a rotor spinning machine securely fixes a winding friction roller 3 to an external equipment wall panel of the rotor spinning machine to ensure its flexible rotation. According to design requirements, a yarn guide nozzle 2 is installed obliquely above the winding friction roller 3, so that the yarn outlet of the yarn guide nozzle 2 is opposite to the winding friction roller 3, so that the yarn can be smoothly guided from the yarn guide nozzle 2 to the winding friction roller 3. A paper tube 1 is installed on the rotor spinning machine so that the paper tube 1 and the winding friction roller 3 are arranged tangentially. In this way, during the yarn winding process, the yarn can be smoothly wound onto the paper tube 1 driven by the winding friction roller 3. A screw rod 6 is installed, which includes a yarn support rod 6-1 and a top plate 6-2. Nylon sleeves 4 are installed at both ends of the yarn support rod 6-1. The yarn support rod 6-1 is movably fixed to the external equipment wall panel via the nylon sleeves 4, so that the screw rod 6 can be moved close to or away from the yarn guide nozzle 2. Install a tension compensation bow 7 at the rear of the yarn guide nozzle 2, ensuring that at least a portion of the bow 7 is flush with the yarn outlet of the yarn guide nozzle 2. Mount the threaded cylinder 5 on the external equipment wall panel using a fixed angle iron. Install a top block 10 on the operating portion of the threaded cylinder 5, ensuring that the top block 10 is aligned with the top plate 6-2 of the screw rod 6 during installation. Secure one end of a tension spring 8 to the small hole at the bottom of the top plate 6-2, and the other end of the tension spring 8 to the fixed angle iron. The fixed angle iron provides a fixed point for the tension spring 8, and the operating portion of the threaded cylinder 5 abuts against the top plate 6-2 via the top block 10.

[0037] Normal working state during yarn winding process: Figure 6 As shown, yarn 9 passes through tension compensation bow 7 and is guided out of the yarn outlet of yarn guide 2. It then contacts winding friction roller 3. Under the action of the traverse device (not mentioned but present in actual rotor spinning machines) and winding friction roller 3, yarn 9 begins to be wound around paper tube 1, which is arranged tangentially to winding friction roller 3. At this time, screw rod 6 is in its initial position, yarn 9 is in normal contact with yarn guide 2, tension spring 8 is in its natural state, and threaded cylinder 5 is in its retracted state.

[0038] Yarn piecing operations:

[0039] When yarn splicing operation is required: Figure 5 As shown, the threaded cylinder 5 is activated and extends, and the top block 10 of its operating portion lifts the top plate 6-2 of the screw rod 6, thereby driving the yarn support rod 6-1 upward, causing the yarn 9 to separate from the yarn guide nozzle 2. During this process, the tension spring 8 is stretched. Because at least a portion of the tension compensation bow 7 is coplanar with the yarn outlet of the yarn guide nozzle 2, when the yarn 9 separates from the yarn guide nozzle 2, the tension compensation bow 7 serves as one of the fulcrums of the yarn 9, providing tension support for the yarn 9 and preventing the yarn 9 from becoming loose or tangled when it leaves the yarn guide nozzle 2.

[0040] Performing yarn splicing operation: When the yarn 9 is separated from the yarn guide nozzle 2, the operator performs the yarn splicing operation.

[0041] Operation after the joint is completed:

[0042] After the joint is completed, the threaded cylinder 5 retracts and the tension spring 8 also begins to retract due to its own elasticity. The screw rod 6 is pulled back to its initial position by the tension spring 8. At this time, the yarn 9 contacts the yarn guide nozzle 2 again. The yarn 9 continues to be wound on the paper tube 1 under the action of the traverse and the winding friction roller 3, completing the yarn lifting and resetting operations in the entire yarn joint process. The device returns to Figure 6 Status shown.

[0043] Through the above embodiments, the automatic yarn lifting device for the rotor spinning machine can effectively realize the separation and closing of the yarn 9 and the yarn guide nozzle 2, is suitable for the winding friction roller controlled by a single spindle, and there is no need to separate the bobbin yarn from the friction roller when the yarn is connected. It is easy to operate and has a simple structure.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic yarn lifting device for a rotor spinning machine, characterized in that: The invention comprises a yarn guide nozzle (2), a winding friction roller (3), a threaded cylinder (5), a screw rod (6), and a tension spring (8). The winding friction roller (3) is fixed on an external equipment wall panel, the yarn guide nozzle (2) is arranged obliquely above the winding friction roller (3), the screw rod (6) is movably arranged above the yarn guide nozzle (2), the threaded cylinder (5) is arranged on one side of the winding friction roller (3), one end of the tension spring (8) is connected to the screw rod (6), and the other end of the tension spring (8) is fixed to the non-movable part, and the action part of the threaded cylinder (5) is in contact with the screw rod (6).

2. The automatic yarn lifting device for a rotor spinning machine according to claim 1, characterized in that: The screw rod (6) comprises a yarn supporting rod (6-1) and a top plate (6-2); the yarn supporting rod (6-1) is movably arranged above the yarn guide nozzle (2); the top plate (6-2) is fixedly connected to the yarn supporting rod (6-1); one end of the tension spring (8) is connected to the top plate (6-2); and the action part of the threaded cylinder (5) abuts against the top plate (6-2).

3. The automatic yarn lifting device for a rotor spinning machine according to claim 2, characterized in that: A small hole is opened at the bottom end of the top plate (6-2), and one end of the tension spring (8) is fixed on the small hole at the bottom end of the top plate (6-2).

4. The automatic yarn lifting device for a rotor spinning machine according to claim 2, characterized in that: It also includes a top block (10), which is fixed on the action part of the threaded cylinder (5), and the top block (10) is in contact with the top plate (6-2).

5. The automatic yarn lifting device for a rotor spinning machine according to claim 2, characterized in that: It also includes a tension compensation bow (7), which is arranged at the rear of the yarn guide nozzle (2).

6. The automatic yarn lifting device for a rotor spinning machine according to claim 5, characterized in that: At least a portion of the tension compensation bow (7) is located in the same plane as the yarn outlet of the yarn guide nozzle (2).

7. The automatic yarn lifting device for a rotor spinning machine according to claim 2, characterized in that: It also includes two nylon sleeves (4), which are arranged at both ends of the yarn supporting rod (6-1) to movably fix the yarn supporting rod (6-1) on the wall panel of the external equipment.

8. The automatic yarn lifting device for a rotor spinning machine according to claim 1, characterized in that: The threaded cylinder (5) is mounted on an external equipment wall panel via a fixed angle iron, and the other end of the tension spring (8) is fixed to the fixed angle iron.

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