A main needle structure of a compound needle of a knitting machine
By introducing clearance grooves, guide bevels, and limit rods into the composite needles of knitting machines, the problems of high processing difficulty and easy damage to the latch needles are solved, resulting in simpler processing and higher structural strength and knitting efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG RUIFENG INTELLIGENT TECH CO LTD
- Filing Date
- 2024-05-14
- Publication Date
- 2026-05-12
AI Technical Summary
Existing composite needles are difficult to process on knitting machines, and latch needles are easily damaged due to high stress.
A main needle structure for a composite needle in a knitting machine was designed, including a needle hook, a main needle bar, a needle groove, a clearance groove, a guide slope, and a limiting rod. The clearance groove reduces the processing difficulty, the guide slope reduces the resistance of the latch needle, and the limiting rod provides elastic locking to ensure that the latch needle is not easily damaged.
It simplifies the manufacturing process, reduces the risk of wear on the latch needle, and improves structural strength and weaving efficiency.
Smart Images
Figure CN118461215B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of knitting machines, and specifically to a main needle structure for a composite needle in a knitting machine. Background Technology
[0002] A knitting machine is a type of knitting machinery, mainly used for horizontal knitting. It knits yarn into fabric by controlling the up-and-down movement of the needles.
[0003] Currently, compound needles are being used more and more commonly on knitting machines. The compound needle completes the specified action by cooperating with the various components. A compound needle generally includes a main needle with a hook, and a latch needle that works with the main needle and yarn to complete actions such as looping, looping away, loop gathering, and loop unwinding.
[0004] Generally, the tongue needle can be set in the needle groove of the main needle and move relative to it. Its end is provided with two needle plates. During the movement relative to the main needle, the needle plates can be separated from the needle hook of the main needle.
[0005] For example, TW528822B Figure 5 As shown, the main needle has a needle groove with an isolation plate inside. The two needle plates of the latch needle are respectively placed in the left and right needle grooves of the isolation plate. However, this structure is extremely difficult to manufacture. The entire composite needle is quite thin, requiring two uniform needle grooves to be milled into the metal material of this thickness. The slightest mistake will ruin the entire main needle. Furthermore, the latch needle experiences significant resistance during movement, requiring sufficient power to push it, which puts a greater burden on the heel of the latch needle, making it prone to damage.
[0006] Therefore, the inventors conducted further research and developed a main needle structure for a composite needle in a knitting machine, which led to this invention. Summary of the Invention
[0007] The purpose of this invention is to provide a main needle structure for a composite needle in a knitting machine, which reduces the processing difficulty and achieves the goal of reducing costs and increasing efficiency.
[0008] To achieve the above objectives, the technical solution of the present invention is as follows:
[0009] A main needle structure for a composite needle in a knitting machine includes a needle hook and a main needle bar. The needle hook is located at the end of the main needle bar, and a needle groove is formed on the end face of the main needle bar corresponding to the tip of the needle hook.
[0010] The part of the main needle bar with a needle groove is called the needle groove part. One end of the needle groove part is connected to the aforementioned needle hook, and the other end of the needle groove part is connected to the solid part. A limiting rod is provided at the solid part, and the limiting rod has elastic deformation capability. A limiting protrusion is provided at the end of the limiting rod near the needle groove part, and the limiting protrusion can engage and position the tongue needle of the composite needle.
[0011] The bottom of the needle groove is also provided with a clearance groove, which is a through groove structure. A guide slope is provided on the side of the needle groove near the needle hook, and the inclination direction of the guide slope is from the clearance groove to the hook tip.
[0012] A clearance groove is formed by opening the bottom of the needle groove. This not only makes it easier to mill the needle groove during processing, but also allows the tongue needle to move in the needle groove and be nearly flush with the bottom of the groove. At this time, the resistance experienced by the tongue needle is small. Compared with the case with a groove bottom, the tongue needle with a clearance groove can be designed to be wider, with higher structural strength and less prone to damage during operation (due to the structural limitations of the composite needle itself, its overall width is limited, so the design space is limited). The limiting protrusion can achieve pressing and positioning of the tongue needle. When the tongue needle is in the returned state (non-moving state), it is always pressed and stable in the needle groove, and is not affected by the vibration of the machine during operation and will not be dislodged from the needle groove.
[0013] Furthermore, when the compound needle is in the homing position, the clearance groove allows the tongue of the compound needle to be flush with the bottom of the main needle shaft;
[0014] When the composite needle is in working condition, the guide bevel can guide the tongue of the composite needle to slide towards the hook tip, and allow the tongue to be separated from the hook tip. During this process, there is always space between the needle hook and the tongue for the yarn to be stored.
[0015] The "returning state" here refers to the state when the latch needle is in the needle groove and does not interact with the yarn, which can also be called the zero position state. The guide slope makes the engagement of the latch needle and the needle hook unnecessary as described in the background art, and at the same time, the presence of the guide slope also prevents the yarn from being damaged by the clamping between the latch needle and the needle hook.
[0016] Furthermore, a reinforcing member is provided in the clearance groove, which makes the clearance groove spaced apart along the length of the main needle rod.
[0017] Considering the strength of the main needle rod, a reinforcing member can be installed in the clearance groove to divide the clearance groove into several sections.
[0018] Furthermore, the reinforcing component has an arc-shaped groove bottom, which divides the clearance groove into two parts.
[0019] The curved groove bottom needs to be used in conjunction with the latch needle to ensure that there is space between the needle hook and the latch needle for the yarn to be stored.
[0020] Furthermore, the clearance groove can be a rectangular hole, an elliptical hole, or a strip-shaped hole.
[0021] Furthermore, the needle groove wall at the end away from the needle hook is provided with a raised arc edge.
[0022] The raised arc edge also serves to ensure that there is space between the needle hook and the latch needle for the yarn to be stored.
[0023] Furthermore, the length of the limiting rod is greater than or equal to 5mm.
[0024] The limiting rod needs to have a certain length to give it a certain degree of elasticity, so that it can engage with the limiting part of the tongue needle, continuously apply pressure, and allow the tongue needle to be pushed out from the limiting protrusion.
[0025] Furthermore, the two sides of the hook gradually converge at the hook tip.
[0026] The gathered hooks on both sides can better separate the two needle plates of the compound needle tongue.
[0027] Furthermore, the inclination angle of the guide ramp relative to the bottom of the groove is 15-35°.
[0028] A tilt angle that is too flat means that the travel of the latch needle increases, which affects the knitting efficiency. A tilt angle that is too steep increases the sliding load on the latch needle, making the contact part prone to wear.
[0029] Furthermore, a recessed positioning arc is provided below the limiting protrusion.
[0030] By adopting the above solution, the present invention has the following advantages compared with the prior art:
[0031] While fulfilling the function of the composite needle itself, the processing is made simpler, and the clearance groove is used to prevent the needle tongue from being exposed. At the same time, the design of the main needle and the tongue needle is considered to have stronger structural strength, and the guide slope is used to guide the needle plate of the tongue needle to the needle hook. Furthermore, a flexible limiting rod can be used in conjunction with the tongue needle to limit its movement, so that it is not affected by the vibration of the machine and will not be dislodged from the needle groove. Attached Figure Description
[0032] Figure 1 This is a schematic diagram of an embodiment of the present invention in conjunction with a tongue needle;
[0033] Figure 2 This is a schematic diagram of an embodiment of the present invention;
[0034] Figure 3 This is a cross-sectional view of an embodiment of the present invention;
[0035] Figure 4 This is a schematic diagram of the clearance groove on the main needle bar;
[0036] Figure 5 This is a schematic diagram of another embodiment where a raised arc edge is provided on the needle groove wall;
[0037] Figure 6 This is a schematic diagram of the yarn storage space;
[0038] Figure 7 This is a schematic diagram of yet another embodiment;
[0039] Label Explanation
[0040] Main needle 1, hook 11, hook tip 111;
[0041] Main needle bar 12, needle groove 121, guide bevel 1211, raised arc edge 1212.
[0042] 122 clearance groove, 1221 arc-shaped groove bottom, 123 limiting rod, 1231 limiting protrusion.
[0043] Positioning arc 124;
[0044] 2. Tongue needle; 3. Yarn storage space. Detailed Implementation
[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0046] like Figure 1 The diagram shown illustrates the relationship between the main needle 1 and the tongue needle 2 in this embodiment.
[0047] The main needle 1 (i.e., the main needle structure of the composite needle of the knitting machine) includes a needle hook 11 and a main needle bar 12. The needle hook 11 is located at the end of the main needle bar 12, and the needle hook 11 gradually converges from both sides to the hook tip 111 to ensure that the two needle plates of the latch needle can be separated by the needle hook. A needle groove 121 is formed on the end face of the main needle bar 12 corresponding to the hook tip 111. An avoidance groove 122 is formed at the bottom of the needle groove 121, and the part where the avoidance groove 122 is located can be regarded as the absence of the bottom of the needle groove 121. A guide slope 1211 is provided on the side of the needle groove 121 near the needle hook 11. The guide slope is used to guide the latch needle to slide towards the needle hook. Figure 3 In the structure shown, the guide slope 1211 is inclined from left to right and upward from the clearance groove 122 to the hook tip 111, with an inclination angle of 30°. When the tongue of the latch needle 2 slides in the needle groove 121, it guides the tongue of the latch needle 2 to move towards the needle hook 11. The presence of the clearance groove allows the main needle bar to avoid the latch needle, reducing the resistance to the latch needle and giving the latch needle a wider structural design space, making it less prone to damage. It can also be guided to the needle hook through the guide slope, leaving a space 3 for yarn storage between the latch needle and the needle hook (reference). Figure 6 ).
[0048] In this embodiment, the clearance groove is a through rectangular hole, and two clearance grooves are set at intervals along the length of the main needle bar 12. An arc-shaped groove bottom 1221 is set between the two clearance grooves 122 (at this time, only the corresponding position of the tongue needle needs to be processed). The existence of the arc-shaped groove bottom 1221 can strengthen the strength of the main needle bar itself. At the same time, it can also lift the tongue needle in the working state, ensuring that there is space 3 for yarn storage between the tongue needle and the needle hook.
[0049] For ease of distinction, the portion of the main needle bar 12 with the needle groove 121 is referred to as 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 referred to as the solid portion. (See reference...) Figure 3 A relatively long limiting rod 123 is provided at the solid part on the left side of the needle groove. The length of the limiting rod is generally greater than or equal to 5mm. A U-shaped groove is formed between the limiting rod 123 and the solid part at a certain distance, so that the limiting rod 123 has a certain elasticity. A limiting protrusion 1231 is provided at the end of the limiting rod 123 near the needle groove. The limiting protrusion 1231 can be used to lock or clamp the tongue needle 2. When not pushed by external force, the tongue needle 2 can be restricted by the limiting protrusion, so as to ensure that it does not fall out of the needle groove due to the vibration of the machine in the returned state (i.e., when the tongue needle does not move).
[0050] As a preferred option, such as Figure 5 As shown, a raised arc edge 1212 is provided on the needle groove wall at one end of the limiting rod 123. The raised arc edge is also used to lift the tongue needle when it moves, so that there is a space 3 for yarn storage between the tongue needle and the needle hook.
[0051] As a preferred option, such as Figure 7 As shown, a recessed positioning arc 124 is provided below the limiting protrusion 1231, which can better cooperate with the engagement and disengagement of the tongue needle.
[0052] The above are merely specific embodiments of the present invention. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in the present invention are for reference only and are not absolute limitations. Any non-substantial modifications made using the present invention shall be considered as infringing upon the protection scope of the present invention.
Claims
1. A main needle structure for a composite needle used in a knitting machine: comprising a needle hook and a main needle bar, the needle hook being disposed at the end of the main needle bar, and a needle groove being formed on the end face of the main needle bar corresponding to the tip of the needle hook, characterized in that: The part of the main needle bar with a needle groove is called the needle groove part. One end of the needle groove part is connected to the aforementioned needle hook, and the other end of the needle groove part is connected to the solid part. A limiting rod is provided at the solid part, and the limiting rod has elastic deformation capability. A limiting protrusion is provided at the end of the limiting rod near the needle groove part, and the limiting protrusion can engage and position the tongue needle of the composite needle. The bottom of the needle groove is also provided with a clearance groove, which is a through groove structure. A guide slope is provided on the side of the needle groove near the needle hook, and the inclination direction of the guide slope is from the clearance groove to the hook tip.
2. The main needle structure of a composite needle for a knitting machine according to claim 1, characterized in that: A reinforcing member is provided in the clearance groove, which makes the clearance groove spaced apart along the length of the main needle rod.
3. The main needle structure of a composite needle for a knitting machine according to claim 2, characterized in that: The reinforcing component has an arc-shaped groove bottom, which divides the clearance groove into two parts.
4. The main needle structure of a composite needle for a knitting machine according to claim 1, characterized in that: When the compound needle is in the return position, the clearance groove allows the tongue of the compound needle to be flush with the bottom of the main needle shaft; When the composite needle is in working condition, the guide bevel can guide the tongue of the composite needle to slide towards the hook tip, and allow the tongue to be separated from the hook tip. During this process, there is always space between the needle hook and the tongue for the yarn to be stored.
5. The main needle structure of a composite needle for a knitting machine according to claim 1, characterized in that: The clearance groove can be a rectangular hole, an elliptical hole, or a strip hole.
6. The main needle structure of a composite needle for a knitting machine according to claim 1, characterized in that: The needle groove wall at the end away from the needle hook has a raised arc edge.
7. The main needle structure of a composite needle for a knitting machine according to claim 1, characterized in that: The length of the limit rod is greater than or equal to 5mm.
8. The main needle structure of a composite needle for a knitting machine according to claim 1, characterized in that: The two sides of the hook gradually converge at the hook tip.
9. The main needle structure of a composite needle for a knitting machine according to claim 1, characterized in that: The inclination angle of the guide ramp relative to the bottom of the groove is 15-35°.
10. The main needle structure of a composite needle for a knitting machine according to claim 1, characterized in that: A recessed positioning arc is provided below the limiting protrusion.