Active yarn tension compensation device for warp knitting machine

Abstract

The present invention discloses an active yarn tension compensation device for a warp knitting machine. The warp knitting machine includes a transmission spindle and a loop forming spindle, the transmission spindle being rotatably mounted in an oil tank of the warp knitting machine. The loop forming spindle includes a groove needle loop forming spindle and a needle core loop forming spindle, the groove needle loop forming spindle and the needle core loop forming spindle being rotatably mounted on a warp knitting machine frame. The active yarn tension compensation device for the warp knitting machine includes a connecting rod, a compensation connecting rod, a tension rod, and a tension plate. The upper end of the connecting rod is rotatably connected to the left end of the compensation connecting rod, the right end of the compensation connecting rod is fixedly connected to the tension rod, the tension rod is rotatably mounted on the warp knitting machine frame, and the tension plate is fixedly mounted on the tension rod. The active yarn tension compensation device for the warp knitting machine also includes a compensation swing arm, the left end of the compensation swing arm being fixedly mounted on the groove needle loop forming spindle, and the right end of the compensation swing arm being rotatably connected to the lower end of the connecting rod. The present invention has a simple structure and is easy to assemble, and provides more accurate and stable yarn tension compensation.

Description

Technical Field

[0001] The invention relates to a yarn tension compensating device, in particular to an active yarn tension compensating device for adjusting yarn tension in a multi-comb warp knitting machine. Background Art

[0002] Existing yarn tension compensation devices for warp knitting machines, such as the one disclosed in Chinese Utility Model Patent No. 201020270550.2, comprise a transmission main shaft rotatably mounted within the warp knitting machine's oil tank, a tension rod rotatably mounted on the warp knitting machine frame, and a tension plate fixedly mounted on the tension rod. The device also includes an eccentric shaft rotatably mounted on the warp knitting machine frame, a connecting rod, a swing sleeve, and a transmission mechanism disposed between the transmission main shaft and the eccentric shaft. The swing sleeve has one end fixedly connected to the tension rod and the other end rotatably connected to the upper end of the connecting rod. The lower end of the connecting rod is rotatably connected to one end of the eccentric shaft, which is driven for rotation by the transmission main shaft via the transmission mechanism. The transmission mechanism disposed between the transmission main shaft and the eccentric shaft comprises a driving synchronous pulley fixedly mounted on the transmission main shaft, a driven synchronous pulley fixedly mounted on the eccentric shaft, an intermediate transition synchronous pulley rotatably mounted on the warp knitting machine's oil tank, and a timing belt disposed between the synchronous pulleys.

[0003] The yarn tension compensation device of this structure has the following disadvantages during production and use: since the compensation device requires a special transmission mechanism to be set between the transmission main shaft and the eccentric shaft for the rotation of the eccentric shaft, the special transmission mechanism is usually composed of an active synchronous wheel fixedly mounted on the transmission main shaft, a driven synchronous wheel fixedly mounted on the eccentric shaft, an intermediate transition synchronous wheel rotatably mounted on the warp knitting machine oil tank, and a synchronous belt arranged between the synchronous wheels. Therefore, the compensation device not only adds a large number of additional parts between the transmission main shaft and the eccentric shaft to rotate the eccentric shaft, resulting in a complex structure and difficult assembly, but also has a relatively large compensation force and inaccurate tension compensation; in addition, related parts such as the synchronous belt and synchronous wheel are easily damaged, and due to spatial limitations, maintenance is also relatively difficult, which reduces the production efficiency of the warp knitting machine and causes troubles for customers. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a positive yarn tension compensation device for a warp knitting machine which has a simple structure, is easy to assemble, convenient to maintain and debug, has more accurate and stable tension compensation, and does not require a special transmission mechanism to be set on the transmission main shaft specifically for tension compensation, thereby further improving the production efficiency of the warp knitting machine.

[0005] In order to solve the above technical problems, the present invention adopts such an active yarn tension compensation device for a warp knitting machine, the warp knitting machine includes a transmission main shaft and a loop forming main shaft, the transmission main shaft is rotatably installed in the warp knitting machine oil tank, the loop forming main shaft includes a groove needle loop forming main shaft and a needle core loop forming main shaft, the groove needle loop forming main shaft and the needle core loop forming main shaft are rotatably installed on the warp knitting machine frame, the active yarn tension compensation device of the warp knitting machine includes a connecting rod, a compensation connecting rod, a tension rod and a tension plate, the upper end of the connecting rod is rotatably connected to the left end of the compensation connecting rod, the right end of the compensation connecting rod is fixedly connected to the tension rod, the tension rod is rotatably installed on the warp knitting machine frame, and the tension plate is fixedly installed on the tension rod, the active yarn tension compensation device of the warp knitting machine also includes a compensation swing arm, the left end of the compensation swing arm is fixedly installed on the groove needle loop forming main shaft, and the right end of the compensation swing arm is rotatably connected to the lower end of the connecting rod.

[0006] As a preferred embodiment of the present invention, the transmission main shaft drives the groove needle loop forming main shaft to swing through the groove needle transmission mechanism, and the groove needle transmission mechanism includes an eccentric wheel, an eccentric sleeve connecting rod, a rocker arm, a main shaft connecting rod and a groove needle swing arm. The eccentric wheel is fixedly mounted on the transmission main shaft, and the lower end of the eccentric sleeve connecting rod is sleeved on the eccentric wheel. The upper left end of the eccentric sleeve connecting rod is rotatably connected to the right end of the rocker arm, and the left end of the rocker arm is rotatably mounted on the warp knitting machine frame. The lower end of the main shaft connecting rod is rotatably connected to the upper right end of the eccentric sleeve connecting rod, and the upper end of the main shaft connecting rod is rotatably connected to the right end of the groove needle swing arm. The left end of the groove needle swing arm is fixedly mounted on the groove needle loop forming main shaft.

[0007] As a preferred embodiment of the present invention, the right end of the compensation swing arm is rotatably connected to the lower end of the connecting rod through a first pin shaft, and the upper end of the main shaft connecting rod is rotatably connected to the right end of the groove needle swing arm through a second pin shaft, and the distance between the first pin shaft and the groove needle circle forming main shaft is greater than or less than or equal to the distance between the second pin shaft and the groove needle circle forming main shaft.

[0008] After adopting the above structure, the present invention has the following beneficial effects:

[0009] Conventional warp knitting machines are equipped with a groove needle transmission mechanism, a needle core transmission mechanism, and a sinker transmission mechanism between the transmission main shaft and the groove needle looping main shaft, the needle core looping main shaft, and the sinker looping main shaft, respectively, to drive the groove needles, needle cores, and sinkers to achieve knitting. The present invention utilizes the existing groove needle looping main shaft and groove needle transmission mechanism of the warp knitting machine, and only provides a compensating swing arm on the groove needle looping main shaft. The swing of the groove needle looping main shaft during knitting simultaneously drives the compensating swing arm to swing synchronously, thereby driving the connecting rod, compensation connecting rod, tension rod, and tension plate to achieve yarn tension compensation. The present invention has a simple structure, is easy to assemble, and is convenient for maintenance and commissioning.

[0010] The present invention abandons the prior art of setting up a dedicated transmission mechanism on the transmission main shaft, such as a synchronous wheel and synchronous belt transmission mechanism, specifically for yarn tension compensation. Instead, it uses the existing groove needle transmission mechanism. The present invention greatly simplifies the cumbersome structure of the prior art, making assembly convenient and concise, and maintenance and debugging are also simpler, further improving the production efficiency of the warp knitting machine.

[0011] The present invention fixes the compensation swing arm on the groove needle loop forming spindle instead of on the needle core or the sinker loop forming spindle. It directly utilizes the swing angle position of the groove needle loop forming spindle and the groove needle motion trajectory to synchronously achieve the same yarn tension compensation force. The yarn tension compensation is not only more accurate, but also more stable and reliable.

[0012] The groove needle transmission mechanism of the present invention adopts an eccentric wheel transmission mechanism, which includes an eccentric wheel, an eccentric sleeve connecting rod, a rocker, a main shaft connecting rod and a groove needle swing arm. The eccentric wheel transmission mechanism can better ensure the accuracy of yarn tension compensation.

[0013] For yarns of different properties, the present invention adjusts the tension required for yarns of different properties by adjusting the distance between the first pin and the groove needle loop forming axis to be greater than, less than, or equal to the distance between the second pin and the groove needle loop forming axis, so that yarns of different properties can obtain corresponding and accurate tension compensation.

[0014] The invention has a simple structure and is easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0016] Figure 1 The figure is a structural schematic diagram of the active yarn tension compensation device of the warp knitting machine of the present invention.

[0017] Figure 2 The figure is a side view schematic diagram of the active yarn tension compensation device of the warp knitting machine of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the groove needle transmission mechanism in the present invention. Implementation Method

[0019] See also Figure 1 、 23 shows an active yarn tension compensation device for a warp knitting machine, the warp knitting machine comprising a transmission spindle 1 and a loop forming spindle 2, the transmission spindle 1 being rotatably mounted in the oil tank of the warp knitting machine, the loop forming spindle 2 comprising a groove needle loop forming spindle 2-1, a needle core loop forming spindle 2-2, a sinking loop forming spindle, etc., the sinking loop forming spindle not being shown in the figure, the groove needle loop forming spindle 2-1 and the needle core loop forming spindle 2-2 being rotatably mounted on the warp knitting machine frame, the active yarn tension compensation device for a warp knitting machine comprising a connecting rod 3, a compensation connecting rod 4, a tension rod 5 and a tension plate 6, the upper end 3-3 of the connecting rod 3 1 is rotatably connected to the left end 4-1 of the compensation link 4 through a pin 16 and a bearing, and the right end 4-2 of the compensation link 4 is fixedly connected to the tension rod 5 through a half and a bolt. The tension rod 5 is rotatably mounted on the warp knitting machine frame, and the tension plate 6 is fixedly mounted on the tension rod 5. The active yarn tension compensation device for the warp knitting machine also includes a compensation swing arm 7. The left end 7-1 of the compensation swing arm 7 is fixedly mounted on the groove needle stitch spindle 2-1 through a half and a bolt, and the right end 7-2 of the compensation swing arm 7 is rotatably connected to the lower end 3-2 of the connecting rod 3.

[0020] As a preferred embodiment of the present invention, Figure 3 As shown, the transmission main shaft 1 drives the groove needle loop forming main shaft 2-1 to swing through the groove needle transmission mechanism. The groove needle transmission mechanism includes an eccentric wheel 8, an eccentric sleeve connecting rod 9, a rocker 10, a main shaft connecting rod 11 and a groove needle swing arm 12. The eccentric wheel 8 is fixedly mounted on the transmission main shaft 1 through a half or a tightening sleeve. When working, the transmission main shaft 1 is driven to rotate by the main motor of the warp knitting machine. When the transmission main shaft 1 rotates, the eccentric wheel 8 is driven to rotate at the same time. The lower end 9-1 of the eccentric sleeve connecting rod 9 is sleeved on the eccentric wheel 8. The present invention preferably has the lower end 9-1 of the eccentric sleeve connecting rod 9 passed through The bearing 15 is mounted on the eccentric wheel 1; the upper left end 9-2 of the eccentric sleeve connecting rod 9 is rotatably connected to the right end of the rocking arm 10 via a pin and a bearing. The left end of the rocking arm 10 is rotatably mounted on the warp knitting machine frame via a pin and a bearing. The lower end of the main shaft connecting rod 11 is rotatably connected to the upper right end 9-3 of the eccentric sleeve connecting rod 9 via a pin and a bearing. The upper end of the main shaft connecting rod 11 is rotatably connected to the right end 12-1 of the groove needle swing arm 12. The left end 12-2 of the groove needle swing arm 12 is fixedly mounted on the groove needle stitching spindle 2-1 via a half and bolts. During operation, the transmission spindle 1 drives the groove needle stitching spindle 2-1 to swing back and forth through the groove needle transmission mechanism. In the present invention, in addition to the above-mentioned eccentric wheel mechanism, the groove needle transmission mechanism may also adopt other transmission mechanisms, such as a cam mechanism, a connecting rod mechanism, etc.

[0021] As a preferred embodiment of the present invention, Figure 1 、 3As shown, the right end 7-2 of the compensation swing arm 7 is rotatably connected to the lower end 3-2 of the connecting rod 3 via a first pin 13 and a bearing. The upper end of the spindle connecting rod 11 is rotatably connected to the right end 12-1 of the groove needle swing arm 12 via a second pin 14 and a bearing. The distance between the first pin 13 and the groove needle stitch spindle 2-1 is greater than, less than, or equal to the distance between the second pin 14 and the groove needle stitch spindle 2-1. By adjusting the distance between the first pin 13 and the groove needle stitch spindle 2-1, the required tension of yarns of different properties can be adjusted, so that different yarn properties can receive corresponding and accurate tension compensation.

[0022] When the present invention is working, the transmission main shaft 1 drives the groove needle loop forming main shaft 2-1 to swing through the groove needle transmission mechanism. With the help of the swing of the groove needle loop forming main shaft 2-1, the compensation swing arm 7 is driven to swing synchronously, thereby driving the connecting rod 3 to move up and down, and the compensation connecting rod 4 to swing up and down, and then the tension rod 5 is swung, and finally the tension plate 6 fixedly installed on the tension rod 5 swings up and down accordingly. This cycle is repeated to compensate the yarn tension in time.

[0023] After trial, the present invention has a simple structure and is easy to assemble. It utilizes the swing angle position of the groove needle loop forming spindle and the groove needle movement trajectory to achieve accurate and stable yarn tension compensation, thereby improving production efficiency and achieving good results.

Claims

1. A warp knitting machine active yarn tension compensation device, the warp knitting machine comprises a transmission main shaft (1) and a loop forming main shaft (2), the transmission main shaft (1) is rotatably mounted in the warp knitting machine oil tank, the loop forming main shaft (2) comprises a groove needle loop forming main shaft (2-1) and a needle core loop forming main shaft (2-2), the groove needle loop forming main shaft (2-1) and the needle core loop forming main shaft (2-2) are rotatably mounted on the warp knitting machine frame, the warp knitting machine active yarn tension compensation device comprises a connecting rod (3), a compensation connecting rod (4), a tension rod (5) and a tension plate (6), the upper end (3-1) of the connecting rod (3) is rotatably connected to the left end (4-1) of the compensation connecting rod (4), the right end (4-2) of the compensation connecting rod (4) is fixedly connected to the tension rod (5), the tension rod (5) is rotatably mounted on the warp knitting machine frame, and the tension plate (6) is fixedly mounted on the tension rod (5), characterized in that: The active yarn tension compensation device of the warp knitting machine further comprises a compensation swing arm (7), the left end (7-1) of the compensation swing arm (7) being fixedly mounted on the groove needle loop forming spindle (2-1), and the right end (7-2) of the compensation swing arm (7) being rotationally connected to the lower end (3-2) of the connecting rod (3).

2. The active yarn tension compensation device for a warp knitting machine according to claim 1, characterized in that: The transmission main shaft (1) drives the groove needle loop forming main shaft (2-1) to swing through the groove needle transmission mechanism. The groove needle transmission mechanism includes an eccentric wheel (8), an eccentric sleeve connecting rod (9), a rocker (10), a main shaft connecting rod (11) and a groove needle swing arm (12). The eccentric wheel (8) is fixedly mounted on the transmission main shaft (1). The lower end (9-1) of the eccentric sleeve connecting rod (9) is sleeved on the eccentric wheel (8). The upper left end (9-1) of the eccentric sleeve connecting rod (9) is sleeved on the eccentric wheel (8). -2) is rotatably connected to the right end of the rocking arm (10), the left end of the rocking arm (10) is rotatably mounted on the warp knitting machine frame, the lower end of the main shaft connecting rod (11) is rotatably connected to the right upper end (9-3) of the eccentric sleeve connecting rod (9), the upper end of the main shaft connecting rod (11) is rotatably connected to the right end (12-1) of the groove needle swing arm (12), and the left end (12-2) of the groove needle swing arm (12) is fixedly mounted on the groove needle loop forming main shaft (2-1).

3. The active yarn tension compensation device for a warp knitting machine according to claim 2, characterized in that: The right end (7-2) of the compensation swing arm (7) is rotatably connected to the lower end (3-2) of the connecting rod (3) via a first pin shaft (13), and the upper end of the main shaft connecting rod (11) is rotatably connected to the right end (12-1) of the groove needle swing arm (12) via a second pin shaft (14). The distance between the first pin shaft (13) and the groove needle loop forming spindle (2-1) is greater than, less than, or equal to the distance between the second pin shaft (14) and the groove needle loop forming spindle (2-1).

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