Single-cam needle lifting mechanism for jacquard

Abstract

A single cam needle lifting mechanism of a jacquard machine relates to the technical field of textile industry. The single cam needle lifting mechanism of the jacquard machine comprises a base, a tensioning roller is rotatably connected above the base, warp yarns are distributed on the tensioning roller, a threading ring is sleeved on the warp yarns, a pull rod is fixedly installed on the upper end of the threading ring, the threading ring is slidably connected below the base, a spring is sleeved below the threading ring, a support is fixedly installed on the base, two guide rail grooves are symmetrically formed at the two ends of the support, a sliding block is slidably connected in the two guide rail grooves, a rotating shaft is rotatably connected on the support, cams are fixedly installed at the two ends of the rotating shaft, a connecting rod is rotatably connected on the cam, and a push rod is rotatably connected at the other end of the connecting rod. The device is stable and efficient in work, the servo motor drives the rotating shaft to rotate through the driving sprocket, the chain and the driven sprocket, the transmission is accurate, the motion law of the cam is stable, and the actions of the sliding block and the pull rod are consistent, so that the needle lifting precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of textile industry technology, and in particular to a single cam needle lifting mechanism for a jacquard machine. Background Technology

[0002] In the traditional jacquard loom needle lifting mechanism, there is often a problem of insufficient transmission stability. During the power transmission process, sluggishness or shaking is likely to occur, resulting in inconsistent needle lifting rhythm, affecting the regularity of warp yarn interlacing, and thus causing deviations in the weaving pattern.

[0003] During the needle lifting process, the lack of stable tension control of the warp yarns makes them prone to positional deviation due to slack or excessive pulling. This not only reduces the accuracy of the needle lifting position but may also cause warp yarn wear or even breakage, increasing material waste and the frequency of machine downtime for adjustment.

[0004] Meanwhile, the reset structure design of traditional mechanisms is not reasonable enough. After the needle is lifted, the components cannot quickly and accurately return to the initial position, which can easily cause the action to jam, affecting the smoothness of continuous needle lifting and reducing the overall knitting efficiency. In addition, traditional mechanisms have poor adjustment flexibility and cannot easily change the needle lifting action according to the knitting needs of different patterns. If adjustments are needed, multiple components often need to be disassembled and replaced, which is complicated and time-consuming, making it difficult to adapt to diverse knitting needs.

[0005] In addition, the movement guidance of the needle lifting component is not stable enough, and it is prone to deviation due to uneven force, which further aggravates the error in needle lifting accuracy, resulting in a decline in the quality of knitted products and an increase in the workload of subsequent finishing processes. Summary of the Invention

[0006] The present invention aims to solve the technical problems existing in the prior art and provide a single cam needle lifting mechanism for a jacquard machine.

[0007] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a single cam needle lifting mechanism for a jacquard machine, including a base, three tension rollers are rotatably connected above the base, warp yarns are tensioned on the tension rollers, a threading ring is sleeved on the warp yarns, a pull rod is fixedly installed at the upper end of the threading ring, the threading ring is slidably connected to the base below, a spring is sleeved below the threading ring, and the two ends of the spring are respectively fixedly installed on the base and the threading ring;

[0008] A bracket is fixedly installed on the base, a telescopic rod is fixedly installed on one side of the bracket, the middle part of the telescopic rod is sleeved on the pull rod, a spring is fixedly installed at the tail of the telescopic rod, and the other end of the spring is fixedly installed on the other side of the bracket.

[0009] An air pump is fixedly installed on the outside of the bracket, and the output end of the air pump is fixedly installed on the input end of the telescopic rod; two guide rail grooves are symmetrically opened at both ends of the bracket, and sliders are slidably connected in the two guide rail grooves, with the pull rod tightly engaged on the sliders;

[0010] A rotating shaft is rotatably connected to the bracket. Cams are fixedly installed at both ends of the rotating shaft. A connecting rod is rotatably connected to the cam. A push rod is rotatably connected to the other end of the connecting rod. The other end of the push rod is rotatably connected to the slider.

[0011] A driven sprocket is fixedly installed in the middle of the shaft, a servo motor is fixedly installed on the bracket, and a driving sprocket is fixedly installed on the output shaft of the servo motor. The driving sprocket and the driven sprocket are connected by a chain meshing.

[0012] Preferably, the number of tensioning rollers is three, and they are staggered above the base to maintain the tension of the warp yarns.

[0013] Preferably, the threading ring is slidably connected to the base via a sliding pair to ensure that the threading ring slides in a straight line.

[0014] Preferably, the springs are respectively sleeved below the threaded loop and at the end of the telescopic rod to provide a restoring force and buffer the impact of movement.

[0015] Preferably, the air pump is connected to the input end of the telescopic rod via a pneumatic pipeline, and is used to drive the telescopic rod to extend or retract to adjust the relative position of the pull rod and the slider.

[0016] Preferably, the clearance between the slider and the guide rail groove is small, ensuring that the slider slides in the guide rail groove without significant shaking.

[0017] Preferably, the profile curve of the cam is a modified trapezoidal curve, with different slopes in its lift and return segments, in order to achieve rapid response and stable reset of the needle lifting action.

[0018] Preferably, the servo motor drives the rotating shaft to rotate through a transmission system consisting of a drive sprocket, a chain, and a driven sprocket, and the rotational speed of the cam matches the output speed of the servo motor.

[0019] The beneficial effects of this utility model are:

[0020] 1. The single cam needle lifting mechanism of this jacquard machine is stable and efficient. The servo motor drives the rotating shaft to rotate through the active sprocket, chain, and driven sprocket. The transmission is precise and ensures the stable motion of the cam, thereby making the actions of the slider, pull rod, etc. consistent and improving the needle lifting accuracy.

[0021] 2. The single-cam needle lifting mechanism of this jacquard machine ensures that the tensioning roller always keeps the warp yarn taut, preventing warp yarn deviation during needle lifting and ensuring accurate needle position. The spring below the threading ring and the spring at the end of the telescopic rod provide restoring force, ensuring that all components quickly return to their positions after the action is completed, and ensuring smooth circulation.

[0022] 3. The single-cam needle lifting mechanism of this jacquard machine features an air pump-driven telescopic rod that can adjust the needle lifting action, increasing its flexibility and adapting to different jacquard needs. The slider slides smoothly within the guide rail groove, reducing motion deviation. Combined with the cam's contour design, the needle lifting action is precise and controllable, improving the overall jacquard quality and efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a single-cam needle lifting mechanism for a jacquard machine according to the present invention;

[0024] Figure 2 This is a schematic diagram of a single-cam needle lifting mechanism for a jacquard machine according to the present invention;

[0025] Figure 3 This is a cross-sectional schematic diagram of a single-cam needle lifting mechanism for a jacquard machine according to the present invention;

[0026] Figure 4 This is a cross-sectional schematic diagram of a single-cam needle lifting mechanism for a jacquard machine according to the present invention.

[0027] Reference numerals in the attached diagram: 1. Base; 2. Tensioning roller; 3. Threading ring; 4. Bracket; 5. Guide rail groove; 6. Slider; 7. Rotating shaft; 8. Pull rod; 9. Telescopic rod; 10. Servo motor; 11. Driven sprocket; 12. Chain; 13. Drive sprocket; 14. Cam; 15. Connecting rod; 16. Push rod; 17. Spring; 18. Air pump. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0029] Example: A single-cam needle lifting mechanism for a jacquard machine, such as... Figures 1-4 As shown:

[0030] A single-cam needle lifting mechanism for a jacquard machine includes a base 1, three tension rollers 2 rotatably connected above the base 1, warp yarns tensioned on the tension rollers 2, threading rings 3 sleeved on the warp yarns, a pull rod 8 fixedly installed at the upper end of the threading ring 3, a sliding connection to the base 1 below the threading ring 3, and a spring 17 sleeved below the threading ring 3, with the two ends of the spring 17 fixedly installed on the base 1 and the threading ring 3 respectively.

[0031] A bracket 4 is fixedly installed on the base 1. A telescopic rod 9 is fixedly installed on one side of the bracket 4. The middle part of the telescopic rod 9 is sleeved on the pull rod 8. A spring 17 is fixedly installed at the tail of the telescopic rod 9. The other end of the spring 17 is fixedly installed on the other side of the bracket 4.

[0032] An air pump 18 is fixedly installed on the outside of the bracket 4, and the output end of the air pump 18 is fixedly installed on the input end of the telescopic rod 9.

[0033] The bracket 4 has two symmetrical guide rail grooves 5 at both ends, and sliders 6 are slidably connected in the two guide rail grooves 5. The pull rod 8 is tightly engaged with the sliders 6.

[0034] A rotating shaft 7 is rotatably connected to the bracket 4. Cams 14 are fixedly installed at both ends of the rotating shaft 7. A connecting rod 15 is rotatably connected to the cam 14. A push rod 16 is rotatably connected to the other end of the connecting rod 15. The other end of the push rod 16 is rotatably connected to the slider 6.

[0035] A driven sprocket 11 is fixedly installed in the middle of the rotating shaft 7, a servo motor 10 is fixedly installed on the bracket 4, a driving sprocket 13 is fixedly installed on the output shaft of the servo motor 10, and a chain 12 meshes and connects the driving sprocket 13 and the driven sprocket 11.

[0036] After the servo motor 10 is started, its output shaft drives the active sprocket 13 to rotate. The active sprocket 13 drives the driven sprocket 11 to rotate through the chain 12. The driven sprocket 11 drives the rotating shaft 7 to rotate synchronously on the bracket 4. When the rotating shaft 7 rotates, the cams 14 at both ends rotate together with the rotating shaft 7. The cams 14 push the connecting rod 15 to move. The connecting rod 15 drives the push rod 16 to swing. The push rod 16 then pushes the slider 6 to slide in a straight line in the guide groove 5 of the bracket 4.

[0037] Since the pull rod 8 is tightly attached to the slider 6, the slider 6 will drive the pull rod 8 to move synchronously when it slides. The pull rod 8 pulls the threading ring 3, and the threading ring 3 slides along the base 1 below. At this time, the spring 17 below the threading ring 3 is stretched, and the threading ring 3 drives the warp yarn to complete the needle lifting action.

[0038] At the same time, the air pump 18 on the bracket 4 drives the telescopic rod 9 to adjust the relative position of the pull rod 8 and the slider 6. The middle part of the telescopic rod 9 is sleeved on the pull rod 8, and the spring 17 at its tail cooperates with the telescopic rod 9 to facilitate reset. The telescopic rod 9 pushes the pull rod 8 horizontally, thereby causing the pull rod 8 to disengage from the slider 6 and change the needle lifting action.

[0039] When the cam 14 rotates to a specific profile segment, the connecting rod 15 and the push rod 16 drive the slider 6 to slide in the opposite direction. The threading ring 3 returns to its initial position under the restoring force of the lower spring 17, and the warp yarn is reset accordingly. The tension roller 2 always keeps the warp yarn in a tensioned state to ensure that the warp yarn position is stable during the needle lifting process.

[0040] Working principle: When in use, the servo motor 10 starts, driving the drive sprocket 13 to rotate, which in turn drives the driven sprocket 11 and the shaft 7 to rotate via the chain 12. The cam 14 rotates with the shaft 7 and pushes the connecting rod 15. The connecting rod 15 drives the push rod 16 to make the slider 6 slide in the guide groove 5. The slider 6 drives the pull rod 8 and the threading ring 3 to slide. The spring 17 below the threading ring 3 is stretched, and the warp yarn completes the needle lifting. The air pump 18 drives the telescopic rod 9 to adjust, which can change the needle lifting action. When the cam 14 reaches a specific contour section, the slider 6 slides in the opposite direction, and the threading ring 3 is reset under the action of the spring 17. The warp yarn is reset, and the tension roller 2 keeps the warp yarn tensioned.

[0041] The device operates stably and efficiently. The servo motor 10 drives the rotating shaft 7 to rotate through the active sprocket 13, chain 12, and driven sprocket 11. The transmission is precise, ensuring the stable motion of the cam 14, which in turn makes the slider 6, pull rod 8 and other actions consistent, thus improving the needle lifting accuracy.

[0042] The tension roller 2 keeps the warp yarns taut to prevent them from shifting when the needle is lifted, ensuring accurate needle position. The spring 17 below the threading ring 3 and the spring 17 at the end of the telescopic rod 9 provide restoring force to ensure that all components return to their positions quickly after the action is completed, ensuring smooth circulation.

[0043] The air pump 18 drives the telescopic rod 9 to adjust the needle lifting action, increasing the flexibility of use and adapting to different jacquard needs. The slider 6 slides smoothly in the guide rail groove 5, reducing motion deviation. Combined with the contour design of the cam 14, the needle lifting action is precise and controllable, improving the overall jacquard quality and efficiency.

[0044] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A single-cam needle lifting mechanism for a jacquard machine, comprising a base (1), characterized in that: Three tensioning rollers (2) are rotatably connected above the base (1). Warp yarns are tensioned on the tensioning rollers (2). A threading ring (3) is sleeved on the warp yarns. A pull rod (8) is fixedly installed on the upper end of the threading ring (3). The threading ring (3) is slidably connected to the base (1) below. A spring (17) is sleeved below the threading ring (3). The two ends of the spring (17) are fixedly installed on the base (1) and the threading ring (3) respectively. A bracket (4) is fixedly installed on the base (1), and a telescopic rod (9) is fixedly installed on one side of the bracket (4); An air pump (18) is fixedly installed on the outside of the bracket (4), and the output end of the air pump (18) is fixedly installed on the input end of the telescopic rod (9); A rotating shaft (7) is rotatably connected to the bracket (4). Cams (14) are fixedly installed at both ends of the rotating shaft (7). A connecting rod (15) is rotatably connected to the cam (14). A push rod (16) is rotatably connected to the other end of the connecting rod (15).

2. The single-cam needle lifting mechanism of a jacquard machine according to claim 1, characterized in that: The telescopic rod (9) is sleeved on the pull rod (8) in the middle, and a spring (17) is fixedly installed at the tail of the telescopic rod (9). The other end of the spring (17) is fixedly installed on the other side of the bracket (4).

3. The single-cam needle lifting mechanism of a jacquard machine according to claim 2, characterized in that: The bracket (4) has two guide rail grooves (5) symmetrically opened at both ends. A slider (6) is slidably connected in the two guide rail grooves (5), and the pull rod (8) is tightly engaged with the slider (6). The other end of the push rod (16) is rotatably connected to the slider (6).

4. The single-cam needle lifting mechanism of a jacquard machine according to claim 3, characterized in that: A driven sprocket (11) is fixedly installed in the middle of the shaft (7), a servo motor (10) is fixedly installed on the bracket (4), a drive sprocket (13) is fixedly installed on the output shaft of the servo motor (10), and a chain (12) meshes between the drive sprocket (13) and the driven sprocket (11).

5. The single-cam needle lifting mechanism of a jacquard machine according to claim 4, characterized in that: The springs (17) are respectively fitted below the threading ring (3) and at the tail of the telescopic rod (9); The threading ring (3) is slidably connected to the base (1) via a sliding pair below. There are three tension rollers (2), which are staggered and distributed above the base (1).

6. The single-cam needle lifting mechanism of a jacquard machine according to claim 5, characterized in that: The air pump (18) is connected to the input end of the telescopic rod (9) through a pneumatic pipeline and is used to drive the telescopic rod (9) to extend and retract to adjust the relative position of the pull rod (8) and the slider (6).

7. The single-cam needle lifting mechanism of a jacquard machine according to claim 6, characterized in that: The profile curve of the cam (14) is a modified trapezoidal curve.

8. The single-cam needle lifting mechanism of a jacquard machine according to claim 7, characterized in that: The servo motor (10) drives the rotating shaft (7) to rotate through a transmission system consisting of a drive sprocket (13), a chain (12) and a driven sprocket (11). The rotational speed of the cam (14) matches the output rotational speed of the servo motor (10).

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