Synchronously-adjusted needle selection piece frame body
By designing a synchronously adjustable needle selector holder and utilizing a cam adjustment mechanism and a pushing mechanism, the problem of low needle gap adjustment efficiency when needle selectors of different specifications and thicknesses are inserted is solved. This achieves precise adjustment of the needle gap and stable pushing of the needle selectors, thereby improving production efficiency and equipment adaptability.
Patent Information
- Application Number
- CN202520490751.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-19
AI Technical Summary
In the existing technology, when selecting needles of different specifications and thicknesses are inserted into the needle holder, the needle gap needs to be adjusted one by one, which results in low efficiency and lack of flexibility, making it difficult to meet the production needs of personalized patterns.
Design a synchronously adjustable needle selector holder, employing a needle selector pushing mechanism and a cam adjustment mechanism. The cam adjustment mechanism works in conjunction with the needle exit control rod to achieve synchronous adjustment of the needle exit gap. Combined with structures such as a movable through slot, rotating shaft, spring seat, and bearing seat, the precise adjustment and stability of the needle exit gap are ensured.
It enables synchronous adjustment of multiple needle gaps, improves the adaptability and production efficiency of the needle ejector machine to different needle selectors, ensures accurate and stable needle selection, and extends the service life of the equipment.
Smart Images
Figure CN223936728U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of automatic needle selection device, and in particular to a synchronously adjustable needle selection frame. Background Technology
[0002] In the textile manufacturing industry, knitting processes can create diverse fabric textures by arranging and combining different types of needle picks. As a core component of knitting machines, the arrangement of the needle picks directly determines the pattern, density, and structural characteristics of the fabric. With the increasing demand for personalized and complex textures in the textile industry, the flexibility and efficiency of needle pick arrangement have become important factors affecting production efficiency and product competitiveness.
[0003] In related technologies, needle selector strips can be arranged using a needle stacking machine. The needle stacking machine has multiple needle selector strip holders for holding different types of needle selector strips. Based on mechanical structure and precision control, the machine can achieve the effect of dispensing needle selector strips from each holder in a specific order and then controlling their arrangement sequence.
[0004] Regarding the aforementioned technologies, the needle selection plate holder has a needle ejection gap for ejecting individual needle selection plates. The thickness of the needle selection plates varies depending on the batch and specifications. Therefore, when the specifications of the needle selection plates inserted into the holder change, the needle ejection gap on the holder needs to be adjusted accordingly to ensure that the size of the needle ejection gap is compatible with the thickness of the needle selection plate. Utility Model Content
[0005] To facilitate the synchronous adjustment of the needle exit gap of each needle selector frame on the needle sorting machine, this application provides a synchronously adjustable needle selector frame.
[0006] The synchronously adjustable needle holder provided in this application adopts the following technical solution:
[0007] A synchronously adjustable needle selector holder includes a needle selector holder, a needle selector pushing mechanism, and a cam adjusting mechanism disposed on the needle selector holder.
[0008] The needle selection plate frame includes a material rack support, two guide pillars symmetrically arranged on the material rack support, a connecting side plate installed on the material rack support and used to fix the two guide pillars, and a needle selection plate guide plate located near the upper end of the guide pillars. The material rack support has a needle release control rod on its side wall for supporting the needle selection plate. A needle release gap is left between the upper side of the needle release control rod and the lower side of the guide pillar for a single needle selection plate to pass through.
[0009] The needle selection plate pushing mechanism is located on the connecting side plate for pushing a single needle selection plate out of the needle exit gap;
[0010] The cam adjustment mechanism is located on both sides of the material rack support and is used to cooperate with the needle output control rod to adjust the size of the needle output gap.
[0011] By adopting the above technical solution, the needle selection plate frame structure is rationally designed, including components such as the material rack support, guide pillars, connecting side plates, and needle selection plate guide plates. This provides a stable placement and guiding structure for the needle selection plates. The setting of the needle dispensing control rod and the reasonable allowance for the needle dispensing gap ensure that the needle selection plates remain stable during the pushing process, facilitating the accurate dispensing of individual needle selection plates by the needle selection plate pushing mechanism. By setting cam adjustment mechanisms on both sides of the material rack support, the needle dispensing gap can be adjusted in conjunction with the needle dispensing control rod. This allows for synchronous adjustment of the needle dispensing gap of each needle selection plate frame on the needle stacking machine, meeting the needle dispensing requirements of different batches, specifications, and thicknesses of needle selection plates, and improving the adaptability of the needle stacking machine to different needle selection plates.
[0012] Furthermore, the material rack support has a movable through groove on its side wall for the needle extension control rod to pass through and move. The height of the movable through groove is greater than the thickness of the needle extension control rod, and the needle extension control rod moves within the movable through groove to adjust the size of the needle extension gap.
[0013] By adopting the above technical solution, the movable through slot provides a spatial basis for the movement of the needle ejection control rod, allowing the rod to be adjusted in position, thus creating conditions for adjusting the needle ejection gap. Because the height of the movable through slot is greater than the thickness of the needle ejection control rod, the rod has sufficient room for movement and can move flexibly in the vertical direction according to the different thicknesses of the needle selector, precisely adjusting the needle ejection gap to suit different specifications of needle selector plates.
[0014] Furthermore, the material rack support has a rotating shaft passing through the side wall of the movable through groove for movably connecting the needle dispensing control rod. The material rack support has a spring seat on its outer wall for cooperating with the needle dispensing control rod. The spring seat has a spring on its upper side for abutting against the lower side of the needle dispensing control rod.
[0015] By adopting the above technical solution, the rotating shaft makes the adjustment of the needle ejection control lever more effortless and timely. Through the lever principle, a relatively small force can achieve a large displacement adjustment of the needle ejection control lever. The movable connection of the lever allows for more precise control of the movement of the needle ejection control lever, thereby more accurately adjusting the size of the needle ejection gap to accommodate needle selector plates of different thicknesses, ensuring the accuracy and stability of the needle selector plate's push. The spring seat and spring provide stable support for the needle ejection control lever. The spring always abuts against the lower side of the needle ejection control lever. When the needle ejection control lever is subjected to pressure from the needle selector plate or other external forces, the spring acts as a buffer, preventing damage or positional displacement of the needle ejection control lever due to excessive impact. Simultaneously, the elastic force of the spring allows the needle ejection control lever to maintain a stable position after adjustment, preventing it from moving during operation due to vibration or other factors, ensuring the stability of the needle ejection gap.
[0016] Furthermore, the cam adjustment mechanism includes an adjustment cam and a cam spindle;
[0017] The adjusting cam has a fixed wheel and an adjusting wheel arranged side by side and rotatably connected. Both the fixed wheel and the adjusting wheel are sleeved on the outside of the cam spindle. The fixed wheel is fixedly connected to the cam spindle, and the adjusting wheel is rotatably connected to the cam spindle. The outer wall of the adjusting wheel abuts against the upper side of the needle-out control rod.
[0018] By adopting the above technical solution, the fixed wheel is fixedly connected to the cam spindle, providing a stable support and transmission foundation for the entire adjusting cam. During the adjustment of the needle ejection control lever by the adjusting wheel, the fixed wheel ensures the overall stability of the adjusting cam, making the rotation of the adjusting wheel smoother and more reliable. Through the rotational connection between the adjusting wheel and the cam spindle, and the abutment between the outer wall of the adjusting wheel and the upper side of the needle ejection control lever, the operator can precisely control the position of the needle ejection control lever by rotating the adjusting wheel. Because the adjusting wheel and the fixed wheel are arranged side-by-side and rotatably connected, this structure enables fine-tuning, allowing for extremely precise adjustment of the needle ejection gap according to the thickness requirements of different needle selector plates, ensuring that the needle selector plate can pass through with a suitable gap.
[0019] Furthermore, the material rack support is symmetrically arranged on both sides and fixedly connected to two bearing seats for mounting the cam spindle. Each bearing seat is provided with a roller bearing for cooperating with the cam spindle. The number of cam spindles is at least two, and the two cam spindles are respectively passed through the two bearing seats on both sides of the material rack support.
[0020] By adopting the above technical solution, the bearing housings are symmetrically arranged on both sides of the material rack support and fixedly connected, providing a stable mounting foundation for the cam spindle. The roller bearings, in conjunction with the cam spindle, can withstand large radial loads, reducing the wobbling and offset of the cam spindle during rotation, ensuring that the cam spindle maintains a stable rotational state during operation. This ensures that the adjusting cam (including the fixed wheel and the adjusting wheel) can accurately adjust the needle exit control lever, improving the accuracy and reliability of the needle exit gap adjustment.
[0021] Furthermore, each of the cam spindles has multiple adjusting cams, and each cam spindle is provided with a synchronous drive motor at its end for synchronously controlling each of the adjusting cams.
[0022] By adopting the above technical solution, multiple adjusting cams are set on the same cam spindle, allowing simultaneous adjustment of multiple needle ejection control levers. A synchronous drive motor at the end ensures that these adjusting cams rotate synchronously, thereby achieving synchronous adjustment of multiple needle ejection gaps. This significantly improves adjustment efficiency, avoids the time wasted adjusting each needle ejection gap individually, and ensures the consistency of needle ejection gap adjustments, enabling uniform adjustment of the needle ejection gap across the entire needle selector frame.
[0023] Furthermore, the needle selection push mechanism includes a needle selection push block and a needle push cylinder mounted on the connecting side plate for driving the needle selection push block. The connecting side plate has a cylinder support plate fixedly connected to its side wall for mounting the needle push cylinder. The cylinder support plate is provided with a support plate reinforcing rib for cooperating with the connecting side plate.
[0024] By adopting the above technical solution, the needle-push-down cylinder drives the needle-selection piece pusher block, providing stable and precise power to accurately push individual needle-selection pieces. The needle-push-down cylinder is highly controllable, allowing precise control of the pusher block's stroke and speed according to actual production needs, ensuring the needle-selection piece is pushed out of the needle gap with appropriate force and position, thus improving the accuracy of needle-selection piece arrangement. The needle-push-down cylinder is mounted by fixing a cylinder support plate to the side wall of the connecting side plate, providing a stable mounting foundation for the cylinder. The reinforcing ribs on the cylinder support plate cooperate with the connecting side plate, effectively enhancing the structural strength of the entire needle-selection piece pushing mechanism.
[0025] Furthermore, the needle selection plate pusher has a connecting plate body for connecting with the piston rod of the needle plate push-down cylinder and a pusher rod symmetrically arranged on both sides of the connecting plate body for cooperating with the needle release control rod. The two pusher rods are located between the two needle release control rods and are respectively arranged adjacent to the two needle release control rods.
[0026] By adopting the above technical solution, the connecting plate is connected to the piston rod of the needle-push-down cylinder, which can stably transmit the power of the cylinder. The symmetrically arranged needle-push supports cooperate with the needle-exit control rods and are located between and adjacent to the two needle-exit control rods, allowing the needle-push supports to accurately act on the needle-selector plate, pushing it out of the needle-exit gap. The symmetrical arrangement of the needle-push supports and their adjacent cooperation with the needle-exit control rods ensures that the needle-selector plate is supported by the needle-exit control rods on both sides before being pushed out, preventing it from falling incorrectly.
[0027] Furthermore, both guide posts are perpendicular to the platform and a slot matching the length of the needle selection piece is left between the two guide posts. Both guide posts have U-shaped grooves along their length on their adjacent sides for the end of the needle selection piece to be inserted and slid.
[0028] By adopting the above technical solution, the U-shaped chute enables precise positioning of the needle selector's end. After the end of the needle selector is engaged in the U-shaped chute, its horizontal movement is restricted, allowing it to slide stably along the length of the guide posts, ensuring accurate positioning of the needle selector on the needle selector frame. The perforated groove between the two guide posts matches the length of the needle selector, providing a stable conveying channel. Within the perforated groove, the needle selector, constrained by the guide posts on both sides, maintains a stable posture and is less prone to shaking or flipping during conveying.
[0029] In summary, this application includes at least one of the following beneficial technical effects:
[0030] 1. By setting cam adjustment mechanisms on both sides of the material rack support, the position of the needle dispensing control rod can be precisely fine-tuned by the rotational connection between the adjustment wheel and the cam spindle. The needle dispensing gap can be accurately adjusted according to the thickness of the needle selection piece. Multiple adjustment cams are set on the same cam spindle and controlled by a synchronous drive motor, which can realize the synchronous adjustment of multiple needle dispensing gaps, improve adjustment efficiency and consistency, meet the needle dispensing requirements of different needle selection pieces, and enhance the adaptability of the needle packing machine to different needle selection pieces.
[0031] 2. In the needle selection plate pushing mechanism, the needle plate pushing cylinder has strong controllability and can provide stable and precise power to control the stroke and speed of the push block, accurately pushing the needle selection plate out of the needle exit gap. The connecting plate of the needle selection plate push block and the push rod structure can stably transmit the cylinder power and accurately act on the needle selection plate. Moreover, the push rod cooperates with the needle exit control rod to support the needle selection plate before pushing to prevent it from falling, ensuring the stability and accuracy of pushing and improving the needle selection plate arrangement accuracy.
[0032] 3. The overall structure of the needle selector frame provides a stable placement and guiding structure for the needle selector. The bearing housing and roller bearing cooperate to provide a stable mounting base for the cam spindle, reducing its shaking and offset during rotation. The cylinder support plate and support plate reinforcing ribs enhance the structural strength of the needle selector pushing mechanism. The U-shaped groove on the guide column accurately positions the end of the needle selector, and the hollow groove provides a stable conveying channel for the needle selector, ensuring that the needle selector is accurately positioned on the frame and conveyed stably. This improves the overall stability and reliability of the equipment operation and extends the service life of the equipment. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the overall structure of a synchronously adjustable needle holder according to an embodiment of this application.
[0034] Figure 2 This is a schematic diagram of the overall structure of the needle holder in the embodiment of this application.
[0035] Figure 3 This is a cross-sectional structural diagram of the needle holder in an embodiment of this application.
[0036] Figure 4 yes Figure 3 A magnified schematic diagram of the needle gap in section A.
[0037] Figure 5 This is a schematic diagram of the overall structure of the needle selection plate pusher and the needle dispensing control rod in the embodiments of this application.
[0038] Figure 6 This is a partial structural diagram of the cam adjustment mechanism in the embodiments of this application. Figure 1 .
[0039] Figure 7 This is a partial structural diagram of the cam adjustment mechanism in the embodiments of this application. Figure 2 .
[0040] Explanation of reference numerals in the attached drawings: 1. Needle selection plate frame; 11. Material rack support; 111. Movable through groove; 12. Guide post; 121. Hollowed-out groove; 122. U-shaped slide groove; 13. Connecting side plate; 14. Needle selection plate guide plate; 15. Needle exit control rod; 151. Needle exit gap; 152. Rotating shaft; 16. Spring seat; 161. Spring; 17. Bearing seat; 171. Roller bearing; 2. Needle selection plate pushing mechanism; 21. Needle selection plate push block; 211. Connecting plate body; 212. Needle push support rod; 22. Needle plate push cylinder; 221. Cylinder support plate; 222. Support plate reinforcing rib; 3. Cam adjustment mechanism; 31. Adjusting cam; 311. Fixed wheel; 312. Adjusting wheel; 32. Cam spindle; 33. Synchronous drive motor. Detailed Implementation
[0041] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-7 The present application will be further described in detail with reference to the embodiments.
[0042] This application discloses a synchronously adjustable needle holder 1. (Refer to...) Figure 1 The synchronously adjustable needle selector holder 1 includes a needle selector holder 1, a needle selector pushing mechanism 2, and a cam adjusting mechanism 3. Both the needle selector pushing mechanism 2 and the cam adjusting mechanism 3 are located on the needle selector holder 1.
[0043] Reference Figure 2 and Figure 3 The needle selection plate holder 1 includes a material rack support 11, guide posts 12, connecting side plates 13, needle selection plate guide plates 14, and needle dispensing control rods 15. The material rack support 11 is fixedly connected to the table of the needle dispensing machine. In this embodiment, there are two guide posts 12, symmetrically arranged on the material rack support 11. Both guide posts 12 are perpendicular to the table, and a slot 121 matching the length of the needle selection plate is left between the two guide posts 12. U-shaped grooves 122 are opened along the length direction on the two sides of the two guide posts 12 that are close to each other, so that the end of the needle selection plate can be inserted and slid. The connecting side plates 13 are installed on the material rack support 11 and are used to fix the two guide posts 12. The needle selection plate guide plates 14 are located near the upper end of the guide posts 12 to guide the insertion of the needle selection plates.
[0044] The material rack support 11 has a movable through slot 111 on its side wall for the needle control rod 15 to pass through and move. A needle gap 151 is left between the upper side of the needle control rod 15 and the lower side of the guide post 12 to allow a single needle selection piece to pass through. The needle selection piece pushing mechanism 2 is installed on the connecting side plate 13 to push the single needle selection piece out of the needle gap 151.
[0045] Reference Figure 3 and Figure 4 The needle selection push mechanism 2 includes a needle selection push block 21 and a needle push cylinder 22 mounted on the connecting side plate 13 for driving the needle selection push block 21. The connecting side plate 13 has a cylinder support plate 221 fixedly connected to its side wall for mounting the needle push cylinder 22. The cylinder support plate 221 is provided with a support plate reinforcing rib 222 for cooperating with the connecting side plate 13.
[0046] Combination Figure 5The needle selection plate pusher block 21 has a connecting plate 211 for connecting to the piston rod of the needle plate push-down cylinder 22 and two pusher rods 212 symmetrically arranged on both sides of the connecting plate 211 for cooperating with the needle exit control rods 15. The two pusher rods 212 are located between and adjacent to the two needle exit control rods 15. The connecting plate 211 is connected to the piston rod of the needle plate push-down cylinder 22, enabling stable transmission of the cylinder's power. The symmetrically arranged pusher rods 212 cooperate with the needle exit control rods 15 and are located between and adjacent to the two needle exit control rods 15, allowing the pusher rods 212 to accurately act on the needle selection plate, pushing the needle selection plate out of the needle exit gap 151. The symmetrical arrangement of the pusher rods 212 and their adjacent cooperation with the needle exit control rods 15 ensures that the needle selection plate is supported by the needle exit control rods 15 on both sides before being pushed out, preventing accidental drop.
[0047] Reference Figure 3 and Figure 4 The height of the movable channel 111 is greater than the thickness of the needle ejection control rod 15. The needle ejection control rod 15, while supporting the needle selector within the movable channel 111, can also move within the channel to adjust the size of the needle ejection gap 151. A rotating shaft 152, movably connected to the needle ejection control rod 15, is provided on the side wall of the material rack support 11 within the movable channel 111. The rotating shaft 152, through the lever principle, allows for displacement adjustment of the needle ejection control rod 15 by applying a small force. This movable connection method allows for more precise control of the movement of the needle ejection control rod 15, thereby more accurately adjusting the size of the needle ejection gap 151 to accommodate needle selector plates of different thicknesses, ensuring the accuracy and stability of the needle selector plate delivery.
[0048] Reference Figure 6 and Figure 7 The material rack support 11 has a spring seat 16 on its outer wall for cooperating with the needle ejection control rod 15. The spring seat 16 has a spring 161 on its upper side for abutting against the lower side of the needle ejection control rod 15. The spring seat 16 and spring 161 provide stable support for the needle ejection control rod 15. The spring 161 always abuts against the lower side of the needle ejection control rod 15. When the needle ejection control rod 15 is subjected to pressure from the needle selection plate or other external forces, the spring 161 acts as a buffer, preventing damage or displacement of the needle ejection control rod 15 due to excessive impact.
[0049] The cam adjustment mechanism 3 is located on both sides of the material rack support 11 and is used to cooperate with the needle dispensing control rod 15 to adjust the size of the needle dispensing gap 151. The cam adjustment mechanism 3 includes an adjusting cam 31 and a cam spindle 32. The adjusting cam 31 has a fixed wheel 311 and an adjusting wheel 312 arranged side by side and rotatably connected. Both the fixed wheel 311 and the adjusting wheel 312 are sleeved on the outside of the cam spindle 32. The fixed wheel 311 is fixedly connected to the cam spindle 32, providing a stable support and transmission foundation for the entire adjusting cam 31. During the process of the adjusting wheel 312 adjusting the needle dispensing control rod 15, the fixed wheel 311 can ensure the overall stability of the adjusting cam 31, making the rotation of the adjusting wheel 312 more smooth and reliable.
[0050] The adjusting wheel 312 is rotatably connected to the cam spindle 32, and the outer wall of the adjusting wheel 312 abuts against the upper side of the needle ejection control rod 15. The position of the needle ejection control rod 15 can be precisely controlled by rotating the adjusting wheel. The adjusting wheel 312 and the fixed wheel 311 are arranged side by side and rotatably connected, which can realize the fine adjustment function and adjust the size of the needle ejection gap 151 with extreme precision according to the thickness requirements of different needle selection plates.
[0051] The material rack support 11 has two bearing seats 17 symmetrically arranged and fixedly connected on both sides for mounting cam spindles 32. Each bearing seat 17 contains a roller bearing 171 for cooperating with the cam spindle 32. There are two cam spindles 32, which are respectively mounted on the two bearing seats 17 on both sides of the material rack support 11. Each cam spindle 32 has multiple adjusting cams 31. The cam spindle 32 has a synchronous drive motor 33 at its end for synchronously controlling each adjusting cam 31. The synchronous drive motor 33 is mounted on the platform.
[0052] The implementation principle of the synchronously adjustable needle selection plate holder 1 in this application embodiment is as follows: The needle selection plate holder 1 is used to guide the needle selection plate into place. In the needle selection plate pushing mechanism 2, the needle plate pushing cylinder 22 drives the needle selection plate pushing block 21. The connecting plate 211 of the needle selection plate pushing block 21 is connected to the cylinder piston rod to transmit power. The symmetrical needle pushing support rods 212 are located between the two needle exit control rods 15 and are arranged adjacent to each other. They act accurately on the needle selection plate and push it out from the needle exit gap 151. The needle exit control rods 15 can support the needle selection plate before pushing to prevent it from falling.
[0053] The height of the movable through groove 111 on the side wall of the material rack support 11 is greater than the thickness of the needle extension control rod 15, allowing the needle extension control rod 15 to move within the groove. The needle extension control rod 15 is displaced via a rotating shaft 152 within the movable through groove 111, precisely controlling its movement and adjusting the needle extension gap 151 to accommodate needle selection plates of different thicknesses. The spring seat 16 and spring 161 on the outer wall of the material rack support 11 cooperate with the needle extension control rod 15. The spring 161 always abuts against the lower side of the needle extension control rod 15, providing stable support and acting as a buffer when the needle extension control rod 15 is subjected to external force, preventing damage or displacement.
[0054] The adjusting cam 31 of the cam adjusting mechanism 3 is composed of a fixed wheel 311 and an adjusting wheel 312 connected in parallel and rotating. It is sleeved on the outside of the cam spindle 32. The fixed wheel 311 is fixed to the cam spindle 32 to ensure the overall stability of the adjusting cam 31. The adjusting wheel 312 is rotatably connected to the cam spindle 32 and its outer wall abuts against the upper side of the needle delivery control rod 15. Rotating the adjusting wheel 312 can precisely control the position of the needle delivery control rod 15, realizing fine adjustment. The symmetrical bearing seats 17 and roller bearings 171 on both sides provide a stable mounting base for the cam spindle 32. Multiple adjusting cams 31 on the cam spindle 32 are synchronously controlled by the synchronous drive motor 33 at the end to realize the synchronous adjustment of multiple needle delivery gaps 151 to meet the needle delivery requirements of different needle selection plates.
[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A synchronously adjustable needle holder (1), characterized in that: It includes a needle selection plate holder (1) and a needle selection plate pushing mechanism (2) and a cam adjustment mechanism (3) disposed on the needle selection plate holder (1); The needle selection plate frame (1) includes a material rack support (11), two guide pillars (12) symmetrically arranged on the material rack support (11), a connecting side plate (13) installed on the material rack support (11) and used to fix the two guide pillars (12), and a needle selection plate guide plate (14) arranged near the upper end of the guide pillars (12). The material rack support (11) has a needle release control rod (15) on its side wall for supporting the needle selection plate. A needle release gap (151) is left between the upper side of the needle release control rod (15) and the lower side of the guide pillar (12) for a single needle selection plate to pass through. The needle selection plate pushing mechanism (2) is provided on the connecting side plate (13) for pushing the single needle selection plate out of the needle outlet gap (151); The cam adjustment mechanism (3) is located on both sides of the material rack support (11) and is used to cooperate with the needle control rod (15) to adjust the size of the needle gap (151).
2. The synchronously adjustable needle holder (1) according to claim 1, characterized in that: The material rack support (11) has a movable through groove (111) on its side wall for the needle control rod (15) to pass through and move. The height of the movable through groove (111) is greater than the thickness of the needle control rod (15). The needle control rod (15) moves within the movable through groove (111) to adjust the size of the needle gap (151).
3. The synchronously adjustable needle holder (1) according to claim 2, characterized in that: The material rack support (11) has a rotating shaft (152) that is movably connected to the needle control rod (15) on the side wall of the movable through groove (111). The material rack support (11) has a spring seat (16) on its outer wall for cooperating with the needle control rod (15). The spring seat (16) has a spring (161) on its upper side for abutting against the lower side of the needle control rod (15).
4. The synchronously adjustable needle holder (1) according to claim 3, characterized in that: The cam adjustment mechanism (3) includes an adjustment cam (31) and a cam spindle (32); The adjusting cam (31) has a fixed wheel (311) and an adjusting wheel (312) arranged side by side and rotatably connected. The fixed wheel (311) and the adjusting wheel (312) are both sleeved on the outside of the cam spindle (32). The fixed wheel (311) is fixedly connected to the cam spindle (32), and the adjusting wheel (312) is rotatably connected to the cam spindle (32). The outer wall of the adjusting wheel (312) abuts against the upper side of the needle control rod (15).
5. The synchronously adjustable needle holder (1) according to claim 4, characterized in that: The material rack support (11) is symmetrically arranged on both sides and fixedly connected to two bearing seats (17) for mounting the cam spindle (32). Each bearing seat (17) is provided with a roller bearing (171) for cooperating with the cam spindle (32). The number of cam spindles (32) is at least two, and the two cam spindles (32) are respectively passed through the two bearing seats (17) on both sides of the material rack support (11).
6. The synchronously adjustable needle holder (1) according to claim 5, characterized in that: The number of adjusting cams (31) on each of the cam spindles (32) is multiple, and the cam spindles (32) are provided at their ends with a synchronous drive motor (33) for synchronously controlling each of the adjusting cams (31).
7. The synchronously adjustable needle holder (1) according to claim 1, characterized in that: The needle selection push mechanism (2) includes a needle selection push block (21) and a needle push cylinder (22) installed on the connecting side plate (13) for driving the needle selection push block (21). The connecting side plate (13) has a cylinder support plate (221) fixedly connected to its side wall for mounting the needle push cylinder (22). The cylinder support plate (221) is provided with a support plate reinforcing rib (222) for cooperating with the connecting side plate (13).
8. The synchronously adjustable needle holder (1) according to claim 7, characterized in that: The needle selection push block (21) has a connecting plate (211) for connecting with the piston rod of the needle push cylinder (22) and a push rod (212) symmetrically arranged on both sides of the connecting plate (211) for cooperating with the needle release control rod (15). The two push rods (212) are located between the two needle release control rods (15) and are respectively adjacent to the two needle release control rods (15).
9. The synchronously adjustable needle holder (1) according to claim 1, characterized in that: Both guide posts (12) are set perpendicular to the platform and a hollow groove (121) matching the length of the needle selection piece is left between the two guide posts (12). Both guide posts (12) have U-shaped grooves (122) along the length direction on their two sides that are close to each other, for the end of the needle selection piece to be inserted and slide.