A needle selection device for circular weft jacquard machine

Abstract

The present invention discloses a needle selection device for a circular weft jacquard machine, belonging to the technical field of jacquard machines, comprising a needle cylinder and a bottom ring 1 and a bottom ring 2 fixed to each other, the bottom ring 1 being fixedly mounted with a connecting seat, the connecting seat being mounted with a cam assembly, the needle cylinder being formed with a needle slot, the needle slot being mounted with knitting needles, intermediate needles and jacquard pieces from top to bottom, the knitting needles, intermediate needles and jacquard pieces being matched with each other, the bottom ring 2 being mounted with a needle selector and an auxiliary cam connected to the jacquard piece, the side wall of the needle slot being provided with and connected with a receiving slot, the receiving slot being connected with a resistance member for increasing the resistance of the jacquard piece, the resistance member being slidably connected with the receiving slot through a control member, the control member being used to change the corresponding area of ​​the resistance member and the jacquard piece. The needle selection device for a circular weft jacquard machine of the present invention ensures stability and accuracy during needle selection, while reducing the probability of accidental needle removal caused by vibration actuating the jacquard piece.

Description

Technical Field

[0001] The invention relates to the technical field of jacquard machines, in particular to a needle selection device of a circular weft jacquard machine. Background Art

[0002] The circular jacquard machine is a kind of textile equipment. The knitting needles of the circular jacquard machine are installed on the circular needle cylinder. When weaving, the knitting needles rotate with the needle cylinder, and under the action of the triangular component, the needles hook the yarn and bend the yarn into coils that are intertwined to weave the fabric.

[0003] When the needle makes a rapid circle motion, the friction frequency between the needle and the needle groove of the syringe increases. In order to reduce frictional heat and frictional wear, lubricating oil is generally poured into the needle groove to form an oil film between the needle and the needle groove of the syringe to reduce the friction coefficient. However, this makes it easy for the jacquard piece to slide when the needle is not selected, increasing the probability of the needle being ejected due to external vibration, affecting the processing effect.

[0004] The existing method relies on a spring to drive the rubber block to contact the jacquard piece, thereby increasing the resistance when the jacquard piece is driven and reducing the probability of accidental needle removal.

[0005] This application provides another technical solution to this technical problem. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the prior art and to propose a needle selection device for a circular weft jacquard machine.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A needle selection device for a circular weft jacquard machine comprises a needle cylinder and a bottom ring 1 and a bottom ring 2 fixed to each other, the bottom ring 1 is fixedly installed with a connecting seat, the connecting seat is installed with a cam assembly, the needle cylinder is formed with a needle groove, the needle groove is installed with knitting needles, intermediate needles and jacquard pieces from top to bottom, the knitting needles, intermediate needles and jacquard pieces cooperate with each other, the bottom ring 2 is installed with a needle selector and an auxiliary cam connected to the jacquard piece, the side wall of the needle groove is provided with and connected with an accommodating groove, the accommodating groove is connected with a resistance member for increasing the resistance of the jacquard piece, the resistance member is slidably connected with the accommodating groove through a control member, the control member is used to change the corresponding area of ​​the resistance member and the jacquard piece, the resistance member comprises an elastic frame and two permanent magnet blocks, the elastic frame comprises an elastic deformation part and two extension parts, the two extension parts are formed at both ends of the elastic deformation part, the elastic deformation part abuts against the side wall of the accommodating groove, the two permanent magnet blocks are respectively fixed on the two extension parts, a space for the jacquard piece to pass through is formed between the two permanent magnet blocks, and the permanent magnet block does not directly contact the jacquard piece.

[0009] The present invention is further configured such that the length direction of the extension portion is perpendicular to the length direction of the jacquard piece.

[0010] The present invention is further configured as follows: the resistance member further comprises two rubber blocks respectively located on the two extension parts, and the rubber blocks are wrapped around the extension parts and the permanent magnet block.

[0011] The present invention is further configured as follows: the two extension parts extend outside the needle groove and the accommodating groove, the control component includes an electromagnet fixed to the second bottom ring, the electromagnet is used to attract the extension part, and the electromagnet and the needle selector do not correspond to the same jacquard piece.

[0012] The present invention is further configured such that: a bending portion is formed at one end of the extension portion away from the elastic deformation portion, and two bending portions of the same elastic frame are in contact with each other.

[0013] The present invention is further configured such that: a guiding slope is formed on one end of the rubber block away from the elastic deformation portion.

[0014] In summary, the present invention has the following beneficial effects:

[0015] When the jacquard piece corresponds to the needle selector, the corresponding area between the permanent magnet block and the jacquard piece is the smallest, so that the jacquard piece is subjected to a small magnetic force, thereby reducing the resistance that the jacquard piece needs to overcome when it is actuated by the needle selector, and reducing the load of the needle selector. When the jacquard piece corresponds to the electromagnet, the corresponding area between the permanent magnet block and the jacquard piece is the largest, so that the jacquard piece is subjected to a large magnetic force, thereby increasing the resistance that the jacquard piece needs to overcome when it is active, and reducing the probability of accidental needle ejection caused by vibration actuating the jacquard piece.

[0016] Compared with increasing the contact pressure to increase the friction and moving resistance overcome during actuation, relying on magnetic force can reduce the friction and wear on the pattern piece, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 The structure between the needle cylinder and the jacquard sheet of the present invention is schematically shown. Figure 1 ;

[0019] Figure 3 The structure between the needle cylinder and the jacquard sheet of the present invention is schematically shown. Figure 2 ;

[0020] Figure 4 It is a schematic diagram of the structure of the electromagnet and the selector of the present invention.

[0021] In the figure: 1. bottom circle one; 2. bottom circle two; 3. needle cylinder; 4. needle groove; 5. knitting needle; 6. middle needle; 7. jacquard piece; 8. connecting seat; 9. cam assembly; 10. auxiliary cam; 11. needle selector; 12. accommodating groove; 13. elastic deformation part; 14. extension part; 15. permanent magnet block; 16. rubber block; 17. electromagnet; 18. bending part. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments.

[0023] like Figure 1 As shown, the present application provides a needle selection device of a circular weft jacquard machine, including a bottom ring 1, a bottom ring 2 and a needle cylinder 3. The bottom ring 1 and the bottom ring 2 are fixed to each other by a connecting frame. The needle cylinder 3 is in a circular cylindrical shape with a hollow middle. The needle cylinder 3 will be installed on the gear ring disk of the circular weft jacquard machine. The motor drives the needle cylinder 3 to rotate through the gear ring disk. A plurality of needle grooves 4 are arranged at annular intervals on the outer surface, and the needle grooves 4 are installed with knitting needles 5, middle needles 6 and jacquard pieces 7 from top to bottom. The knitting needles 5, middle needles 6 and jacquard pieces 7 are butted against each other head to tail. The bottom ring 1 is fixedly installed with a connecting seat 8, and the connecting seat 8 is installed with a cam assembly 9. In this embodiment, the cam assembly 9 is composed of a loop forming triangle, a loop forming auxiliary triangle 10 and a jacquard triangle from top to bottom, and the loop forming triangle, the loop forming auxiliary triangle 10 and the jacquard triangle are all formed with The needle track, the knitting needle 5, the intermediate needle 6 and the jacquard piece 7 are all formed with needle clocks, and the needle clock of the knitting needle 5 slides into the needle track of the looping triangle, the needle clock of the intermediate needle 6 slides into the needle track of the looping auxiliary triangle 10, and the needle clock of the jacquard piece 7 slides into the needle track of the jacquard triangle, and the bottom circle 2 is equipped with the auxiliary triangle 10, the jacquard piece 7 forms a push needle that abuts against the auxiliary triangle 10, and the bottom circle 2 is equipped with a needle selector 11 through a bracket. In the circular weft jacquard machine, a number of needle selectors 11 are arranged in annular intervals with the needle cylinder 3 as the center. The jacquard piece 7 forms a jacquard needle that abuts against the knife head of the needle selector 11. The knife head of the needle selector 11 squeezes the jacquard needle of the jacquard piece 7 to change the needle track position entered by the needle clock, so as to realize the needle out, yarn hooking, looping and loop withdrawal of the knitting needle 5 in each weaving row, and then perform jacquard weaving.

[0024] like Figure 1 , Figure 2 as well as Figure 3 As shown, each needle groove 4 has a side wall with a receiving groove 12, which is connected to the needle groove 4. In this embodiment, the space cross section of the receiving groove 12 facing the outside is small, and the space cross section facing the inside is large, wherein the receiving groove 12 is connected to a resistance member, the resistance member includes an elastic frame and two permanent magnet blocks 15 and two rubber blocks 16, and the elastic frame includes an elastic deformation portion 13 and two extension portions 14, the two extension portions 14 are formed at both ends of the elastic deformation portion 13, and the elastic deformation portion 13 abuts against the side wall of most of the space cross section of the receiving groove 12. The two extension parts 14 extend to the outside of the needle groove 4 and the accommodating groove 12, the two permanent magnet blocks 15 are respectively fixed on the two extension parts 14, and the two rubber blocks 16 are respectively connected to the two extension parts 14, and the rubber blocks 16 are wrapped around the extension parts 14 and the permanent magnet blocks 15. A space for the jacquard piece 7 to pass through is formed between the two rubber blocks 16. The rubber blocks 16 are used to block the permanent magnet blocks 15 from directly contacting the jacquard piece 7, and the lubricating oil in the needle groove 4 will not contact the permanent magnet blocks 15. In this embodiment, the rubber blocks are made of nitrile rubber.

[0025] In this embodiment, the knitting needles 5, the middle needles 6, the jacquard piece 7 and the elastic frame are all made of spring steel, which makes them wear-resistant, pressure-resistant and strong. When the permanent magnet block 15 corresponds to the jacquard piece 7, the permanent magnet block 15 will produce a magnetic adsorption effect on the jacquard piece 7, thereby increasing the resistance that needs to be overcome when the jacquard piece 7 is actuated, reducing the probability of accidental needle removal caused by vibration on the actuation of the jacquard piece 7, and compared with increasing the contact pressure to increase the friction and activity resistance overcome during actuation, the magnetic force can reduce the wear on the jacquard piece 7, so that the service life can be extended. In the initial state, the jacquard piece 7 corresponds to part of the permanent magnet block 15. At this time, the positive projection area of ​​the magnetic flux lines of the permanent magnet block 15 passing through the jacquard piece 7 is the smallest, so that the resistance that needs to be overcome for the actuation of the jacquard piece 7 in this state is minimized.

[0026] like Figure 1 , Figure 3 as well as Figure 4As shown, a control component is arranged on the bottom ring 2, and the control component includes an electromagnet 17, which is fixedly connected to the bracket of the bottom ring 2. In the circular weft jacquard machine, a plurality of electromagnets 17 are arranged at annular intervals with the needle cylinder 3 as the center, and there is an electromagnet 17 between two adjacent needle selectors 11, so that the electromagnet 17 and the needle selector 11 do not correspond to the same jacquard piece 7, and when the electromagnet 17 corresponds to the jacquard piece 7, it also corresponds to the two extensions 14 of the elastic frame. When the electromagnet 17 is energized and the jacquard piece 7 corresponds to the electromagnet 17, the electromagnet 17 will attract the two extensions 14, and the extensions 14 will slide toward the direction close to the electromagnet 17, and the elastic deformation part 13 will be deformed under the sliding of the extension part 14, and a guiding inclined surface is formed on the end of the rubber block 16 away from the elastic deformation part 13, and the guiding inclined surface can guide the relative sliding between the rubber block 16 and the jacquard piece 7.

[0027] like Figure 1 , Figure 3 as well as Figure 4 As shown, when the extension portion 14 slides toward the electromagnet 17, the permanent magnet block 15 will also slide with the extension portion 14, which will increase the corresponding area between the jacquard piece 7 and the permanent magnet block 15, thereby increasing the positive projection area of ​​the magnetic flux lines of the permanent magnet block 15 passing through the jacquard piece 7, so that the resistance that needs to be overcome for the actuation of the jacquard piece 7 in this state is increased. At the same time, a bending portion 18 is formed at one end of the extension portion 14 away from the elastic deformation portion 13, and the two bending portions 18 of the same elastic frame are abutted against each other. The bending portion 18 can reduce the deformation of the extension portion 14 while increasing the area corresponding to the electromagnet 17, thereby ensuring that the electromagnet 17 can attract the extension portion 14.

[0028] When the jacquard piece 7 corresponds to the needle selector 11, the sliding resistance added by the permanent magnet block 15 to the jacquard piece 7 is small, thereby reducing the resistance that the jacquard piece 7 needs to overcome when being actuated by the needle selector 11, reducing the load of the needle selector 11, and ensuring the stability and accuracy during needle selection. When the jacquard piece 7 does not correspond to the needle selector 11 but corresponds to the electromagnet 17, the sliding resistance added by the permanent magnet block 15 to the jacquard piece 7 is large, increasing the resistance that the jacquard piece 7 needs to overcome when it is moving, and reducing the probability of accidental needle ejection caused by vibration actuating the jacquard piece 7.

[0029] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A needle selection device of a circular weft jacquard machine, comprising a needle cylinder and a bottom ring 1 and a bottom ring 2 fixed to each other, the bottom ring 1 is fixedly installed with a connecting seat, the connecting seat is installed with a cam assembly, the needle cylinder is formed with a needle groove, the needle groove is installed with knitting needles, intermediate needles and jacquard pieces from top to bottom, the knitting needles, intermediate needles and jacquard pieces cooperate with each other, the bottom ring 2 is installed with a needle selector and an auxiliary cam connected to the jacquard piece, characterized in that: The side wall of the needle groove is provided with and connected to a receiving groove, the receiving groove is connected to a resistance piece for increasing the resistance of the jacquard piece, the resistance piece is slidably connected to the receiving groove through a control piece, the control piece is used to change the corresponding area of ​​the resistance piece and the jacquard piece, the resistance piece includes an elastic frame and two permanent magnet blocks, the elastic frame includes an elastic deformation part and two extension parts, the two extension parts are formed at both ends of the elastic deformation part, the elastic deformation part abuts against the side wall of the receiving groove, the two permanent magnet blocks are respectively fixed on the two extension parts, a space for the jacquard piece to pass through is formed between the two permanent magnet blocks, the permanent magnet block is not in direct contact with the jacquard piece, the two extension parts extend outside the needle groove and the receiving groove, the control piece includes an electromagnet fixed on the second bottom ring, the electromagnet is used to attract the extension part, and the electromagnet and the needle selector do not correspond to the same jacquard piece.

2. The needle selection device of a circular jacquard machine according to claim 1, characterized in that: The length direction of the extension portion is perpendicular to the length direction of the jacquard piece.

3. The needle selection device of a circular jacquard machine according to claim 1, characterized in that: The resistance member further comprises two rubber blocks respectively located on the two extension parts, and the rubber blocks are wrapped around the extension parts and the permanent magnet block.

4. The needle selection device of a circular jacquard machine according to claim 1, characterized in that: A bending portion is formed at one end of the extension portion away from the elastic deformation portion, and two bending portions of the same elastic frame are in contact with each other.

5. The needle selection device of a circular jacquard machine according to claim 3, characterized in that: A guiding slope is formed at one end of the rubber block away from the elastic deformation portion.

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