Double-pressure-head needle selector for flat knitting machine

Abstract

The utility model discloses a double-pressure-head needle selector for a flat knitting machine. The double-pressure-head needle selector comprises a shell, the driving device is arranged in the shell; the limiting pressing plate covers the shell and is provided with limiting grooves of which the number is the same as that of needle butts of selected needles; the needle selector blade is installed in the shell in a turnover mode, the needle selector blade penetrates through the limiting groove, the needle selector blade is driven by the driving device to swing left and right in the limiting groove, a pressing point A and a pressing point B are arranged at the upper end of the needle selector blade in a left-right symmetry mode, and a groove for needle selection not to be pressed is formed between the pressing point A and the pressing point B; the high point of the needle lifting triangle is located on an extension line of a groove formed by the pressing point A and the pressing point half B on the needle selector blade, and the high point of the needle lifting triangle and the needle selector blade form a channel for guiding a needle selection channel. The needle selector blade is optimized into the double-pressing-point needle selector blade, and meanwhile, the needle lifting triangle does not need to stretch out and draw back during needle lifting and reselection through the cooperation of the swing state of the needle lifting triangle and the swing state of the needle selector blade, so that motor arrangement is omitted.

Description

Technical Field

[0001] This utility model relates to textile equipment, and in particular to a double-head needle selector for a flat knitting machine. Background Technology

[0002] Traditional needle selectors use a single pressure point blade, with two sets of selectors per system. The needle lifting angle must be positioned between the two selectors for reselection. The needle pusher is located after the selector, meaning it pushes the needle after selection when the machine head moves left or right. To prevent the selector from contacting the pusher after reselection, the pusher needs to be movable, extending or retracting. This necessitates a motor-driven pusher, resulting in a complex and costly structure. Utility Model Content

[0003] The purpose of this invention is to provide a double-head needle selector for flat knitting machines, so as to change the problem of high cost and complex structure caused by the existing needle pusher triangle requiring motor drive to control its extension and retraction.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A dual-head needle selector for a flat knitting machine, comprising:

[0006] case;

[0007] The drive unit is housed within the casing;

[0008] A limiting pressure plate is installed on the housing, and the limiting pressure plate has limiting grooves with the same number of needle heels as the selection needles;

[0009] The needle selector blade is installed in the housing in a flip-up manner, and the needle selector blade passes through the limiting groove. The needle selector blade swings left and right in the limiting groove under the drive of the drive device. The upper end of the needle selector blade is symmetrically provided with pressure points A and B, and a groove is formed between pressure points A and B to allow the needle to be selected without pressure.

[0010] The needle lifting triangle has its highest point located on the extension line of the groove formed by pressure point A and pressure point half B on the needle selector blade, and forms a channel with the needle selector blade to guide the needle selection channel.

[0011] Preferably, the needle selector blade is arranged in a Y-shape with the upper pressure points A and B.

[0012] Preferably, the needle selector blade has a reduction hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This solution optimizes the single pressure point form on the needle selector blade to a double pressure point form. Each system is equipped with two sets of needle selectors, and a needle lifting triangle is set directly below each needle selector. When the needle moves to the middle of the needle selector, it is lifted for reselection. During needle lifting, the needle is located in the concave part between the two pressure points of the needle selector blade, so it will not interfere with the needle selector blade. After the needle lifting is completed, the needle is pressed and selected by one of the pressure points. The needles that are not pressed out are pushed by the needle pusher triangle for knitting. The pressed-out needles sink in and cannot contact the needle pusher triangle. In this solution, the needle pusher triangle is fixed, which eliminates the need for a motor drive, simplifies the structure, and reduces costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure when the needle enters the working state;

[0016] Figure 3 yes Figure 2 View from direction A;

[0017] Figure 4 This is a diagram illustrating the state when the needle is lowered and does not need to be withdrawn.

[0018] Figure 5 yes Figure 4 View from direction B;

[0019] Figure 6 This is a schematic diagram of the needle selector in the avoidance state;

[0020] Figure 7 This is a cross-sectional view of the needle selector.

[0021] Reference numerals in the attached drawings: 1. Housing; 2. Limiting pressure plate; 21. Limiting groove; 3. Needle selector blade; 31. Pressure point A; 32. Pressure point B; 33. Groove; 34. Reduction hole; 4. Needle lifting triangle; 5. Drive device. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figures 1-7 The diagram illustrates a double-head needle selector for a flat knitting machine, comprising a housing 1 fixedly mounted on the base plate of the computer flat knitting machine's grate structure, with the housing open and facing upwards. A limiting pressure plate 2 covers the opening of the housing 1. The limiting pressure plate 2 has limiting grooves (the needle assembly used in this design is a common model for computer flat knitting machines). It should be noted that the number of limiting grooves 21 on the limiting pressure plate 2 is the same as the number of needle butts X1 on the needle selector X in the needle assembly. Simultaneously, several needle selector blades 3 are installed in the housing 1, and these blades are rotatably connected to the housing 1 via a rotating shaft extending from their own ends. Furthermore, after passing through the limiting grooves, the head of each needle selector blade extends outside the housing and, driven by a driving device 5 installed in the housing, oscillates around the rotating shaft. It should be noted that the driving principle of the driving device in this design is prior art, disclosed in patent number 202022341857.3, and therefore will not be described in detail.

[0026] It should be noted that, in order to simplify the structure, two pressure points are symmetrically arranged on the left and right sides of the end of the needle selector blade 3 that extends out of the housing, namely pressure point A31 and pressure point B32. There is a smooth downward recessed part between these two pressure points. This recessed part is the groove 33 that can avoid the needle heel X1 of the needle selector X after it enters.

[0027] In addition, a needle lifting triangle 4 is included, which is adapted to the needle selector blade 3. This lifting triangle has an undulating profile that matches (is nearly parallel to) the contour lines of the two pressure points on the needle selector blade. The high point of the lifting triangle 4 (the protrusion of the undulating profile) is located on the extension line of the groove 33 formed by pressure points A31 and B32. At this time, the undulating profile line of the lifting triangle 4 can form a channel with the needle selector blade to guide the movement trajectory of the needle X.

[0028] Working principle: A drive device 5 is installed inside the housing 1. The left and right swing of each needle selector blade 3 is controlled by switching the positive and negative poles of the drive device 5, and each needle selector blade 3 can operate independently. The swing amplitude of the needle selector blade 3 depends on the width of the limiting groove 21 opened in the limiting pressure plate 2. The needle selector blade 3 is provided with two pressure points A31 and B32. These are used for the needle pressing action of the machine head moving left and right during various knitting operations of the flat knitting machine.

[0029] See details Figure 2 , Figure 3 As shown, a needle-lifting bend 4 is provided behind the needle selector. The highest point of the bend 4 corresponds to the middle groove 33 formed by the pressure points A31 and B32 on the needle selector blade 3. When needle selection begins, the needle selector X is raised to its highest point from the bend 4, and the needle selector pin X1 is positioned in the groove 33. This puts the needle selector X and the needle selector pin X1 in the working position.

[0030] See Figure 4 , Figure 5 As shown, if the needle does not need to be ejected, the needle selector blade 3 is in working condition, pressing down the needle selector X, and the needle selector pin X1 sinks in, preventing it from being taken away by the subsequent triangular head.

[0031] See Figure 6 As shown, if needles need to be ejected, the needle selector blade 3 is in an avoidance state, the needle selector X is not pressed down, and the needle ejection action is performed along the subsequent mountain-angle trajectory.

[0032] It should be noted that, as a further improvement to the above implementation scheme, the pressure points A and B on the needle selector blade 3 in this scheme are arranged in a Y-shape with the needle selector blade body. With this structure, the channel formed by the needle selection entry and exit lifting triangle and the needle selector blade will be smoother.

[0033] Furthermore, it should be noted that, as a further improvement to the above implementation scheme, a reduction hole 34 is provided on the needle selector blade 3. This reduction hole effectively reduces the weight of the needle selector blade 3, making the control of the needle selector blade by the drive device 5 more sensitive.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-head needle selector for a flat knitting machine, characterized in that: include Shell (1); The drive unit (5) is installed in the housing (1); A limiting pressure plate (2) is placed on the housing (1), and the limiting pressure plate (2) has a limiting groove (21) with the same number of needle heels as the selection needle; The needle selector blade (3) is installed in the housing (1) in a flip-up manner, and the needle selector blade (3) passes through the limiting groove (21). The needle selector blade (3) swings left and right in the limiting groove (21) under the drive of the drive device (5). The upper end of the needle selector blade (3) is symmetrically provided with pressure points A (31) and B (32). A groove (33) is formed between the pressure points A (31) and B (32) so that the needle can be selected without pressure. The needle lifting triangle (4) has its highest point located on the extension line of the groove (33) formed by the pressure point A (31) and the pressure point half B on the needle selector blade (3), and forms a channel with the needle selector blade (3) to guide the needle selection channel.

2. The double-head needle selector for a flat knitting machine as described in claim 1, characterized in that: The needle selector blade (3) is arranged in a Y-shape with the upper pressure point A (31) and pressure point B (32).

3. A double-head needle selector for a flat knitting machine as described in claim 1, characterized in that: The needle selector blade (3) has a reduction hole (34).

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