Composite needle of knitting machine
By introducing a avoidance groove and a guide slope into the knitting machine composite needle, combined with the clamping structure of the limit rod and the guide needle rod, the problem of high processing difficulty in the prior art is solved, and a more efficient and stronger knitting machine composite is achieved Needle production and use.
Patent Information
- Application Number
- CN202421043878.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The processing of composite needles of existing knitting machines is difficult, thin, and easy to damage, making it difficult to achieve efficient production.
By setting up a avoidance groove and a guide slope on the main needle rod, combining the clamping structure of the limit rod and the guide needle rod, the isolation sheet demand between the tongue needle and the needle hook is reduced, the processing difficulty is reduced, and the structural strength and braiding are improved. efficiency.
The processing process of composite needles is simplified, production costs are reduced, product flexibility and strength are improved, yarn damage is avoided, and processing reliability is enhanced.
Smart Images
Figure CN222294366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of knitting machines, in particular to a compound needle of a knitting machine. Background Art
[0002] A knitting machine is a knitting machine that is mainly used for transverse knitting. It weaves yarn into knitted fabric by controlling the lifting and lowering movement of the knitting needles.
[0003] At present, compound needles are increasingly used in knitting machines. The specified actions are completed through the mutual cooperation of various components in the compound needle. The compound needle generally includes a main needle with a needle hook, and a latch needle that cooperates with the main needle and yarn to complete actions such as looping, looping, gathering, and looping.
[0004] Generally, the latch needle can be arranged in the needle groove of the main needle and move relatively thereto, and two needle pieces are arranged at its end. During the movement relative to the main needle, the needle pieces can be separated from the needle hook of the main needle.
[0005] Such as TW528822B Figure 5 As shown in the figure, the main needle is provided with a needle groove, a spacer is arranged in the needle groove, and the two needle pieces of the latch needle are arranged in the left and right needle grooves of the spacer respectively. However, this structure is extremely difficult to process, and the thickness of the entire composite needle is relatively thin, and two uniform needle grooves need to be milled on the metal material of this thickness. If you are not careful, the entire main needle will be scrapped.
[0006] The function and structure of the latch needle determine that it is difficult to be processed in one piece. Therefore, it is generally divided into a needle guide rod that acts on the drive part, and a needle tongue that acts on the coil and cooperates with the hook needle (the needle tongue includes the two needle pieces mentioned above), such as CN208733302U. Figure 2 As shown, the needle guide rod (numbered 4 in the figure) and the two needle plates (numbered 5 and 6 in the figure) are connected by side-engaging riveting, which also has high processing requirements.
[0007] Therefore, the inventor conducted further research and developed a compound needle for a knitting machine, which resulted in the present invention. Utility Model Content
[0008] The utility model aims to provide a compound needle for a knitting machine, and reduces the difficulty of processing the compound needle by improving the structure of the compound needle, so as to achieve the purpose of reducing costs and increasing efficiency.
[0009] In order to achieve the above purpose, the technical solution of the utility model is as follows:
[0010] A compound needle for a knitting machine, comprising a main needle and a latch needle, wherein
[0011] The main needle includes a needle hook and a main needle rod. The needle hook is arranged at the end of the main needle rod. The needle hook gradually gathers at the hook tip. A needle groove is provided on the end surface of the main needle rod corresponding to the hook tip. A through avoidance groove is provided at the bottom of the needle groove. A guiding inclined surface is provided at one end of the needle groove close to the needle hook.
[0012] The latch needle comprises two needle pieces and a needle guide rod. The ends of the needle pieces are provided with needle latches. The two needle pieces are connected to the needle guide rod by clamping.
[0013] In the reset state, the needle piece is located in the needle groove, and the latch needle is flush with the bottom of the main needle rod;
[0014] When in working state, the two needle pieces of the latch needle slide in the needle groove, and the needle latch slides toward the hook tip portion under the guidance of the guide slope and can be separated by the hook tip portion.
[0015] In the above technical scheme, on the basis of allowing the latch needle to slide without falling off, the bottom part of the needle groove is opened up to form an avoidance groove, which can not only ensure that the needle groove is easier to mill out during processing, but also allow the latch needle to encounter less resistance when moving in the needle groove. Compared with the technical scheme with a groove bottom in the prior art, when the avoidance groove is provided, the latch needle can be designed to be wider, its structural strength is higher, and it is less likely to be damaged during operation; the latch needle can cooperate with the guide bevel, so that the cooperation between the needle tongue and the needle hook does not require the isolation plate described in the background technology, and the existence of the guide bevel is also utilized to prevent the yarn from being damaged by the clamping between the latch needle and the needle hook; the clamping of the needle sheet by the needle guide rod can also reduce the processing difficulty of the latch needle; the return state here refers to the state when the latch needle is in the needle groove and does not interact with the yarn (also called the zero position).
[0016] Furthermore, a reinforcing member is arranged in the avoidance groove, and the reinforcing member enables the avoidance groove to be arranged at intervals in the length direction of the main needle rod.
[0017] Taking into account the strength of the main needle rod, a reinforcing member may be provided in the avoidance groove so that the avoidance groove is divided into several sections.
[0018] Furthermore, the reinforcement member is an arc-shaped groove bottom, and the arc-shaped groove bottom divides the avoidance groove into two.
[0019] The arc groove bottom needs to cooperate with the latch needle to ensure that there is space for yarn storage between the needle hook and the latch needle.
[0020] Furthermore, the needle tongues on the two needle sheets are relatively expanded, and the distance between the needle tongues can accommodate the separation of the hook tip portions.
[0021] Since a spacer as in the background art is no longer provided, it is necessary to ensure that the needle tongue can be separated by the hook tip during operation.
[0022] Furthermore, the portion of the needle guide rod used to clamp the needle piece is the clamping portion, and the clamping portion clamps the needle piece through two clamping pieces.
[0023] Furthermore, the portion of the main needle rod with the needle groove is the needle groove portion, one end of the needle groove portion is a needle hook, and the other end of the needle groove portion is a solid portion, and a limiting rod is arranged at the solid portion; a limiting protrusion is arranged at the end of the limiting rod on the side close to the needle groove portion; the clamping portion of the guide needle rod is provided with a barb portion, and the barb portion and the limiting protrusion are installed in coordination.
[0024] The limiting protrusion cooperates with the barb portion to press the latch needle in the reset state into the needle groove all the time, and the latch needle will not be separated from the needle groove due to vibration during the operation of the machine.
[0025] Furthermore, the length of the limiting rod is greater than or equal to 5 mm, and the inclination angle of the guiding inclined surface relative to the groove bottom is 15-35°.
[0026] The limit rod needs to have a certain length so that it has a certain elasticity, so that when the guide needle rod moves, the barb part can be stuck into the limit protrusion of the limit rod or easily withdrawn;
[0027] If the inclination angle of the guide bevel is too flat, the stroke of the latch needle will increase, affecting the knitting efficiency; if the inclination angle is too steep, the sliding load of the latch needle will increase, and the contact part will be easily worn.
[0028] Furthermore, a convex arc edge is provided on the needle groove wall at one end of the needle groove away from the needle hook.
[0029] The raised arc edge is also used to ensure that there is space for yarn storage between the needle hook and the latch needle.
[0030] Furthermore, the difference between the thickness of the clamping portion of the guide needle rod and the thickness of the main needle rod is in the range of -0.2 to 0.2 mm.
[0031] Furthermore, a recessed positioning arc is provided below the limiting protrusion.
[0032] The positioning arc is used to better coordinate the engagement and entry and exit of the latch needle.
[0033] The principle of the compound needle of the knitting machine has not been essentially changed after its invention, so the improvement relative to the prior art is all in the improvement of its structural details. Compared with the prior art, the present invention makes its processing simpler while satisfying the function of the compound needle itself, and improves some detail problems encountered in its working process, such as using an avoidance groove to avoid the needle tongue, while taking into account the strength of the tongue needle and the main needle rod itself; or using a limit rod and a limit protrusion to cooperate, while limiting the sliding distance of the tongue needle, it can also ensure that the tongue needle is stably in the needle groove and does not move when it is in the return state;
[0034] The above characteristics make the use of the compound needle more flexible and the processing simpler. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1It is a schematic diagram of an embodiment of the utility model;
[0036] Figure 2 It is a schematic diagram of the main needle part;
[0037] Figure 3 is a cross-sectional view of the main needle portion;
[0038] Figure 4 It is a schematic diagram of the avoidance groove on the main needle bar;
[0039] Figure 5 It is a schematic diagram of the tongue needle part;
[0040] Figure 6 It is a schematic diagram of the needle guide rod clamping the needle piece;
[0041] Figure 7 Schematic diagram of the engagement between the limiting protrusion and the barb (i.e., the reset state);
[0042] Figure 8 It is a schematic diagram of the latch needle when the latch needle slides in the needle groove (working state);
[0043] Fig. 9 This is a schematic diagram of the needle hook separating the needle tongue (working state);
[0044] Fig.10 It is a schematic diagram of the arc groove bottom and the latch needle acting together (working state);
[0045] Fig.11 It is a schematic diagram of the main needle bar opening a positioning arc;
[0046] Description of symbols
[0047] Main needle 1, needle hook 11, hook tip 111,
[0048] Main needle bar 12, needle groove 121, guide slope 1211, raised arc edge 1212,
[0049] Avoidance groove 122, arc groove bottom 1221, limiting rod 123, limiting protrusion 1231,
[0050] Positioning arc 124;
[0051] Latch needle 2, needle piece 21, needle latch 211, needle guide rod 22, barb part 221,
[0052] Yarn storage space3. DETAILED DESCRIPTION
[0053] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0054] like Figure 1As shown, a compound needle for a knitting machine mainly comprises a main needle 1 and a latch needle 2. By pushing the butt on the needle guide rod 22 of the latch needle 2, the latch needle 2 can be moved relative to the main needle 1, and cooperate with the main needle 1 to complete actions such as loop formation, loop removal, loop gathering, and loop withdrawal.
[0055] Among them, the main structure of the main needle 1 is as follows Figure 2-4 As shown, the main needle 1 includes a needle hook 11 and a main needle rod 12. The needle hook 11 is arranged at the end of the main needle rod 12. The needle hook 11 is gradually gathered at the hook tip 111 from both sides. A needle groove 121 is provided on the end face of the main needle rod 12 corresponding to the hook tip 111. An avoidance groove 122 is provided at the bottom of the needle groove 121. A guide slope 1211 is provided at one end of the needle groove 121 close to the needle hook 11. The inclination of the guide slope 1211 is upward from the avoidance groove 122 to the hook tip 111. When the two needle sheets 21 of the latch needle 2 slide in the needle groove 121, the needle tongue 211 of the latch needle 2 is guided to move toward the needle hook 11.
[0056] The structure of the latch needle 2 is shown in Figures 5 and 6. The latch needle 2 includes two needle blades 21 and a needle guide rod 22. A needle tongue 211 is provided at the end of the needle blade 21. The two needle blades 21 and the needle guide rod 22 are connected by clamping and further fixed by welding or extrusion. The needle tongue 211 can be regarded as an extension of the needle blade 21. Figure 5 As shown, the vertical side adjacent to the needle plate 21 and the needle tongue 211 can be regarded as their dividing line, and this vertical boundary can also enable the needle tongue 211 to better interact with the yarn. Figure 6 As shown, the two needle tongues 211 are slightly expanded outwards, and the gap between them facilitates the insertion of the needle hook 11.
[0057] As a preferred embodiment, the avoidance groove 122 is divided into two, and the avoidance groove is arranged at intervals at the groove bottom in the length direction of the main needle rod 12, and an arc groove bottom 1221 is arranged between the two avoidance grooves. The existence of the arc groove bottom 1221 can strengthen the strength of the main needle rod itself, and at the same time, it also plays a role in lifting the latch needle, ensuring that there is a yarn storage space 3 between the latch needle and the needle hook. The part where the avoidance groove 122 is located can be regarded as the groove bottom of the needle groove 121 does not exist, that is, when the latch needle 2 moves in the needle groove 121, it is equivalent to the main needle rod 12 avoiding the space to the bottom edge of the latch needle 2, and making the latch needle have a wider structure, so that it is not easy to be damaged, and can be guided to the needle hook through the guide slope 1211; and due to the existence of the avoidance groove 122, it is also more convenient to process the needle groove 121.
[0058] For the convenience of distinction, the portion of the main needle bar 12 with the needle groove 121 is called the needle groove portion, one end of the needle groove portion is the needle hook 11, and the other end of the needle groove portion is called the solid portion. Figure 3A longer limiting rod 123 is arranged at the solid part on the left side of the needle groove part. The rod length of the limiting rod generally needs to be greater than or equal to 5 mm. There is a certain distance between the limiting rod 123 and the solid part to form a U-shaped groove, so that the limiting rod 123 has a certain elasticity. A limiting protrusion 1231 is arranged at the end of the limiting rod 123 on the side close to the needle groove part.
[0059] The part of the needle guide rod 22 for clamping the needle blade 21 is defined as the clamping part. Figure 5 As shown, a barb portion 221 is provided on the left side of the clamping portion; the barb portion 221 can be engaged with the limiting protrusion 1231 of the aforementioned limiting rod 123, refer to Figure 7 As shown, since the limiting rod 123 has a certain elasticity, when the latch needle is in the reset state, the barb 221 can be engaged in the limiting protrusion 1231, and the limiting protrusion can realize the pressing and positioning of the latch needle, and the latch needle is always pressed and stabilized in the needle groove, and is not affected by the vibration of the machine when it is running and leaves the needle groove (this is also called the zero position during knitting, and the entire compound needle is not involved in knitting). When it needs to participate in knitting, the needle butt of the latch needle 2 is pushed, and the barb 221 is pushed out from the limiting protrusion 1231, so that various functions of the compound needle can be realized.
[0060] Preferably, the difference between the thickness of the clamping portion of the guide needle rod 22 and the thickness of the main needle rod 12 is less than or equal to 0.2 mm.
[0061] When the needle latch starts to slide in the needle groove, Figure 8 In the structure shown, the latch needle slides on the guide slope, such as Fig. 9 In the structure shown in the figure, a convex arc edge 1212 is provided on the needle groove wall at one end of the needle groove limiting rod 123, and the convex arc edge 1212 interacts with the barb portion 221, such as Fig.10 In the structure shown, the arc groove bottom 1221 acts on the bottom of the latch needle. During the above process, a yarn storage space 3 is always maintained between the latch needle and the needle hook, so that the yarn in the space will not be damaged due to clamping.
[0062] As a preference, Fig.11 As shown, a recessed positioning arc 124 is provided below the limiting protrusion 1231 to better cooperate with the engagement and entry and exit of the tongue needle.
[0063] The above are only specific embodiments of the present utility model. At the same time, all words such as "upper, lower, left, right, middle" involved in the present utility model are for reference only and are not absolutely limiting. Any non-substantial changes made using the present utility model shall be deemed as an infringement of the protection scope of the present utility model.
Claims
1. A compound needle for a knitting machine, characterized in that: Including main needle and latch needle, The main needle includes a needle hook and a main needle rod. The needle hook is arranged at the end of the main needle rod. The needle hook gradually gathers at the hook tip. A needle groove is provided on the end surface of the main needle rod corresponding to the hook tip. A through avoidance groove is provided at the bottom of the needle groove. A guiding inclined surface is provided at one end of the needle groove close to the needle hook. The latch needle comprises two needle pieces and a needle guide rod. The ends of the needle pieces are provided with needle latches. The two needle pieces are connected to the needle guide rod by clamping. In the reset state, the needle piece is located in the needle groove, and the latch needle is flush with the bottom of the main needle rod; When in working state, the two needle pieces of the latch needle slide in the needle groove, and the needle latch slides toward the hook tip portion under the guidance of the guide slope and can be separated by the hook tip portion.
2. A compound needle for a knitting machine according to claim 1, characterized in that: A reinforcing piece is arranged in the avoidance groove, and the reinforcing piece enables the avoidance groove to be arranged at intervals in the length direction of the main needle rod.
3. A compound needle for a knitting machine according to claim 1, characterized in that: The reinforcement member is an arc-shaped groove bottom, which divides the avoidance groove into two parts.
4. A compound needle for a knitting machine according to claim 1, characterized in that: The needle tongues on the two needle sheets are relatively expanded, and the distance between the needle tongues can accommodate the separation of the hook tips.
5. The compound needle for a knitting machine according to claim 1, characterized in that: The part of the needle guide rod used for clamping the needle piece is the clamping part, and the clamping part clamps the needle piece through two clamping pieces.
6. A compound needle for a knitting machine according to claim 1, characterized in that: The part of the main needle rod with the needle groove is the needle groove part, one end of the needle groove part is the needle hook, and the other end of the needle groove part is a solid part, and a limiting rod is arranged at the solid part; a limiting protrusion is arranged at the end of the limiting rod on the side close to the needle groove part; the clamping part of the guide needle rod is provided with a barb part, and the barb part and the limiting protrusion are installed in coordination.
7. A compound needle for a knitting machine according to claim 1, characterized in that: The clamping portion of the needle guide rod is provided with a barb portion, and the barb portion and the limiting protrusion of the limiting rod on the solid portion of the main needle rod are installed in cooperation.
8. The compound needle for a knitting machine according to claim 6, characterized in that: The length of the limiting rod is greater than or equal to 5 mm, and the inclination angle of the guiding inclined surface relative to the groove bottom is 15-35 degrees.
9. The compound needle for a knitting machine according to claim 1, characterized in that: A convex arc edge is arranged on a needle groove wall at one end of the needle groove away from the needle hook.
10. The compound needle for a knitting machine according to claim 6, characterized in that: A recessed positioning arc is arranged below the limiting protrusion.