Upper dial jacquard structure of circular knitting machine

Abstract

The utility model relates to the technical field of circular knitting machines, in particular to an upper dial jacquard structure of a circular knitting machine, which is characterized in that a needle selection piece is positioned on a plain stitch triangle only by a positioning boss and swings up and down in a small amplitude by taking the needle selection piece as a fulcrum, and does not need to slide in a needle groove along with a jacquard piece, so that the needle selection accuracy is improved, and the staggered patterns are reduced. The service life of the needle selection piece is prolonged, and the needle selection piece is prevented from loosening; meanwhile, the needle selection piece can fix the pattern bit through the sliding fit mode of the extension block and the open groove, the situation that the transmitting tube falls under the gravity effect after mechanical fatigue of the pattern bit is avoided, and normal jacquard operation of the circular knitting machine is guaranteed; the needle selection piece relatively slides in the opening groove of the pattern bit, so that shaking of the needle selection piece is effectively reduced, the needle selection accuracy is improved, and the risk of injection caused by too high machine speed is avoided; the front-back position of the needle selecting piece is fixed through the plain stitch triangle, and the relative position of the needle selecting piece and the needle selecting device is not changed, so that the needle selecting precision is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of large circular knitting machines, in particular to a jacquard structure of a needle disc on a circular knitting machine. Background Art

[0002] When the circular knitting machine is working, the jacquard piece swings up and down slightly around the fulcrum through the needle selector under the control of the needle selector. When the jacquard piece swings upward, the heel of the needle output piece of the jacquard piece will slide into the needle output track, thereby driving the jacquard piece to slide to the outside of the needle disk to realize the needle output action; when the jacquard piece swings downward, the heel of the needle output piece of the jacquard piece will not slide into the needle output track, thereby making the jacquard piece stay in the needle closing position to realize the needle closing action. After each needle output or needle closing action is completed, the jacquard piece will return to the initial position.

[0003] The patent document with the patent number of CN206635505U discloses a jacquard piece of a circular knitting machine, comprising a jacquard piece body, on which a needle-moving foot and a needle-selecting foot are provided; a limit groove is provided on the lower end surface of the tail end of the jacquard piece body; a fulcrum is provided on the lower end surface of the jacquard piece body, and the fulcrum is close to the front end of the jacquard piece body, and the lever principle is used to make the jacquard piece smoothly separate from the knitting needle under the action of its own weight during the back pressure process or the needle selection process;

[0004] The following deficiencies still exist in its practical application: in order to facilitate the operation of the jacquard piece in the needle groove, the jacquard piece needs to be bent, the traditional needle selection foot is usually arranged on the jacquard piece and is an integrated structure with the jacquard piece, and the jacquard piece and the knitting needle move in and out together during the operation of the circular knitting machine. As the jacquard piece is used in the needle groove for an increasing period of time, the jacquard piece is prone to mechanical fatigue and becomes loose in the needle groove, causing the upper jacquard piece to fall under the action of gravity, affecting the jacquard effect, and the jacquard piece and the knitting needle move in and out together, so that the relative position with the needle selector cannot be completely unified, which affects the accuracy of the jacquard, makes the machine run relatively slowly, and cannot increase the output. Utility Model Content

[0005] The utility model provides a jacquard structure of a needle disc on a circular knitting machine, which can effectively solve the above problems.

[0006] The utility model is achieved in this way:

[0007] A jacquard structure of a needle disk on a circular knitting machine, the structure comprising: an upper needle disk, a middle core arranged on the upper needle disk, a plurality of needle grooves extending radially thereof formed on the top surface of the upper needle disk, characterized in that a jacquard piece, a knitting needle and a needle selection piece are movably arranged in the needle groove, the head of the jacquard piece is buckled with the knitting needle, and also comprises an upper needle selector and a triangle mechanism for driving the jacquard piece and the knitting needle to complete the jacquard action, the middle core is also provided with a reset cam for driving the jacquard piece to reset, the needle selection piece is arranged between the bottom of the upper needle selector and the jacquard piece, the triangle mechanism comprises a needle raising cam cooperating with the jacquard piece, a flat needle cam fixing the needle selection piece, and a needle pressing cam cooperating with the knitting needle, one end of the needle selection piece has a positioning boss movably arranged with the bottom of the flat needle cam, and the other end is provided with an extension block slidably connected with the jacquard piece, and the jacquard piece is provided with an open groove for the extension block to slide radially.

[0008] As a further improvement, a needle selection foot matching the upper needle selector is provided on the top of the needle selector.

[0009] As a further improvement, the head of the jacquard piece is provided with a circular protrusion extending upward, and the tail of the knitting needle is provided with a connecting groove matching with the circular protrusion.

[0010] As a further improvement, the jacquard piece is provided with an open groove for the extension block to slide radially, and the tail of the needle selector is provided with an extension block that cooperates with the limiting groove.

[0011] The beneficial effects of the utility model are:

[0012] The needle selection plate and the jacquard plate of the utility model adopt a split structure. During the operation of the circular knitting machine, the jacquard plate and the knitting needles move in and out of the needle groove at the same time, and the jacquard plate cooperates with the extension block of the needle selection plate through the opening groove, so as to slide relatively with the needle selection plate, and the needle selection plate only swings up and down slightly with the positioning boss as a fulcrum, and does not need to slide in the needle groove with the jacquard plate, thereby extending the service life of the needle selection plate and preventing the needle selection plate from becoming loose; at the same time, the needle selection plate can fix the jacquard plate by the sliding cooperation between the extension block and the opening groove, avoiding the situation that the launching tube falls under the action of gravity after the mechanical fatigue of the jacquard plate, and ensuring the normal operation of the circular knitting machine jacquard; and the needle selection plate slides relatively in the opening groove of the jacquard plate, effectively reducing the jitter of the needle selection plate, improving the accuracy of needle selection, and avoiding the risk of needle injection due to excessive machine speed; the front and rear positions of the needle selection plate are fixed by the flat needle triangle and the relative position of the needle selector remains unchanged, further improving the needle selection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of a jacquard structure of a needle disc on a circular knitting machine provided by the utility model;

[0015] Figure 2 It is a structural schematic diagram of the jacquard piece, knitting needles and needle selection piece provided by the utility model in the installation state;

[0016] Figure 3 It is a structural schematic diagram of the jacquard piece provided by the utility model;

[0017] Figure 4 It is a structural schematic diagram of the needle selection piece provided by the utility model;

[0018] Figure 5 The utility model provides Figure 1 A is a schematic diagram of the structure enlarged;

[0019] Figure 6 It is a structural schematic diagram of a knitting needle provided by the utility model.

[0020] In the figure: upper needle disc -1, middle core -2, jacquard piece -3, knitting needle -4, upper needle selector -5, needle raising triangle -6A, flat needle triangle -6B, and needle pressing triangle -6C, reset triangle -7, needle selection piece -8, positioning boss -81, extension block -82, opening slot -31, needle selection foot -83, circular boss -32, connecting slot -41, limit slot -33, limit block -42. DETAILED DESCRIPTION

[0021] In order to make the embodiments of the utility model, all belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but only represents the selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0023] The traditional needle selection foot is usually set on the jacquard piece and is an integrated mechanism with the jacquard piece. During the operation of the circular knitting machine, the jacquard piece and the knitting needle move in and out together. As the jacquard piece is used in the needle groove for a longer time, the jacquard piece is prone to mechanical fatigue and becomes loose in the needle groove, causing the upper jacquard piece to fall under the action of gravity, affecting the jacquard effect. In order to solve the above technical problems, this case proposes the following technical solutions:

[0024] Reference Figures 1 to 6 As shown, a jacquard structure of the upper needle disc of a circular knitting machine comprises: an upper needle disc 1, a middle core 2 arranged on the upper needle disc 1, a plurality of needle grooves extending radially are formed on the top surface of the upper needle disc 1, a jacquard piece 3, a knitting needle 4 and a needle selector 8 are movably arranged in the needle groove, the head of the jacquard piece 3 is engaged with the knitting needle 4, and an upper needle selector 5 and a triangular mechanism are also included for driving the jacquard piece 3 and the knitting needle 4 to complete the jacquard action, and a reset mechanism for driving the jacquard piece 3 to reset is also provided on the middle core 2 Cam 7, the needle selector 8 is arranged between the bottom of the upper needle selector 5 and the jacquard piece 3, the cam mechanism includes a needle raising cam 6A matched with the jacquard piece 3, a flat needle cam 6B fixing the needle selector 8, and a needle pressing cam 6C matched with the knitting needle 4, one end of the needle selector 8 has a positioning boss 81 movably arranged with the bottom of the flat needle cam 6B, and the other end is provided with an extension block 82 slidably connected with the jacquard piece 3, and the jacquard piece 3 is provided with an opening groove 31 for the extension block 82 to slide along the radial direction;

[0025] The positioning boss 81 is movably connected to the middle core 2. When the upper needle selector 5 presses the needle selector 8, the needle selector 8 swings downward with the positioning boss 81 as a fulcrum. At the same time, since the extension block 82 is slidably connected to the opening slot 31, the jacquard piece 3 is driven to swing downward synchronously, thereby realizing the jacquard action.

[0026] Therefore, the needle selector 8 and the jacquard piece 3 of the present invention adopt a split structure. During the operation of the circular knitting machine, the jacquard piece 3 and the knitting needle 4 move in and out of the needle slot together, and the jacquard piece 3 cooperates with the extension block 82 through the opening slot 31, thereby sliding relatively with the needle selector 8, and the needle selector 8 only swings up and down slightly with the positioning boss 81 as a fulcrum, and does not need to slide in the needle slot with the jacquard piece 3, thereby extending the service life of the needle selector 8 and preventing the needle selector 8 from becoming loose.

[0027] At the same time, the needle selector 8 can fix the jacquard piece 3 by slidingly cooperating with the extension block 82 and the opening slot 31, so as to avoid the situation that the launch tube falls under the action of gravity after the jacquard piece 3 is mechanically fatigued, thereby ensuring the normal operation of the circular knitting machine;

[0028] In addition, the front and rear positions of the needle selector 8 are fixed by the flat needle cam 6B so that the relative position to the upper needle selector 5 remains unchanged, thereby greatly improving the needle selection accuracy.

[0029] Furthermore, a needle selection pin 83 matching with the upper needle selector 5 is provided on the top of the needle selector 8, so that the upper needle selector 5 controls whether to eject the needle through the needle selection pin 83.

[0030] The head of the jacquard piece 3 is provided with a circular protrusion 32 extending upward, and the tail of the knitting needle 4 is provided with a connecting groove 41 that cooperates with the circular protrusion 32. The circular protrusion 32 can be inserted into the connecting groove 41 to ensure the stability of the connection between the jacquard piece 3 and the knitting needle 4.

[0031] The head of the jacquard piece 3 is also provided with a limiting groove 33, and the tail of the knitting needle 4 is provided with a limiting block 42 that cooperates with the limiting groove 33. The limiting block 42 can be inserted into the limiting groove 33 to further improve the stability of the connection between the jacquard piece 3 and the knitting needle 4.

[0032] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A jacquard structure on a needle disc of a circular knitting machine, comprising: An upper needle disc (1), a middle core (2) arranged on the upper needle disc (1), the top surface of the upper needle disc (1) is formed with a plurality of needle grooves extending in the radial direction thereof, characterized in that: a jacquard piece (3), a knitting needle (4) and a needle selector (8) are movably arranged in the needle groove, the head of the jacquard piece (3) is engaged with the knitting needle (4), and the upper needle selector (5) and a cam mechanism are also included for driving the jacquard piece (3) and the knitting needle (4) to complete the jacquard action, the middle core (2) is also provided with a reset cam (7) for driving the jacquard piece (3) to reset, the needle selector (8) is 8) is arranged between the bottom of the upper needle selector (5) and the jacquard piece (3), the triangle mechanism includes a needle raising triangle (6A) cooperating with the jacquard piece (3), a flat needle triangle (6B) fixing the needle selector (8), and a needle pressing triangle (6C) cooperating with the knitting needle (4), one end of the needle selector (8) is provided with a positioning boss (81) movably arranged with the bottom of the flat needle triangle (6B), and the other end is provided with an extension block (82) slidably connected with the jacquard piece (3), and the jacquard piece (3) is provided with an open groove (31) for the extension block (82) to slide radially.

2. The jacquard structure of the upper needle plate of a circular knitting machine according to claim 1, characterized in that: The top of the needle selector (8) is provided with a needle selector foot (83) matching with the upper needle selector (5).

3. A jacquard structure for a circular knitting machine as claimed in claim 2, characterized in that: The head of the jacquard piece (3) is provided with a circular protrusion (32) extending upward, and the tail of the knitting needle (4) is provided with a connecting groove (41) matching with the circular protrusion (32).

4. A jacquard structure for a circular knitting machine as claimed in claim 3, characterized in that: The head of the jacquard piece (3) is also provided with a limiting groove (33), and the tail of the knitting needle (4) is provided with a limiting block (42) that cooperates with the limiting groove (33).

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