A coil independent needle selector

Abstract

The present invention discloses a coil-independent needle selector, including a valve body, a valve body provided with a knife selector, a magnetic frame, and a plurality of electromagnetic coil assemblies, the knife selectors are provided with a plurality of knife selectors and are pivotally connected to the valve body at intervals, the electromagnetic coil assemblies correspond to the knife selector positions one by one, and are used to drive the corresponding knife selectors to rotate relative to the valve body to adjust the knife selector angle, the magnetic frame is reciprocated along the arrangement direction of the electromagnetic coils to form a groove to accommodate the electromagnetic coil assembly, and a crossbeam is horizontally arranged below the magnetic frame, and the crossbeam cooperates with the groove to form an axial constraint force on the electromagnetic coil assembly. The solenoid valve coil assembly of the present invention adopts an independent design, and in the later maintenance process, the adverse effects of overall disassembly are avoided, so that the reliability of the product is greatly improved, and at the same time, by adding a coil fixing block and a plastic block, and improving the groove into a first accommodating groove and a second accommodating groove, the axial constraint force of the magnetic core can be achieved in cooperation with the crossbeam, and a fast and stable assembly can be completed.

Description

Technical Field

[0001] The invention relates to the technical field of knitting machinery, in particular to a needle selector with independent coils. Background Art

[0002] With the development of signal processing and sensor technology, computer control and detection technology are widely used in knitting equipment. As the core accessories of knitting equipment, electronic needle selectors are also in a critical period of innovation. In recent years, the high speed of knitting production and the high-end fabric products have put forward higher requirements on knitting equipment, especially on the performance indicators of electronic needle selectors such as working speed, reliability and consistency.

[0003] Electronic needle selectors are divided into two categories: piezoelectric and electromagnetic. The electromagnetic type is further divided into electric holding and magnetic holding. The magnetic holding electromagnetic needle selector has a large commutation force, a fast reciprocating frequency, and can rely on the core rod magnetic field to maintain the initial position of the needle selector when the circuit system is not working, so that the needle selector does not heat up. These characteristics have become the development trend of electronic needle selection technology. The electromagnetic needle selector can be divided into 8, 10 and 16 sections according to the number of needle selection heads. Each section corresponds to a magnetic core wound by a coil. The whole is composed of two rows of staggered placement in the front and back. The magnetic core is evenly riveted through an integral iron block and assembled with the corresponding coil to form a multi-group coil and magnetic core integration.

[0004] Such a structure restricts the development, production and maintenance of the product. How to simplify the combination of the needle selector and improve the production efficiency, reliability and maintainability of the needle selector has become a technical problem that the technicians in this field need to solve urgently.

[0005] For example, the patent number CN109667050B disclosed at present, entitled "Coil core replacement structure of needle selector", includes a base, one end of which is provided with a detachable mounting seat, the mounting seat is provided with a plurality of mounting slots, each mounting slot is provided with a coil core... This design does not need to correct other coil cores, thereby achieving the purpose of reducing technical difficulty and saving maintenance time. However, in this patent, the core assembly relationship is: the core is placed in the corresponding mounting slot, and then the two connected cores are fixed by the pressing block to achieve the function of fixing the coil assembly in pairs, so as to meet the use, resulting in the following disadvantages: 1. The mounting slot is a semicircular structure, and there is a deviation in the processing size such as cylindricality, which cannot meet the requirement of placing a group of coil assemblies (i.e. two connected cores) on a horizontal plane. It can also be understood that the cores can only be placed in the mounting slot due to the size difference between the cores, resulting in the inability of the coils between the groups to meet the requirement of being in a neat plane. 2. A pressing block fastens two cores, and the pressing block cannot move horizontally in the assembly logic, which will inevitably cause one of the cores to be subjected to force first, resulting in warping and deformation. 3. The coil is in direct contact with the metal. If one of the coils fails and leaks electricity, the rectification device will fail due to leakage, and it is more likely to be transmitted to the outside world through the device, posing a safety hazard.

[0006] This case was created to solve the above problems. Summary of the invention

[0007] 1. Technical issues to be solved

[0008] In view of the deficiencies of the prior art, the present invention provides a needle selector with independent coils, which solves the problems raised in the above background technology.

[0009] (II) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: a coil-independent needle selector, including a valve body, on which are provided a knife selector, a magnetic frame, and multiple groups of electromagnetic coil assemblies. The knife selectors are provided in multiple numbers and are pivotally connected to the valve body at intervals. The electromagnetic coil assemblies correspond to the knife selector positions one by one and are used to drive the corresponding knife selectors to rotate relative to the valve body to adjust the angle of the knife selector. The magnetic frame is reciprocatingly bent along the arrangement direction of the electromagnetic coils to form a groove to accommodate the electromagnetic coil assembly. A crossbeam is horizontally arranged below the magnetic frame, and the crossbeam cooperates with the groove to form an axial constraint on the electromagnetic coil assembly.

[0011] Preferably, the groove includes a first accommodating groove and a second accommodating groove which are connected to each other at the upper and lower parts, and the size of the first accommodating groove is smaller than the size of the second accommodating groove.

[0012] Preferably, the electromagnetic coil assembly includes a magnetic core longitudinally connected to a cross beam and a coil sleeved on the magnetic core. A coil fixing block is sleeved on the bottom of the electromagnetic coil assembly and its size is larger than the size of the coil. The coil and the coil fixing block are respectively assembled in the accommodating groove one and the accommodating groove two. The horizontal misalignment caused by the size difference between the accommodating groove one and the accommodating groove two and the formation of the cross beam limit the axial restraint force between the coil fixing block and the magnetic core.

[0013] Preferably, a plastic sheet is provided between the coil and the coil fixing block, and the plastic sheet has elastic deformation to compensate for the horizontal misalignment caused by the size difference between the coil fixing block and the accommodating grooves 1 and 2, and the gap deviation between the bottom end of the magnetic core and the crossbeam.

[0014] Preferably, the plastic sheet is made of PA66 and contains 10% to 15% glass fiber to improve the impact resistance of the plastic and reduce thermal deformation.

[0015] (III) Beneficial effects

[0016] After adopting the above technical scheme, the present invention has the following advantages compared with the prior art: the solenoid valve coil assembly of the present invention adopts an independent design, which avoids the adverse effects of overall disassembly during the later maintenance process, greatly improving the reliability of the product, and at the same time, through the addition of a coil fixing block and a plastic block, and the improvement of the groove into accommodating groove one and accommodating groove two, the axial constraint force of the magnetic core can be achieved in conjunction with the crossbeam, thereby completing fast and stable assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the needle selector of the present invention;

[0018] Figure 2 A top view of the needle selector of the present invention;

[0019] Figure 3 This is a front view of the needle selector of the present invention after removing the cover plate structure;

[0020] Figure 4 This is a front view of the needle selector of the present invention after the electromagnetic coil gland structure is removed;

[0021] Figure 5 This is a schematic diagram of the needle selector of the present invention after the electromagnetic coil gland structure is removed;

[0022] Figure 6 This is a schematic diagram of the needle selector of the present invention after the electromagnetic coil gland structure is removed;

[0023] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged local structure at center A;

[0024] Figure 8It is a schematic diagram of the structure of the magnetic conductive frame of the present invention;

[0025] Fig. 9 This is a schematic diagram of the disassembly process of the electromagnetic coil assembly of the present invention.

[0026] In the figure: 1. tool selection; 2. valve body; 3. cover plate; 4. tool head baffle; 5. cylindrical pin; 6. electromagnetic coil cover; 7. circuit board; 8. magnetic guide frame; 9. electromagnetic coil assembly; 91. magnetic core; 92. coil; 93. plastic sheet; 94. coil fixing block; 10. accommodating groove one; 11. accommodating groove two; 12. crossbeam. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below through the accompanying drawings and examples.

[0028] like Figure 1-8 As shown: a coil-independent needle selector, including a valve body 2, a knife selector 1, a magnetic frame 8, and multiple groups of electromagnetic coil 92 components, wherein the knife selector 1, the electromagnetic coil 92 components, and the magnetic frame 8 are all placed inside the valve body 2, wherein the knife selector 1 is provided with multiple and is pivotally connected to the valve body 2 at intervals, and the electromagnetic coil 92 components correspond to the positions of the knife selectors 1 one by one, and are used to drive the corresponding knife selectors 1 to rotate relative to the valve body 2 to adjust the angle of the knife selectors 1.

[0029] The magnetic frame 8 is reciprocatingly bent along the arrangement direction of the electromagnetic coil 92 to form a groove to accommodate the electromagnetic coil 92 assembly. A crossbeam 12 is horizontally arranged below the magnetic frame 8 to support the electromagnetic coil 92 assembly as a whole.

[0030] It should be noted that in this solution, the groove is formed by the mutually connected accommodating groove 10 and accommodating groove 2 11 on the upper and lower sides. The electromagnetic coil 92 assembly includes a magnetic core 91 longitudinally connected to the crossbeam 12, a coil 92 sleeved on the magnetic core 91, and a coil fixing block 94, wherein the coil fixing block 94 is sleeved on the bottom of the magnetic core 91, and its size is larger than the coil 92, so as to be able to axially support the coil 92 sleeved on the magnetic core 91.

[0031] Considering that the iron core has a certain length and the coil is adapted to the size of the receiving groove 1 so as to have a larger friction force, the coil 92 can be directly sleeved on the magnetic iron core 91, and of course, glue can be injected to further fix it.

[0032] The size of the first accommodating groove 10 is smaller than that of the second accommodating groove 11 , and the sizes of the two accommodating grooves are respectively matched with the sizes of the coil 92 and the coil fixing block 94 .

[0033] Furthermore, a plastic sheet 93 is provided between the coil 92 and the coil fixing block 94. The purpose of providing the plastic sheet 93 is to take into account that the magnetic frame 8, the cross beam 12 and the coil fixing block 94 are all made of metal. During the assembly process, due to the lack of the ability to flexibly deform, it is difficult to fully fit the magnetic core 91 and the coil fixing block 94 into the receiving groove 11, and the operation is cumbersome and inconvenient to assemble (i.e., if the gap between the coil fixing block 94 and the bottom of the receiving groove 10 is too small, it is difficult to insert the coil fixing block 94 therein; if the gap is too large, it will cause a large misalignment between the magnetic core 91 and the cross beam 12 below and cannot be defined as a whole). The plastic material has excellent self-lubricity and a little elastic deformation, which can make up for the gap deviation and facilitate the installation of the electromagnetic coil 92 assembly during assembly.

[0034] Secondly, in order to improve the reliability of the product, the coil 92 and its connected parts need to be insulated to avoid leakage of the coil 92, which may lead to product rectification, or even transfer current to the entire device through the product, causing the device to fail and bring safety hazards. Therefore, the addition of the plastic sheet 93 can also play an insulating role, making the circuit of the coil 92 partially independent.

[0035] The plastic sheet 93 is stressed on both sides, and the electromagnetic coil 92 will generate a certain amount of heat when the needle selector works for a long time. In order to improve the impact resistance of the plastic and reduce thermal deformation, PA66 can be selected for the plastic material and 10% to 15% of glass fiber can be added.

[0036] Working principle of needle selector:

[0037] 1. Assembly relationship ①: In the design of the tool selection 1, a cylindrical pin hole is reserved in the middle of the tool selection 1, which can penetrate the cylindrical pin 5, so that the tool selection 1 can rotate around the cylindrical pin 5. At the same time, two permanent magnets with different magnetic properties are embedded on one side of the tool selection 1 on a plane to provide driving force for the subsequent rotation of the tool selection 1. Figure 1 , Figure 2 It can be seen that the cylindrical pin 5 runs through the middle of the knife selection 1, and is evenly riveted to one side of the valve body 2 through the cylindrical pin 5. The knife head baffle 4 adopts an evenly distributed hollow design and is fastened to the end face of the valve body 2 by screw connection to constrain the rotation angle of the knife selection 1. Similarly, the magnetic frame 8 is also fastened inside the valve body 2 by screw connection to provide assembly space for the electromagnetic coil assembly 9.

[0038] 2. Assembly relationship ②: The electromagnetic coil assembly 9 is composed of a magnetic core 91, a coil fixing block 94, a plastic sheet 93 and a coil 92. The magnetic core 91 is connected to the coil fixing block 1 by riveting, and then the plastic sheet and the coil are assembled in sequence. In order to rationally utilize the side of the beam required for assembling the circuit board 7 inside the valve body, the beam 12 here is designed to cooperate with the electromagnetic coil assembly 9 to provide an axial constraint on one side for the coil assembly 9. The circular plane inside the magnetic frame 8 provides an axial constraint on the other side, and then the electromagnetic coil gland 6 is fastened to the magnetic frame 8 by screws to prevent the electromagnetic coil assembly 9 from falling off, and finally the circuit board 7 and the cover plate 3 are assembled.

[0039] 3. Initial position: The electromagnetic coil assembly 9 is not energized. Since the internal iron core is a permanent magnet core with magnetic properties, the knife selector 1 moves in one direction under the action of the magnetic attraction and repulsion forces of the magnet and ends at a side of the hollow area inside the knife head baffle 4.

[0040] 4. Power-on position: The law of electromagnetic induction shows that the electromagnetic coil assembly 9 can generate a magnetic field when current passes through it. The magnetic field acts on the iron core instantaneously, causing the iron core to be magnetized and maintain the magnetism corresponding to the direction of coil power-on. In other words, by changing the power-on direction (positive power-on, square power-on), the iron core magnetism can be specified. When the knife selection 1 needs to move in the opposite direction, the circuit board 7 is powered on through the circuit interface I, and the electromagnetic coil assembly 9 is controlled by the circuit board 7 to change the magnetism of the iron core in the initial position, so that the direction of the magnetic force is opposite, and the knife selection 1 moves in the opposite direction. The same movement ends at the other side of the hollow area inside the knife head baffle 4; when the circuit board 7 controls the electromagnetic coil assembly 9 to be powered off, the whole returns to the initial position.

[0041] The above-mentioned embodiments are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the scope of the invention. The technical scope of this new type of use is not limited to the content in the specification, and its protection scope must be determined according to the scope of the claims.

Claims

1. A coil-independent needle selector, comprising a valve body, a magnetic frame, and a plurality of electromagnetic coil assemblies, wherein the magnetic frame is reciprocatingly bent along the arrangement direction of the electromagnetic coils to form a plurality of grooves to accommodate the electromagnetic coil assemblies one by one, and a crossbeam fixed in the valve body is provided below the magnetic frame, characterized in that: A positioning member is provided on the lower side of the electromagnetic coil assembly, and the positioning member abuts against the lower end surface of the corresponding groove. The lower end of the electromagnetic coil assembly abuts against the upper end surface of the cross beam, and the cross beam cooperates with the groove to form an axial constraint force on the electromagnetic coil assembly; the groove includes a first accommodating groove and a second accommodating groove connected to each other at the upper and lower ends, and the size of the first accommodating groove is smaller than the size of the second accommodating groove so as to have a horizontal misalignment; the electromagnetic coil assembly includes a magnetic core longitudinally connected to the cross beam, and a coil sleeved on the magnetic core. The positioning member includes a coil fixing block sleeved on the magnetic core, and its size is larger than the size of the coil. The first accommodating groove and the second accommodating groove are respectively equipped with the coil and the coil fixing block. The misalignment caused by the size difference between the first accommodating groove and the second accommodating groove and the cross beam form an axial constraint force that limits the coil fixing block and the magnetic core; the positioning member also includes a plastic sheet, which is movably sleeved on the magnetic core and located between the coil and the coil fixing block. The plastic sheet has elastic deformation to respectively supplement the gap deviation between the coil fixing block and the bottom surface of the first accommodating groove, and between the bottom end of the magnetic core and the cross beam.

2. The needle selector with independent coil according to claim 1, characterized in that: The plastic sheet is made of PA66 material, and 10% to 15% of glass fiber is added to improve the impact resistance of the plastic and reduce the thermal deformation ability.

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