Yarn gripper for spinning

Abstract

The invention discloses a yarn gripper for spinning. The yarn gripper comprises a base, a magnetic conductive 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 invention 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. At present, the yarn gripper has the following disadvantages, as follows:

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

[0004] The first yarn pressing assembly and the second yarn pressing assembly in the power actuator assembly of the yarn clamp are installed separately. In order to ensure basic coaxiality, it is necessary to adjust step by step. This installation method is not only troublesome, but also cannot guarantee whether the weft yarn can be completely clamped. If it cannot be completely clamped, further manual adjustment is required.

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

[0006] The current yarn gripper changes the yarn pressing force by moving the position of the power actuator. However, changing the yarn pressing force by changing the moving position will not only change the yarn pressing stroke, but also affect the response speed. For example, if the yarn pressing stroke is changed from 2mm to 4mm, although the yarn pressing force is increased, the electromagnetic suction force is reduced, and the time required for yarn pressing is prolonged. This adjustment method requires the entire yarn gripper to be disassembled for adjustment, which also brings certain troubles to the 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. Summary of the invention

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

[0010] In order to achieve the above object, the present invention adopts the following technical scheme: 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, 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 sub-part of the iron core;

[0012] The buffer ring is installed on the inner wall of the other end of the yoke; the buffer ring is used to buffer the yarn pressing power component when the electromagnetic coil is energized to prevent the iron core and the valve cover from violently colliding. At the same time, it is conducive to noise reduction.

[0013] Among them, the actuator includes a guide spring core, a return spring, and a yarn pressing power component; the guide spring core, the return spring, and the yarn pressing power component 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 the 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 part 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 gripper, a guide sleeve matching the lubricating sleeve is provided at the center of the iron core, a threaded adjustment sub-part is arranged at one end of the guide sleeve, a magnetic attraction area is provided at the other end of the guide sleeve, and 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 the magnetic conductive component and matching with 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 in the present invention realizes the coaxiality of the magnetic conductive component, the actuator 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] The present invention changes the compression stroke of the return spring by moving the position of the feed adjustment member on the threaded adjustment sub-part on the iron core, and further adjusts the size of the yarn pressing force. Different yarn pressing forces can be set for different weft yarn varieties, which greatly facilitates the user's adjustment. At the same time, the return springs with different spring stiffness can also be replaced to adjust the yarn pressing force.

[0022] The present invention 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; meanwhile, it is also beneficial to noise reduction.

[0023] The present invention 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 prolonging 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 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the external structure of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the base in the present invention;

[0028] Figure 4 It is a structural schematic diagram of the magnetic conductive component in the present invention;

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

[0030] Figure 6 It is a schematic diagram of the structure of the skeleton in the present invention;

[0031] Figure 7 It is a structural schematic diagram of the guide spring core in the present invention;

[0032] Figure 8 It is a structural schematic diagram of the yarn pressing power assembly in the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure 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-portion, 403- magnetic attraction area, 404- outer wall of the magnetic 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-the first clamping piece;

[0044] 9- the 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 is described in detail below with reference to the accompanying drawings and by means of exemplary embodiments. The following detailed description of the present invention is only for exemplary purposes and is by no means limiting of the present invention and its application or use.

[0055] Reference Figure 1 , and combined with Figure 2 to Figure 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 component 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, 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 installed on the threaded adjustment sub-portion 402 of the iron core 4;

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

[0059] Reference Figure 4 and Figure 5 Combined with Figure 1 As shown, the magnetic conductive component described in the present invention is further elaborated as follows: the yoke 2, the rear magnetic cover 3, and the iron core 4 are composed of magnetic conductive materials, and 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 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 yoke 2 is more than 1mm. The yoke 2 also supports and fixes the iron core 4. If the magnetic conductive component is not integrated, the yoke 2, the rear magnetic cover 3, and the iron core 4 are preferably welded and fixed together by welding. Since it is used in a textile environment, the magnetic conductive component is subjected to anti-corrosion treatment to improve the service life of the magnetic conductive component.

[0060] In order to ensure the coaxiality of the iron core 4 and the yoke 2 and to fix the electromagnetic coil, a front positioning ring 6 is inserted into the iron core 4 and the two are fixed together. The fixing method can be welding, glue fixing, or overfitting. The outer wall of the front positioning ring 6 is in contact with or transitionally fitted with the inner wall of the yoke 2. The front positioning ring 6 is made of non-magnetic material.

[0061] The electromagnetic coil is installed 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 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 a 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 guide spring core 13;

[0064] In order to prevent the spring guide 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 matching clearance is between 0.01 and 0.20 mm.

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

[0066] In order to buffer the yarn pressing power assembly when the electromagnetic coil is energized, prevent the iron core 4 and the valve cover 7 from violently colliding, and reduce noise, a buffer ring 17 is provided on the inner wall of the other end of the yoke 2. The buffer ring 17 contacts the other end surface of the front positioning ring 6, and the position of the buffer ring 17 is slightly higher than the height of the iron core 4. The surface where the buffer ring 17 collides with the valve cover 7 is a spherical surface, and such a design is conducive to improving the response speed of the actuator.

[0067] In order to coaxially mount 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 coaxial with the magnetic conductive component and matching with the magnetic conductive component is provided on the base 1; a second yarn pressing positioning portion 102 is provided on one side of the electromagnetic positioning groove 101, and a second yarn clamping piece 9 is embedded on the second yarn pressing positioning portion 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 set 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 on the base by threaded connection. The base 1 described in the present invention is integrated by injection molding. 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 between 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 5As shown, a guide sleeve 401 matching the lubricating sleeve 12 is provided at the center of the iron core 4, and a threaded adjustment part 402 is provided at one end of the guide sleeve 401; the threaded adjustment part 402 can be an internal thread or an external thread. When the threaded adjustment part 402 is an external thread, the feed adjustment member 14 is an internal thread.

[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 side wall 404 of the magnetic core matching 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 at 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 length of the guide rod 10 should be between 10 and 50 mm. If it is too long, the volume will increase; if it is too short, the coaxiality will not be high. Since the guide rod 10 is always in high-frequency motion, the material of the guide rod 10 should be wear-resistant and smooth, and ceramic is preferred. At the same time, the material of the lubricating sleeve 12 should be wear-resistant and can withstand high temperatures of 70 to 120°C for a long time. Engineering plastics such as PEEK, PA, POM... are preferred. Copper alloy tubes with self-lubricating functions, such as tin bronze tubes and brass tubes, can also be selected.

[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 present invention is further described as follows:

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

[0077] In order to have a clear numerical understanding of adjusting the yarn pressure force, a subdivided dial 15 is fixed on the feed adjustment member 14, and a thick scale line is marked on the yoke 2. In order to facilitate data memorization, the pitch of the feed adjustment member 14 in the present invention is set to 1mm. The thick scale line represents each grid as the pitch, indicating that the reset spring 11 is compressed or lengthened by 1mm. The scale line on the subdivided dial 15 is each grid = 1g, and the number of equal parts of a circle is determined by the spring stiffness. For example, if the spring stiffness is 20g / mm, it is divided into 20 equal parts.

[0078] The length of the iron core 4 described in the present invention is much greater than the length of the iron core of the original yarn clamp. 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 will generate a large magnetic force. The electromagnetic coil used in the present invention is relatively long, which further increases the magnetic force and further improves the response speed of the yarn clamp. 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] In order to position the weft yarn, a pair of ceramic holes 104 are provided on both radial sides of the base 1, and the ceramic holes 104 are used to install the ceramic eyelets 18. The center position of the pair of ceramic holes 104 corresponds to the position where the first yarn clamping piece 8 and the second yarn clamping piece 9 are in close contact. The present invention integrates the base 1 into an integrated design, which reduces the material cost on the one hand and the installation cost on the other hand.

[0080] In order to prevent yarn powder in the textile workshop from entering the actuator, the clearance between the lubricating sleeve 12 and the guide rod 10 is between 0.005 and 0.05 mm. Such a small clearance is conducive to storing a certain amount of compressed air, so that the yarn powder can be 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 will be generated in the axial direction of the electromagnetic coil, and the direction of the 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 reset spring 11 through the guide rod 10, and finally, under the buffering action 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 in contact. When the power is off, the magnetic field generated by the coil disappears quickly, and under the combined action of the elastic force of the reset spring 11 and the air compression potential energy, 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 fit together to achieve the yarn clamping action.

[0083] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made based on the essence of the content of the present invention should be included in the protection scope 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 actuator 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 a second yarn pressing positioning portion (102) of the base (1).

2. A textile yarn gripper according to claim 2, 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: An axial hole (702) matching the guide rod (10) is provided at the center of the valve cover (7); 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) of the iron core (4) is provided at the other end of the valve cover (7).

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), 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. A yarn gripper for textile use 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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