Torsional vibration eliminating device for rear roller of ring spinning frame

Abstract

The invention belongs to the technical field of spinning frames, and particularly relates to a torsional vibration eliminating device for a rear roller of a ring spinning frame, which comprises two groups of segmented drafting transmission components and a rear roller transmission gear changing component, the segmented drafting transmission components are arranged on a rack in a central symmetry structure, and each segmented drafting transmission component comprises a V-shaped mounting plate; the speed reduction box and the speed reduction motor are arranged on the two sides of the V-shaped mounting plate respectively; the rear roller transmission gear changing assembly comprises two sets of symmetrically-arranged transmission units, and each set of transmission unit comprises an input gear, a first transmission gear and a variable gear. Through the cooperation between the segmented drafting transmission assembly and the rear roller transmission gear changing assembly, on the basis that segmented drafting transmission is conducted on the rear rollers through a simplified structure and the distance between the middle rollers and the rear rollers is adjusted, the draft multiple between the rear rollers and the middle rollers is adjusted through the rear roller transmission gear changing assembly; and the yield of the spinning frame and the yarn quality are improved on the whole.

Description

Technical Field

[0001] The present invention belongs to the technical field of ring spinning frames, and particularly relates to a torsional vibration elimination device for a back roller of a ring spinning frame. Background Art

[0002] The torsional vibration phenomenon of the roller is a common running error of existing ring spinning frames, especially obvious in extra-long ring spinning frames. This is because a relatively large roller length-diameter ratio will cause a lag phenomenon of the torque transmitted by the drafting drive device at the head and tail of the ring spinning frame at the end of each roller. At this time, due to the characteristics of the iron roller material, the end of each roller will suddenly release torque within a certain period of time when the lag phenomenon occurs, which is a periodic torsional vibration phenomenon; in a specific ring spinning frame, when the speed of the middle roller is constant, when torsional vibration occurs at the end of the back roller, the feeding amount of the back roller to the middle roller will be periodically uneven, resulting in an increase in thick and thin places of the finished yarn and affecting the yarn evenness.

[0003] In order to weaken the torsional vibration phenomenon of the back roller, in the prior art, the back roller in the overall extra-long ring spinning frame is designed in a three-section form. The head drafting drive device provides torque for the first-section back roller, a transition box body is added between the first-section back roller and the second-section back roller to provide torque for the second-section back roller, and the tail drafting drive device provides torque for the third-section back roller. Such a design makes the length of each section of the back roller shorter than before, weakening the torsional vibration phenomenon of the back roller.

[0004] However, although the above prior art reduces the occurrence of torsional vibration of the back roller during the operation of the ring spinning frame, the transition box body has a relatively complex internal structure, high design and production costs, and a large volume of the body, which will occupy the original spindle space of the ring spinning frame, resulting in a reduction in the number of spindles of the ring spinning frame, thereby reducing the output of the ring spinning frame; and the setting of the transition box body can only reduce part of the torsional vibration phenomenon and cannot eliminate the torsional vibration phenomenon as much as possible. Therefore, how to design a torsional vibration elimination device for the back roller to reduce investment and output loss in terms of cost and shape, and also to eliminate the torsional vibration phenomenon of the back roller as much as possible is an urgent problem to be solved in the existing textile machinery field. Summary of the Invention

[0005] In view of this, the present invention provides a torsional vibration elimination device for a back roller of a ring spinning frame. Through the cooperation between a segmented drafting drive assembly and a back roller drive change gear assembly, on the basis of using a streamlined structure to perform segmented drafting drive on the back roller and adjusting the distance between the middle roller and the back roller, the back roller drive change gear assembly is used to adjust the drafting ratio between the back roller and the middle roller, generally improving the output of the ring spinning frame and the quality of the yarn.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A torsional vibration elimination device for the back roller of a ring spinning frame is provided on the frame of the spinning frame. The frame is composed of several supporting wallboards, mounting brackets symmetrically arranged above the supporting wallboards, and an air duct located between the two mounting brackets. Above each mounting bracket, a set of spinning working parts is provided, and the two sets of spinning working parts are symmetrically arranged. Each set of spinning working parts includes a front roller, a middle roller, and a back roller arranged in sequence. On this basis, the spinning frame further includes a headstock drafting drive device and a tailstock drafting drive device. The torsional vibration elimination device includes a segmented drafting drive assembly and a back roller drive change gear assembly, where:

[0008] There are two sets of segmented drafting drive assemblies, which are arranged on the frame in a centrosymmetric structure. The segmented drafting drive assembly includes:

[0009] A "V"-shaped mounting plate, which is the installation foundation of the entire segmented drafting drive assembly. The "V"-shaped mounting plate is inverted above the air duct and fits the cross-section of the air duct. A relief hole is provided on the "V"-shaped mounting plate, and several elongated adjustment holes are provided around the relief hole. The adjustment direction of each adjustment hole is the same and is at an angle of 45° to the horizontal plane;

[0010] A reduction gearbox, which is cooperatively arranged on one side of the "V"-shaped mounting plate through a mounting component. A reduction component is provided inside the reduction gearbox. The reduction component is composed of five sets of double-row gear components that are sequentially meshed. In addition, the input end of the reduction gearbox is connected to a reduction motor, and the reduction motor is placed on the other side of the "V"-shaped mounting plate through the relief function of the relief hole; the output end of the reduction gearbox is connected to a bidirectional connecting shaft, and both ends of the bidirectional connecting shaft are connected to a roller output connecting shaft through a first coupling. Each roller output connecting shaft is threadedly connected to a back roller. On this basis, the reduction ratio of the reduction gearbox is 50:1, and the reduction gearbox amplifies the torque output by the reduction motor by 1:50;

[0011] On this basis, the back roller includes four, namely the first back roller, the second back roller, the third back roller, and the fourth back roller. Among them, the first back roller is connected to the headstock drafting drive device, the fourth back roller is connected to the tailstock drafting drive device, and the second back roller and the third back roller are respectively cooperatively arranged at both ends of the bidirectional connecting shaft through a second coupling and a roller output connecting shaft;

[0012] The back roller drive change gear assembly is provided in the headstock drafting drive device and the tailstock drafting drive device. The back roller drive change gear assembly includes:

[0013] Two sets of symmetrically arranged transmission units, and both sets of transmission units are installed on the installation wall panel. Among them, each set of transmission units includes an input gear, the input gear is connected with a first transmission gear through a first transmission shaft, the first transmission gear is meshed with a second transmission gear, the second transmission gear is meshed with a variable gear, and the variable gear is connected with the first back roller and the fourth back roller through a disassembly and replacement component, where:

[0014] The disassembly and replacement component includes a second transmission shaft key-connected with the variable gear. The second transmission shaft is connected with the ends of the first back roller and the fourth back roller through a third coupling. In addition, a bearing is connected to the outer wall of the second transmission shaft, and a fixing component is arranged on the outer wall of the bearing. The fixing component includes a support frame fixedly connected with the installation frame. A lower bearing seat is arranged on the support frame, and an upper bearing seat is connected above the lower bearing seat through bolts. The lower bearing seat and the upper bearing seat are buckled with each other and arranged outside the bearing.

[0015] Preferably, in the sectional drafting transmission component, first mounting plates and second mounting plates are respectively arranged at the two bottom feet of the "V"-shaped mounting plate. By respectively bolt-connecting the first mounting plate and the second mounting plate with the two mounting frames, the "V"-shaped mounting plate is mounted on the machine frame.

[0016] Preferably, a rib plate is arranged between the "V"-shaped mounting plate and the first mounting plate and the second mounting plate, and the rib plate is located on one side of the "V"-shaped mounting plate.

[0017] Preferably, on the "V"-shaped mounting plate, a proximity switch mounting frame is further arranged on the side close to the reduction motor. A proximity switch element is arranged on the proximity switch mounting frame for detecting the rotation speed of the roller output connecting shaft; in addition, the reduction motor adopts a servo motor.

[0018] Preferably, in the sectional drafting transmission component, the mounting component includes a first positioning plate rotatably arranged on the output shaft of the reduction motor through a bearing. A plurality of adjusting bolts are arranged on the first positioning plate, and the adjusting bolts correspond to the adjusting holes in number and position one by one.

[0019] Preferably, the mounting component further includes a second positioning plate rotatably arranged on the input shaft of the reduction box through a bearing. A plurality of connecting nuts are arranged on the second positioning plate, and the connecting nuts correspond to the adjusting bolts in number one by one. On the basis that a plurality of adjusting bolts are respectively matched with the adjusting holes, the reduction motor and the reduction box are fixed on the "V"-shaped mounting plate through the cooperation of the ends of the adjusting bolts and the connecting nuts.

[0020] Preferably, in the rear roller drive change gear assembly, the first transmission shaft in any set of transmission units is further connected to a main motor, and the main motor provides power for the input gear.

[0021] Preferably, the rear roller drive change gear assembly further includes an adjustment assembly. The adjustment assembly includes an adjustment arm. One end of the adjustment arm is rotatably arranged on the installation wall panel, and the other end forms a limiting structure with the installation wall panel through a limiting component. In addition, the adjustment assembly further includes a rotating shaft. One end of the rotating shaft is fixedly arranged in the middle of the adjustment arm, and the other end of the rotating shaft is rotatably connected to the second transmission gear.

[0022] Preferably, in the adjustment assembly, the limiting component includes a set of limiting bolts arranged on the adjustment arm and an arc-shaped groove arranged on the installation wall panel. One end of the limiting bolt is a limiting end, and the other end is a threaded end. The diameter of the limiting end is greater than the width of the arc-shaped groove. And after the threaded end sequentially penetrates through the arc-shaped groove and the adjustment arm, it is connected to a limiting nut. The position of the limiting bolt in the arc-shaped groove and the position of the second transmission gear are limited by the tightening degree of the limiting nut and the limiting bolt.

[0023] Preferably, a handle is arranged on the side of the adjustment arm away from the installation wall panel.

[0024] The beneficial effects of the present invention are as follows:

[0025] Generally speaking, the torsional vibration elimination device provided by the present invention is applied to the rear roller of a spinning frame. Through the cooperation between the segmented drafting transmission assembly and the rear roller drive change gear assembly, on the basis of using a streamlined structure to perform segmented drafting transmission on the rear roller and adjust the distance between the middle roller and the rear roller, the rear roller drive change gear assembly is used to adjust the drafting multiple between the rear roller and the middle roller. Generally, the output of the spinning frame and the quality of the yarn are improved.

[0026] Specifically, on the basis of using a reduction motor to provide the initial torque, the segmented drafting drive assembly uses a special reduction gearbox to amplify the initial torque by 1:50. On the premise that the overall long frame of the spinning frame can work normally, the back roller is set in four sections. The head drafting drive device provides torque for the first back roller, the tail drafting drive device provides torque for the fourth back roller, and the segmented drafting drive assembly provides torque for the second back roller and the third back roller bidirectionally at the same time. Such a setting shortens the length of each section of the back roller and also takes into account the adjustment of the distance between the middle roller and each back roller, thereby weakening the torsional vibration phenomenon of each section of the back roller and improving the quality of the finished spun yarn. In addition, the present invention also fits and installs the reduction motor and the reduction gearbox on the frame of the spinning frame through a "V"-shaped mounting plate, streamlining the overall volume of the segmented drafting drive assembly, so that the spindle space occupied by the assembly on the spinning frame is reduced, and the reduction of the lost output is achieved compared with the structure of the existing spinning frame, which reflects the advantage of the device in improving the output of the spinning frame from the side.

[0027] On this basis, under the premise that the back roller drive change gear assembly moves the position of the second drive gear by using the adjusting arm, the variable gear and the second transmission shaft are split from the first back roller and / or the fourth back roller through the third coupling, and on this basis, the variable gears with different numbers of teeth are replaced to change the rotational speed of the first back roller and the fourth back roller, thereby changing the drafting multiple in the back zone of the spinning frame, further reducing the torsional vibration phenomenon of the back roller, and finally making the torsional vibration phenomenon of the entire length of the back roller eliminated as much as possible. Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 Schematic diagram of the connection state between the drafting drive structure in the prior art and the back roller;

[0030] Figure 2 Schematic diagram of the connection state between the segmented drafting drive assembly provided by the technical solution of the present invention and the back roller;

[0031] Figure 3 Schematic diagram of the specific structure of the segmented drafting drive assembly provided in the present invention on the frame;

[0032] Figure 4 Schematic diagram of the specific structure of the segmented drafting drive assembly in the present invention;

[0033] Figure 5 Explosion schematic diagram of the specific structure of the segmented drafting drive assembly in the present invention;

[0034] Figure 6 Schematic diagram of the specific structure of the rear roller drive change gear assembly in the present invention;

[0035] Figure 7 Schematic diagram of the specific structure of the rear roller drive change gear assembly from another angle in the present invention. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] In the prior art, the rear roller 1 in the overall long frame of the spinning frame is designed in a three-segment form, as Figure 1 shown. Specifically, the headstock drafting drive device 4 provides torque for the first rear roller 101. A transition box body 2 is added between the first rear roller 101 and the second rear roller 102 to provide torque for the second rear roller 102, and the tailstock drafting drive device 3 provides torque for the third rear roller 103, so that the length of each section of the rear roller is shorter than before, thereby weakening the torsional vibration phenomenon of each section of the rear roller.

[0039] However, although the above method can weaken the torsional vibration phenomenon of a part of the back roller, the use of the transition box body 2 occupies the original spindle space of the ring spinning frame, resulting in a reduction in the number of spindles of the ring spinning frame, and thus reducing the output of the ring spinning frame; in fact, the elimination of the torsional vibration phenomenon of the back roller requires the combined use of two methods: one is to reduce the length-diameter ratio of the back roller and at the same time increase the distance between the middle roller and the back roller; the other is to reduce the draft multiple in the back zone, where the back zone refers to the area between the middle roller and the back roller.

[0040] In view of this, the present technical solution provides a torsional vibration elimination device for the back roller of a ring spinning frame. Through the cooperation between the segmented draft transmission assembly 5 and the back roller transmission change gear assembly 6, on the basis of using a streamlined structure to perform segmented draft transmission on the back roller and adjusting the distance between the middle roller and the back roller, the back roller transmission change gear assembly 6 is used to adjust the draft multiple between the back roller and the middle roller, generally improving the output of the ring spinning frame and the quality of the yarn.

[0041] In the present technical solution, as Figure 3 shown, a torsional vibration elimination device for the back roller of a ring spinning frame is provided on the frame 7 of the ring spinning frame. The frame 7 is composed of several support wallboards 701, mounting frames 702 symmetrically arranged above the support wallboards 701, and an air duct 703 located between the two mounting frames 702. Above each mounting frame 702, a set of ring spinning working parts is provided, and the two sets of ring spinning working parts are symmetrically arranged. Each set of ring spinning working parts includes a front roller 8, a middle roller 9, and a back roller 1 arranged in sequence. On this basis, the ring spinning frame further includes a headstock draft transmission device 4 and a tailstock draft transmission device 3.

[0042] It should be understood that the ring spinning working parts of the ring spinning frame realize the ring spinning work through the mutually cooperating front roller 8, middle roller 9, and back roller 1. In the overall long frame of the ring spinning frame, the lengths of the front roller 8, middle roller 9, and back roller 1 can reach 20 m. During the draft transmission process, torsional vibration phenomena of the rollers will occur, so it is necessary to perform segmented draft transmission on them. In this application, mainly a new technical solution is used to weaken the torsional vibration phenomena generated during the working process of the back roller 1, and at the same time, the influence of the overall volume of the provided device on the original number of spindles of the ring spinning frame, that is, the original output, is also taken into account; the actual working forms of the front roller 8 and the middle roller 9 are not elaborated in detail here.

[0043] Therefore, the ultimate core of this application lies in: by using the cooperation between the segmented drafting drive assembly 5 and the back roller drive change gear assembly 6, the output of the spinning frame and the quality of the yarn are generally improved; and the back roller 1 described in this application includes four, namely the first back roller 101, the second back roller 102, the third back roller 103 and the fourth back roller 104. Among them, the first back roller 101 is connected to the headstock drafting drive device 4, and the fourth back roller 104 is connected to the tailstock drafting drive device 3. The specific structure is as Figure 2 shown.

[0044] As an innovation point of the present invention, as Figure 3 shown, there are two groups of segmented drafting drive assemblies 5, and they are arranged on the frame 7 in a centrosymmetric structure. The segmented drafting drive assembly 5 includes:

[0045] a "V"-shaped mounting plate 501. As Figures 4 - 5 shown, the "V"-shaped mounting plate 501 is the mounting foundation of the entire segmented drafting drive assembly 5. The "V"-shaped mounting plate 501 is inverted above the air duct 703 and fits the cross-section of the air duct 703. At the two bottom feet of the "V"-shaped mounting plate 501, a first mounting plate 502 and a second mounting plate 503 are respectively provided. By bolt-connecting the first mounting plate 502 and the second mounting plate 503 to two mounting brackets 702 respectively, the "V"-shaped mounting plate 501 is mounted on the frame 7. In addition, rib plates 504 are provided between the "V"-shaped mounting plate 501 and the first mounting plate 502 and the second mounting plate 503, and the rib plates 504 are located on one side of the "V"-shaped mounting plate 501.

[0046] Based on the above embodiments, the "V"-shaped mounting plate 501 is fitted and mounted above the air duct 703 in cooperation with the first mounting plate 502 and the second mounting plate 503, and then the stability is enhanced by the rib plates 504, making the "V"-shaped mounting plate 501 the mounting foundation of the entire segmented drafting drive assembly 5.

[0047] In addition, as Figures 4 - 5 shown, a relief hole 505 is provided on the "V"-shaped mounting plate 501. A number of strip-shaped adjustment holes 506 are provided around the relief hole 505. The adjustment directions of each adjustment hole 506 are the same and are all at 45° to the horizontal plane.

[0048] In this technical solution, as Figures 4 - 5 shown, the segmented drafting drive assembly 5 further includes a reduction gearbox 507. The reduction gearbox 507 is cooperatively arranged on one side of the "V"-shaped mounting plate 501 through a mounting component. A reduction component is provided inside the reduction gearbox 507, and the reduction component is composed of five groups of sequentially meshing double-row gear assemblies. In addition, a reduction motor 508 is connected to the input end of the reduction gearbox 507, and the reduction motor 508 is placed on the other side of the "V"-shaped mounting plate 501 through the relief function of the relief hole 505.

[0049] Specifically, as Figure 5 shown, the mounting assembly includes a first positioning plate 509 rotatably arranged on the output shaft of the reduction motor 508 through a bearing. A plurality of adjusting bolts 510 are provided on the first positioning plate 509, and the adjusting bolts 510 correspond to the adjusting holes 506 one by one in terms of quantity and position. In addition, the mounting assembly further includes a second positioning plate 511 rotatably arranged on the input shaft of the reduction gearbox 507 through a bearing. A plurality of connecting nuts 512 are provided on the second positioning plate 511, and the connecting nuts 512 correspond to the adjusting bolts 510 one by one in terms of quantity.

[0050] Based on the above embodiments, on the basis that a plurality of adjusting bolts 510 are respectively matched with the adjusting holes 506, through the cooperation between the end of the adjusting bolt 510 and the connecting nut 512, the reduction motor 508 and the reduction gearbox 507 are fixed on the "V"-shaped mounting plate 501. The settings of the first positioning plate 509 and the second positioning plate 511 increase the stability of the fixation of the reduction motor 508 and the reduction gearbox 507, and facilitate the adjustment of the position of the reduction gearbox through the cooperation of the adjusting bolts 510, the connecting nuts 512, and the adjusting holes 506.

[0051] Based on the above structure, as Figures 4 - 5 shown, a two-way connecting shaft 513 is connected to the output end of the reduction gearbox 507. Both ends of the two-way connecting shaft 513 are connected with roller output connecting shafts 515 through first couplings 514. Two roller output connecting shafts 515 are respectively threadedly connected with a second back roller 102 and a second back roller 103. On this basis, the reduction ratio of the reduction gearbox 507 is 50:1, and the reduction gearbox 507 amplifies the torque output by the reduction motor 508 by 1:50.

[0052] So far, on the basis that the head draft transmission device 4 provides torque for the first back roller 101 and the tail draft transmission device 3 provides torque for the fourth middle roller 104 in the present invention, the reduction gearbox 507 simultaneously outputs and transmits torque to the second back roller 102 and the third back roller 103, so that the length of each back roller is shortened, the slenderness ratio is reduced, and the position of the back roller is adjusted by using the cooperation of a plurality of adjusting bolts 510, connecting nuts 512, and adjusting holes 506, and the distance between the back roller and the middle roller is adjusted. Generally, the torsional vibration phenomenon of each back roller is weakened, and the quality of the finished spun yarn is initially improved.

[0053] In this application, the above embodiments consider the influence of the slenderness ratio of the back roller and the distance between the back roller and the middle roller on the torsional vibration phenomenon of the back roller. However, the measures for reducing the torsional vibration phenomenon of the back roller also include reducing the draft multiple in the back zone. The specific structure for supporting the reduction of the draft multiple in the back zone will be described in detail below.

[0054] As shown Figures 6 - 7 in the figure, the back roller drive change gear assembly 6 is provided in the headstock drafting drive device 4 and the tailstock drafting drive device 3. The back roller drive change gear assembly 6 includes:

[0055] Two groups of symmetrically arranged drive units, and both groups of drive units are installed on the mounting wall panel 601. Among them, each group of drive units includes an input gear 602. The input gear 602 is connected to a first drive gear 604 through a first transmission shaft 603. The first drive gear 604 is meshed and connected to a second drive gear 605. The second drive gear 605 is meshed and connected to a variable gear 606. The variable gear 606 is connected to the first back roller 101 and the fourth back roller 104 through a disassembly and replacement assembly.

[0056] Specifically, the disassembly and replacement assembly includes a second transmission shaft 607 key-connected to the variable gear 606. The second transmission shaft 607 is connected to the end of the first back roller 101 or the fourth back roller 104 through a third coupling. Figure 7 Taking the connection with the first back roller 101 as an example, in addition, a bearing is connected to the outer wall of the second transmission shaft 607, and a fixing assembly is provided on the outer wall of the bearing. The fixing assembly includes a support frame 608 fixedly connected to the mounting frame 702. A lower bearing seat 609 is provided on the support frame 608. An upper bearing seat 610 is connected above the lower bearing seat 609 by bolts. The lower bearing seat 609 and the upper bearing seat 610 are buckled with each other and arranged outside the bearing.

[0057] Based on the above embodiments, the variable gear 606 is a number of helical gears with different numbers of teeth, and the difference in the number of teeth of the gears is directly reflected in the diameter of the gears. That is, when the same linear speed is provided for the variable gear 606, the more teeth the variable gear 606 has, the smaller the angular velocity of the variable gear 606. Thus, without changing the main power transmission, the rotational speed of the first back roller 101 or the fourth back roller 104 can be reduced, that is, the draft ratio in the back zone is reduced, thereby reducing the torsional vibration phenomenon of the first back roller 101 and the fourth back roller 104. Specifically, when the variable gear 606 needs to be replaced, first disassemble and separate the lower bearing seat 609 and the upper bearing seat 610, then use the third coupling to separate the second transmission shaft 607 from the first back roller 101 or the fourth back roller 104, and then remove the variable gear 606 on the second transmission shaft 607 for replacement.

[0058] Correspondingly, since the deceleration motor 508 in the segmented drafting drive assembly 5 is a servo motor, the rotational speeds of the second back roller 102 and the third back roller 103 can be controlled by the servo motor to match those of the first back roller 101 and the fourth back roller 104. Moreover, in the present application, on the "V"-shaped mounting plate 501, a proximity switch mounting bracket 516 is further provided on the side close to the deceleration motor 508, and a proximity switch element is provided on the proximity switch mounting bracket 516 for detecting the rotational speed of the roller output connecting shaft 515. On this basis, when using the segmented drafting drive assembly 5 to adjust the gauge between the second back roller 102, the third back roller 103 and the middle roller, the back roller drive change gear assembly 6 can also adjust the positions of the first back roller 101 and the fourth back roller 104 to match those of the second back roller 102 and the third back roller 103 through the connection position between the support frame 608 and the lower bearing block 609, ultimately minimizing the torsional vibration phenomenon along the entire length of the back roller 1 as much as possible.

[0059] In addition, as Figures 6 - 7 shown, in the back roller drive change gear assembly 6, the first transmission shaft 603 in any one set of drive units is connected to a main motor, and the main motor provides power for the input gear 602. It should be noted that during operation, the main motor not only provides rotational power for the back roller 1, but also provides power for the front roller and the middle roller through other transmission mechanisms. To change the draft multiple in the back zone, only the rotational speed of the back roller 1 needs to be changed, without changing the rotational speeds of the front roller and the middle roller. This is the fundamental reason for changing the teeth of the variable gear 606 using the above structure. The main motor is not shown in the figure.

[0060] On the basis of minimizing the torsional vibration phenomenon along the entire length of the back roller 1 through the above embodiments, the present application also makes an adaptive setting for the process of the main motor providing power transmission to the first back roller 101 and the fourth back roller 104 after changing the gears. Specifically, as Figures 6 - 7 shown, the back roller drive change gear assembly 6 further includes an adjustment assembly. The adjustment assembly includes an adjustment arm 611. One end of the adjustment arm 611 is rotatably provided on the mounting wall panel 601, and the other end forms a limiting structure with the mounting wall panel 601 through a limiting assembly. In addition, the adjustment assembly further includes a rotating shaft 612. One end of the rotating shaft 612 is fixedly provided in the middle of the adjustment arm 611, and the other end of the rotating shaft 612 is rotatably connected to the second transmission gear 605.

[0061] Specifically, the limiting component includes a set of limiting bolts 613 provided on the adjusting arm 611 and an arc-shaped groove 614 provided on the mounting wall panel 601. One end of the limiting bolt 613 is the limiting end and the other end is the threaded end. The diameter of the limiting end is greater than the width of the arc-shaped groove 614. After the threaded end sequentially penetrates through the arc-shaped groove 614 and the adjusting arm 611, it is connected to a limiting nut 615. The position of the limiting bolt 613 in the arc-shaped groove 614 is limited by the tightening degree of the limiting nut 615 with respect to the limiting bolt 613, and at the same time, the position of the second transmission gear 605 is limited.

[0062] Based on the above embodiments, when the variable gear 606 needs to be replaced, before performing the replacement operation on the variable gear 606, first lift the adjusting arm 611 to lift the second transmission gear 605 so that it is not engaged with the variable gear 606. Then perform the replacement operation on the variable gear 606. Then lower the adjusting arm 611 so that the second transmission gear is engaged with the variable gear 606. Then tighten the limiting nut 615 to limit the position of the second transmission gear 605. In addition, in order to facilitate the staff to lift the adjusting arm 611, a handle 616 is provided on the side of the adjusting arm 611 away from the mounting wall panel 601 in this application.

[0063] Specifically, on the basis of using the reduction motor 508 to provide the initial torque, the segmented drafting transmission assembly 5 uses a special reduction gearbox 507 to amplify the initial torque by 1:50. On the premise that the overall long frame of the spinning frame can operate normally, the back roller 1 is set in four segments. The head drafting transmission device 4 provides torque for the first back roller 101, the tail drafting transmission device 3 provides torque for the fourth back roller 104, and the segmented drafting transmission assembly 5 provides torque for the second back roller 102 and the third back roller 103 bidirectionally at the same time. Such a setting shortens the length of each segment of the back roller and also takes into account the adjustment of the distance between the middle roller and each back roller, thereby weakening the torsional vibration phenomenon of each segment of the back roller and improving the quality of the finished spun yarn.

[0064] On this basis, on the premise that the back roller transmission change gear assembly 6 moves the position of the second transmission gear 605 by using the adjusting arm 611, the variable gear 606 and the second transmission shaft 607 are split from the first back roller 101 and / or the fourth back roller 104 through the third coupling, and on this basis, the variable gear 606 with different tooth numbers is replaced to change the rotational speeds of the first back roller 101 and the fourth back roller 104, thereby changing the drafting multiple in the back zone of the spinning frame, further reducing the torsional vibration phenomenon of the back roller, and finally making the torsional vibration phenomenon of the entire length of the back roller 1 eliminated as much as possible.

[0065] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A torsional vibration elimination device for the back roller of a ring spinning frame, which is arranged on the frame of the spinning frame. The frame is composed of several supporting wallboards, mounting brackets symmetrically arranged above the supporting wallboards, and an air duct located between the two mounting brackets. Above each mounting bracket, a set of spinning working parts is provided, and the two sets of spinning working parts are symmetrically arranged. Each set of spinning working parts includes a front roller, a middle roller, and a back roller arranged in sequence. On this basis, the spinning frame further includes a headstock drafting drive device and a tailstock drafting drive device, and is characterized in that, The torsional vibration elimination device includes a segmented drafting drive assembly and a back roller drive change gear assembly, where: There are two sets of segmented drafting drive assemblies, which are arranged on the frame in a centrally symmetric structure. The segmented drafting drive assembly includes: A "V"-shaped mounting plate, which is the mounting base of the entire segmented drafting drive assembly. The "V"-shaped mounting plate is inverted above the air duct and fits the cross-section of the air duct. A relief hole is provided on the "V"-shaped mounting plate, and several elongated adjustment holes are provided around the relief hole. The adjustment direction of each adjustment hole is the same and is at an angle of 45° to the horizontal plane. A reduction gearbox, which is arranged on one side of the "V"-shaped mounting plate through a mounting assembly. A reduction component is provided inside the reduction gearbox. The reduction component is composed of five sets of double-row gear assemblies that are sequentially meshed. In addition, a reduction motor is connected to the input end of the reduction gearbox. The reduction motor is placed on the other side of the "V"-shaped mounting plate through the relief of the relief hole. A two-way connecting shaft is connected to the output end of the reduction gearbox. Both ends of the two-way connecting shaft are connected to a roller output connecting shaft through a first coupling. Each roller output connecting shaft is threadedly connected to a back roller. On this basis, the reduction ratio of the reduction gearbox is 50:1, and the reduction gearbox amplifies the torque output by the reduction motor by 1:

50. On this basis, there are four back rollers, namely the first back roller, the second back roller, the third back roller, and the fourth back roller. Among them, the first back roller is connected to the head drafting drive device, the fourth back roller is connected to the tail drafting drive device, and the second back roller and the third back roller are respectively arranged at both ends of the two-way connecting shaft through a second coupling in cooperation with the roller output connecting shaft. The back roller drive change gear assembly is arranged in the head drafting drive device and the tail drafting drive device. The back roller drive change gear assembly includes: Two sets of symmetrically arranged drive units, and both sets of drive units are installed on the mounting wallboard. Among them, each drive unit includes an input gear. The input gear is connected to a first drive gear through a first transmission shaft. The first drive gear is meshed with a second drive gear. The second drive gear is meshed with a variable gear. The variable gear is connected to the first back roller and the fourth back roller through a disassembly and replacement assembly, where: The disassembly and replacement assembly includes a second transmission shaft key-connected to the variable gear. The second transmission shaft is connected to the ends of the first back roller and the fourth back roller through a third coupling. In addition, a bearing is connected to the outer wall of the second transmission shaft, and a fixing component is arranged on the outer wall of the bearing. The fixing component includes a support frame fixedly connected to the mounting frame. A lower bearing seat is provided on the support frame, and an upper bearing seat is connected above the lower bearing seat through bolts. The lower bearing seat and the upper bearing seat are buckled together and arranged outside the bearing.

2. The torsional vibration elimination device for the back roller of a ring spinning frame according to claim 1, characterized in that: In the segmented drafting drive assembly, a first mounting plate and a second mounting plate are respectively provided at the two bottom feet of the "V"-shaped mounting plate. The "V"-shaped mounting plate is mounted on the frame by bolt-connecting the first mounting plate and the second mounting plate to the two mounting frames respectively.

3. The torsional vibration elimination device for the back roller of a ring spinning frame according to claim 2, wherein: A rib plate is provided between the "V"-shaped mounting plate and the first and second mounting plates, and the rib plate is located on one side of the "V"-shaped mounting plate.

4. A torsional vibration elimination device for the rear roller of a ring spinning frame according to claim 1, characterized in that: On the "V"-shaped mounting plate, a proximity switch mounting bracket is further provided on the side close to the reduction motor. A proximity switch element is provided on the proximity switch mounting bracket for detecting the rotation speed of the roller output connecting shaft. In addition, the reduction motor is a servo motor.

5. A torsional vibration elimination device for the rear roller of a ring spinning frame according to claim 1, characterized in that: In the segmented drafting transmission assembly, the mounting assembly includes a first positioning plate rotatably provided on the output shaft of the reduction motor through a bearing. A plurality of adjusting bolts are provided on the first positioning plate, and the adjusting bolts correspond to the adjusting holes in number and position one by one.

6. The torsional vibration elimination device for the back roller of a ring spinning frame according to claim 5, characterized in that: The mounting assembly further includes a second positioning plate rotatably provided on the input shaft of the reduction box through a bearing. A plurality of connecting nuts are provided on the second positioning plate, and the connecting nuts correspond to the adjusting bolts in number. On the basis that the plurality of adjusting bolts are respectively engaged with the adjusting holes, the reduction motor and the reduction box are fixed to the "V"-shaped mounting plate by the cooperation of the ends of the adjusting bolts and the connecting nuts.

7. A torsional vibration elimination device for the rear roller of a ring spinning frame according to claim 1, characterized in that: In the rear roller transmission change gear assembly, the first transmission shaft in any group of transmission units is further connected to a main motor, and the main motor provides power for the input gear.

8. A torsional vibration elimination device for the back roller of a ring spinning frame according to claim 1, characterized in that: The rear roller transmission change gear assembly further includes an adjusting assembly. The adjusting assembly includes an adjusting arm. One end of the adjusting arm is rotatably provided on the mounting wall panel, and the other end forms a limiting structure with the mounting wall panel through a limiting assembly. In addition, the adjusting assembly further includes a rotating shaft. One end of the rotating shaft is fixedly provided in the middle of the adjusting arm, and the other end of the rotating shaft is rotatably connected to the second transmission gear.

9. A torsional vibration elimination device for the back roller of a ring spinning frame according to claim 8, characterized in that: In the adjusting assembly, the limiting assembly includes a group of limiting bolts provided on the adjusting arm and an arc-shaped groove provided on the mounting wall panel. One end of the limiting bolt is a limiting end and the other end is a threaded end. The diameter of the limiting end is greater than the width of the arc-shaped groove. The threaded end passes through the arc-shaped groove and the adjusting arm in sequence and is connected to a limiting nut. The position of the limiting bolt in the arc-shaped groove is limited by the tightening degree of the limiting nut and the limiting bolt, and at the same time, the position of the second transmission gear is limited.

10. A torsional vibration elimination device for the rear roller of a ring spinning frame according to claim 9, characterized in that: A handle is provided on the side of the adjusting arm away from the mounting wall panel.

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