Yarn gripper for spinning

Abstract

The utility model discloses a yarn gripper for spinning. The yarn gripper comprises a base, a magnetic conduction assembly, an execution assembly, a second yarn gripping sheet, a feeding adjusting piece, a front positioning ring, an electromagnetic coil, a buffer ring and a lubricating sleeve. The magnetic conductive assembly comprises a magnet yoke, a rear magnetic cover and an iron core. The rear magnetic cover is coaxially fixed at one end of the magnetic yoke, the lubricating sleeve is embedded and fixed in the iron core, the iron core sequentially penetrates through the rear magnetic cover, the electromagnetic coil and the front positioning ring, and the feeding adjusting part is coaxially installed on a thread adjusting pair part of the iron core; the execution assembly comprises a guide spring core, a reset spring and a yarn pressing power assembly. The magnetic conduction assembly is coaxially installed on the base, and the second yarn clamping piece is coaxial with the magnetic conduction assembly and fixed in a second yarn pressing positioning part of the base. The yarn gripper has the advantages of being adjustable in yarn pressing force, convenient to install, capable of achieving self-cleaning, high in response speed and the like.

Description

Technical Field

[0001] The utility model relates to the field of textiles, in particular to a yarn gripper for textiles. Background Art

[0002] The yarn gripper for textile is used in water jet looms and air jet looms. Currently, the yarn gripper has the following disadvantages, as follows:

[0003] 1. The installation is not completely coaxial.

[0004] The first and second yarn pressing assemblies in the power actuator assembly of this yarn gripper are installed separately. To ensure basic coaxiality, they need to be adjusted step by step. This installation method is not only cumbersome but also cannot guarantee that the weft yarn is fully clamped. If it is not fully clamped, further manual adjustment is required.

[0005] 2. The yarn pressing force cannot be adjusted flexibly.

[0006] Current yarn grippers adjust the yarn pressing force by moving the power actuator. However, changing the position of the actuator to adjust the yarn pressing force not only changes the yarn pressing stroke but also affects the response speed. For example, changing the yarn pressing stroke from 2mm to 4mm increases the yarn pressing force, but reduces the electromagnetic suction force, extending the yarn pressing time. This adjustment method requires disassembling the entire yarn gripper, which also introduces certain difficulties in coaxial installation.

[0007] 3. The yarn pressing return spring cannot be replaced.

[0008] Since the current return spring is fixed in the actuator assembly and cannot be easily disassembled, it brings great inconvenience to the adjustment of the yarn pressing force for some special types of yarn. Utility Model Content

[0009] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a yarn gripper for textile use.

[0010] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a yarn gripper for textile, comprising a base, a magnetic conductive component, an actuator component, a second yarn gripper, a feed adjustment member, a front positioning ring, an electromagnetic coil, a buffer ring, and a lubricating sleeve;

[0011] The magnetic conductive component includes a magnetic yoke, a rear magnetic cover, and an iron core; the rear magnetic cover is coaxially fixed to one end of the magnetic yoke, the lubricating sleeve is embedded in and fixed to the iron core, and the iron core passes through the rear magnetic cover, the electromagnetic coil, and the front positioning ring in sequence, and the feed adjustment part is coaxially installed on the threaded adjustment part of the iron core;

[0012] The buffer ring is installed on the inner wall of the other end of the yoke. It is used to cushion the yarn pressing power component when the electromagnetic coil is energized, preventing the iron core and the valve cover from violently impacting each other. At the same time, it helps to reduce noise.

[0013] Among them, the actuator includes a guide spring core, a return spring, and a yarn pressing power assembly; the guide spring core, the return spring, and the yarn pressing power assembly are installed in the lubricating sleeve in sequence; the function of the guide spring core is to support the return spring and prevent the return spring from further wear; the function of the lubricating sleeve is to further reduce friction resistance and improve the response speed of the actuator.

[0014] The magnetic conductive component is coaxially mounted on the base, and the second yarn clamping piece is coaxial with the magnetic conductive component and fixed in the second yarn pressing positioning portion of the base.

[0015] In the above-mentioned yarn gripper for textile use, the yarn pressing power assembly comprises a guide rod, a valve cover, and a first yarn gripping piece; the first yarn gripping piece and the guide rod are coaxially fixed in the valve cover.

[0016] In the above-mentioned textile yarn clamp, an axial hole matching the guide rod is provided at the center of the valve cover, and a first yarn pressing positioning portion matching the first yarn clamping piece and coaxial with the axial hole is provided at one end of the valve cover; a magnetic receiving area matching the magnetic attraction area of the iron core is provided at the other end of the valve cover.

[0017] In the above-mentioned textile yarn clamp, a guide sleeve matching the lubricating sleeve is provided in the center of the iron core, the threaded adjustment sub-part is arranged at one end of the guide sleeve, and a magnetic attraction area is provided at the other end of the guide sleeve. The outer wall of the guide sleeve forms the outer side wall of the magnetic core matching the electromagnetic coil.

[0018] In the above-mentioned yarn gripper for textile use, an electromagnetic positioning groove coaxial with and matching the magnetic conductive component is provided on the base, and a second yarn pressing positioning portion is provided on one side of the electromagnetic positioning groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The base adopted by the utility model realizes the coaxiality of the magnetic conductive component, the execution component and the second yarn pressing piece through the electromagnetic positioning groove and the second yarn pressing positioning part, which greatly facilitates the installation.

[0021] This utility model adjusts the compression stroke of the return spring by shifting the feed adjustment member on the threaded adjustment sub-section of the iron core, further adjusting the yarn pressing force. Different yarn pressing forces can be set for different weft yarn types, greatly facilitating user adjustments. Furthermore, the return spring can be replaced with one of varying spring stiffnesses to adjust the yarn pressing force.

[0022] The utility model further reduces the collision force between the yarn pressing power component and the iron core through the buffer ring, thereby increasing the service life of the yarn clamp; at the same time, it is also beneficial to noise reduction.

[0023] The utility model also reduces the friction of the guide spring core, the guide rod and the return spring in the lubricating sleeve through the lubricating sleeve, thereby further improving the service life of the yarn gripper. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the external structure of the utility model;

[0027] Figure 3 This is a schematic structural diagram of the base in the present utility model;

[0028] Figure 4 This is a schematic structural diagram of the magnetic conductive component in the utility model;

[0029] Figure 5 for Figure 4 The enlarged schematic diagram of II in the middle;

[0030] Figure 6 It is a structural diagram of the skeleton in the utility model;

[0031] Figure 7 This is a schematic structural diagram of the guide spring core in the utility model;

[0032] Figure 8 This is a schematic structural diagram of the medium-pressure yarn power assembly of the utility model;

[0033] Figure 9 It is a structural schematic diagram of the valve cover in the yarn pressing assembly.

[0034] In the figure,

[0035] 1-base, 101-electromagnetic positioning slot, 102-second yarn pressing positioning part, 103-yarn pressing positioning hole, 104-ceramic hole;

[0036] 2- yoke;

[0037] 3- Rear magnetic cover;

[0038] 4- iron core, 401- guide sleeve, 402- threaded adjustment sub-part, 403- magnetic attraction area, 404- outer wall of the core;

[0039] 51-frame, 5101-coil axis hole, 5102-first baffle, 5103-lead hole, 5104-second baffle;

[0040] 52-winding,

[0041] 6-Front positioning ring,

[0042] 7-valve cover, 701-first yarn pressing positioning part, 702-axial hole, 703-magnetic receiving area;

[0043] 8-first clamping piece;

[0044] 9- second clamping piece;

[0045] 10-guide rod;

[0046] 11-return spring;

[0047] 12-lubricating sleeve;

[0048] 13-spring guide core, 1301-spring mounting portion, 1302-guide portion;

[0049] 14-feed adjustment member;

[0050] 15-subdivision dial;

[0051] 16-Fixing studs;

[0052] 17-buffer ring;

[0053] 18-Porcelain eyes. DETAILED DESCRIPTION

[0054] The present invention will be described in detail below with reference to the accompanying drawings and exemplary embodiments. The following detailed description of the present invention is for illustrative purposes only and is by no means intended to limit the present invention and its applications or uses.

[0055] Reference Figure 1 , and combined with Figures 2 to 9 As shown, the connection mode of each component of the textile yarn gripper of the present invention is further explained as follows:

[0056] A yarn gripper for textile use, mainly comprising a base 1, a magnetic conductive component, an actuator component, a second yarn gripper 9, a feed adjustment member 14, a front positioning ring 6, an electromagnetic coil, a buffer ring 17, and a lubricating sleeve 12;

[0057] The magnetic conductive assembly includes a magnetic yoke 2, a rear magnetic cover 3, and an iron core 4; the rear magnetic cover 3 is coaxially fixed to one end of the magnetic yoke 2, the lubricating sleeve 12 is embedded in and fixed to the iron core 4, and the iron core 4 passes through the rear magnetic cover 3, the electromagnetic coil, and the front positioning ring 6 in sequence. The feed adjustment member 14 is coaxially installed on the threaded adjustment sub-portion 402 of the iron core 4;

[0058] Reference Figure 6 Combine Figure 1 As shown, the electromagnetic coil described in the present invention includes a frame 51 and a winding 52. The winding 52 is mounted on the outer wall of the coil shaft hole 5101 of the frame 51. A first baffle 5102 and a second baffle 5104 are provided on both sides of the coil shaft hole 5101. The first baffle 5102 and the second baffle 5104 are used to fix the winding 52, prevent it from shifting, and ensure the shape and size stability of the winding 52. The first baffle 5102 or the second baffle 5104 is provided with a lead hole 5103, which is used to lead out and fix two wires. The two wires are respectively connected to the wire ends at the beginning and end of the winding 52.

[0059] Reference Figure 4 and Figure 5 Combined with Figure 1 As shown, the magnetic conductive component described in the present invention is further explained as follows: the yoke 2, the rear magnetic cover 3, and the iron core 4 are composed of magnetic conductive materials. The magnetic conductive component can be integrated through the process of powder alchemy, or first processed into parts through CNC machining and then assembled. The magnetic conductive material is electrical pure iron, low carbon steel, silicon steel, and 4 series stainless steel. Among them, the main function of the magnetic yoke 2 is to provide a low magnetic resistance path for the magnetic flux, guide the distribution of the magnetic field, and enhance the thickness and stability of the magnetic field. Therefore, the wall thickness of the material of the magnetic yoke 2 is more than 1mm. The magnetic yoke 2 also plays a supporting and fixing role for the iron core 4. If the magnetic conductive component is not integrated, it is preferred to weld the yoke 2, the rear magnetic cover 3, and the iron core 4 together. Since it is used in a textile environment, the magnetic conductive component is subjected to anti-corrosion treatment to increase the service life of the magnetic conductive component.

[0060] To ensure the coaxiality of the core 4 and the yoke 2 and to secure the electromagnetic coil, a pre-positioning ring 6 is inserted over the core 4 to secure the two together. This attachment method can be welding, gluing, or an overfitting method. The outer wall of the pre-positioning ring 6 contacts or has an overfitting relationship with the inner wall of the yoke 2. The pre-positioning ring 6 is made of a non-magnetic material.

[0061] The electromagnetic coil is mounted on the iron core 4 through the coil shaft hole 5101. The baffle with the lead hole 5103 of the electromagnetic coil contacts the end face of the rear magnetic cover 3, and the baffle without the lead hole 5103 contacts the end face of the front positioning ring 6.

[0062] Reference Figures 7 to 9 Combined with Figure 1 As shown, the actuator assembly of the present invention includes a guide spring core 13, a return spring 11, and a yarn pressing power assembly; the guide spring core 13, the return spring 11, and the yarn pressing power assembly are sequentially installed in the lubricating sleeve 12;

[0063] In order to support the return spring and further reduce the wear of the return spring 11, a spring mounting portion 1301 matching the inner hole of the return spring 11 is provided on the spring guide core 13;

[0064] In order to prevent the guide spring core 13 from jumping up and down under the action of the spring, a guide portion 1302 is provided on one side of the spring mounting portion 1301; the guide portion 1302 and the inner hole of the lubricating sleeve 13 are matched in a clearance fit, and the fitting clearance is between 0.01 and 0.20 mm.

[0065] In order to reduce wear and improve guiding accuracy, the head of the guide portion 1302 is spherical, triangular, or a small plane smaller than the outer circle of the guide portion 1302.

[0066] To cushion the yarn pressing power assembly when the electromagnetic coil is energized, preventing violent collisions between the iron core 4 and the valve cover 7 and reducing noise, a buffer ring 17 is installed on the inner wall of the other end of the yoke 2. This buffer ring 17 contacts the other end of the front locating ring 6 and is positioned slightly above the height of the iron core 4. The surface where the buffer ring 17 collides with the valve cover 7 is spherical, which helps improve the actuator's response speed.

[0067] In order to coaxially install the magnetic component on the base 1, refer to Figure 3 Combined with Figure 1 、 Figure 2 、 Figure 4 As shown, an electromagnetic positioning groove 101 is provided on the base 1, which is coaxial with the magnetic conductive component and coincides with the magnetic conductive component; a second yarn pressing positioning part 102 is provided on one side of the electromagnetic positioning groove 101, and a second yarn clamping piece 9 is embedded in the second yarn pressing positioning part 102.

[0068] In order to fix the magnetic conductive component on the base 1, a fixing stud 16 is welded on the outer wall of the yoke 2. At the same time, a yarn pressing positioning hole 103 is provided on the electromagnetic positioning groove 101, and the fixing stud 16 is installed in the yarn pressing positioning hole 102, and the magnetic conductive component is fixed to the base by means of a threaded connection. The base 1 described in the present invention is integrated through the injection molding process. In order to further ensure the coaxiality of the electromagnetic positioning groove 101 and the second yarn pressing positioning part 102, the electromagnetic positioning groove 101 and the second yarn pressing positioning part 102 are coaxially processed. Since the installation position is determined, the distance generated by the first yarn clamping piece 8 and the second yarn clamping piece 9 when the electromagnetic coil is energized is also determined, that is, the yarn clamping distance is determined. The yarn clamping distance is generally set to between 1 and 5 mm, but in order to ensure the response frequency, it is generally designed to be between 1 and 2 mm.

[0069] Reference Figure 4 、 Figure 5 As shown, a guide sleeve 401 is provided at the center of the iron core 4 to mate with the lubricating sleeve 12. A threaded adjustment portion 402 is provided at one end of the guide sleeve 401. The threaded adjustment portion 402 can be either internally threaded or externally threaded. If the threaded adjustment portion 402 is externally threaded, the feed adjustment member 14 is internally threaded.

[0070] The other end of the guide sleeve 401 is provided with a magnetic attraction area 403 , and the outer wall of the guide sleeve 401 forms an outer wall 404 of the magnetic core that matches the electromagnetic coil.

[0071] Reference Figures 7 to 9 As shown, the yarn pressing power assembly of the present invention comprises a guide rod 10 , a valve cover 7 , and a first yarn clamping piece 8 ; the first yarn clamping piece 8 and the guide rod 10 are coaxially fixed in the valve cover 7 .

[0072] Preferably, an axial hole 702 matching the guide rod 10 is provided in the center of the valve cover 7, and a first yarn pressing positioning portion 701 matching the first yarn clamping piece 8 and coaxial with the axial hole 702 is provided at one end of the valve cover 7; a magnetic receiving area 703 matching the magnetic attraction area 403 is provided at the other end of the valve cover 7.

[0073] In the present invention, the guide rod 10 should be between 10 and 50 mm long. A longer length will result in increased bulk, while a shorter length will result in poor coaxiality. Because the guide rod 10 is constantly in high-frequency motion, ceramic is preferred for its wear-resistant and smooth finish. Furthermore, the lubricating sleeve 12 should be made of a material that is wear-resistant and capable of withstanding long-term high temperatures of 70 to 120°C. Engineering plastics such as PEEK, PA, and POM are preferred. Self-lubricating copper alloy tubes, such as tin bronze or brass, are also acceptable.

[0074] The material used for the valve cover 7 of the present invention is a magnetic conductive material.

[0075] Based on the above, the flexible adjustment of the yarn pressing force of the utility model is further explained as follows:

[0076] Reference Figure 1 、 Figure 2 As shown, the yarn pressing force is adjusted according to the thickness and twist of the weft yarn by rotating the feed adjustment member 14. When the feed adjustment member 14 moves inward, the return spring 11 is compressed, causing the pressure of the first yarn gripper 8 fixed to the valve cover 7 on the second yarn pressing member 9 to increase. When the feed adjustment member 14 moves outward, the compression of the return spring 11 decreases, causing the pressure of the first yarn gripper 8 fixed to the valve cover 7 on the second yarn pressing member 9 to also decrease.

[0077] To provide a clear numerical understanding of the yarn pressure adjustment, a fine-scale dial 15 is fixed to the feed adjuster 14, and coarse scale lines are marked on the yoke 2. To facilitate data memorization, the pitch of the feed adjuster 14 in this utility model is set to 1mm. Each coarse scale line represents the pitch, indicating that the return spring 11 is compressed or lengthened by 1mm. Each scale line on the fine-scale dial 15 equals 1g. The number of equal parts of a turn is determined by the spring stiffness. For example, if the spring stiffness is 20g / mm, the number of equal parts is 20.

[0078] The length of the iron core 4 described in the present invention is much greater than that of the iron core of the existing yarn gripper. The long-lead iron core 4 has a relatively small magnetic resistance in the magnetic circuit, and the magnetic flux passing through the iron core 4 is large, which generates a larger magnetic force. The relatively long length of the electromagnetic coil used in the present invention further increases the magnetic force and further improves the response speed of the yarn gripper. A magnetic attraction area 403 is provided on the iron core 4 and a magnetic receiving area 703 is provided on the valve cover 7. The magnetic attraction area 403 forms a certain angle, and the angle formed by the magnetic receiving area 703 coincides with the magnetic attraction area 403, and the angle is 90° to 175°.

[0079] To position the weft yarn, a pair of ceramic holes 104 are provided on either radial side of the base 1 for mounting the ceramic eyelets 18. The center positions of the ceramic holes 104 correspond to the position where the first yarn clamping piece 8 and the second yarn clamping piece 9 are in close contact. The integrated design of the base 1 in this utility model reduces both material and installation costs.

[0080] In order to prevent yarn powder in the textile workshop from entering the actuator, the fitting clearance between the lubricating sleeve 12 and the guide rod 10 is between 0.005 and 0.05 mm. Such a small fitting clearance is conducive to storing a certain amount of compressed air, so that the yarn powder is blown out of the actuator under the action of the compressed air.

[0081] Based on the above, the working principle of the present invention is further described as follows:

[0082] Reference Figure 1 and Figure 2 As shown, when the electromagnetic coil is energized, according to Ampere's law (right-hand screw rule), a magnetic field is generated in the axial direction of the electromagnetic coil, and the direction of this magnetic field is the same as that of the iron core 4. Under the action of magnetic force, the valve cover 7 in the yarn pressing power assembly compresses the return spring 11 through the guide rod 10. Ultimately, under the buffering effect of the buffer ring 17, the magnetic attraction area 403 on the iron core 4 and the magnetic receiving area 703 on the valve cover 7 are brought into contact. When the power is turned off, the magnetic field generated by the coil quickly disappears. Under the combined action of the elastic force of the return spring 11 and the potential energy of air compression, the previously stored potential energy is quickly converted into kinetic energy, and the first yarn clamping piece 8 and the second yarn clamping piece 9 in the yarn pressing power assembly are in contact, realizing the yarn clamping action.

[0083] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made based on the essence of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A yarn gripper for textile use, characterized in that: It comprises a base (1), a magnetic conductive component, an executive component, a second yarn clamping piece (9), a feed adjustment member (14), a front positioning ring (6), an electromagnetic coil, a buffer ring (17), and a lubricating sleeve (12); The magnetic conductive component comprises a magnetic yoke (2), a rear magnetic cover (3), and an iron core (4); the rear magnetic cover (3) is coaxially fixed to one end of the magnetic yoke (2), the lubricating sleeve (12) is embedded in and fixed to the iron core (4), the iron core (4) passes through the rear magnetic cover (3), the electromagnetic coil, and the front positioning ring (6) in sequence, and the feed adjustment member (14) is coaxially mounted on the threaded adjustment sub-portion (402) of the iron core (4); The buffer ring (17) is mounted on the inner wall of the other end of the magnetic yoke (2); The actuator assembly comprises a guide spring core (13), a return spring (11), and a yarn pressing power assembly; the guide spring core (13), the return spring (11), and the yarn pressing power assembly are sequentially installed in the lubricating sleeve (12); The magnetic conductive component is coaxially mounted on the base (1); the second yarn clamping piece (9) is coaxial with the magnetic conductive component and is fixed in the second yarn pressing positioning portion (102) of the base (1).

2. A textile yarn gripper according to claim 1, characterized in that: The yarn pressing power assembly comprises a guide rod (10), a valve cover (7), and a first yarn clamping piece (8); the first yarn clamping piece (8) and the guide rod (10) are coaxially fixed in the valve cover (7).

3. A textile yarn gripper according to claim 2, characterized in that: The center of the valve cover (7) is provided with an axial hole (702) matching the guide rod (10); one end of the valve cover (7) is provided with a first yarn pressing positioning portion (701) matching the first yarn clamping piece (8) and coaxial with the axial hole (702); the other end of the valve cover (7) is provided with a magnetic receiving area (703) matching the magnetic attraction area (403) of the iron core (4).

4. A textile yarn gripper according to claim 1, characterized in that: A guide sleeve (401) matching the lubricating sleeve (12) is provided at the center of the iron core (4), the threaded adjustment sub-portion (402) is arranged at one end of the guide sleeve (401), and a magnetic attraction area (403) is provided at the other end of the guide sleeve (401), and the outer wall of the guide sleeve (401) forms an outer side wall (404) of the magnetic core matching the electromagnetic coil.

5. The textile yarn gripper according to claim 1, characterized in that: The base (1) is provided with an electromagnetic positioning groove (101) which is coaxial with the magnetic conductive component and matches the magnetic conductive component, and a second yarn pressing positioning portion (102) is provided on one side of the electromagnetic positioning groove (101).

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