Torsional vibration eliminating device for rear roller of ring spinning frame
By coordinating the segmented drafting drive assembly and the rear roller drive gear changing assembly, the gap and draft ratio between the middle roller and the rear roller are adjusted, solving the problem of torsional vibration of the rear roller in the spinning frame, improving output and quality, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-03-10
AI Technical Summary
The torsional vibration phenomenon of the back roller in the existing ring spinning machine has not been completely eliminated, resulting in uneven thickness of the finished ring yarn, affecting output and quality. Moreover, the existing solutions increase equipment costs and space requirements.
By employing a segmented drafting drive assembly and a rear roller drive gear-changing assembly, the torque is amplified through a reduction gearbox, and the spacing between the middle roller and the rear roller and the drafting ratio are adjusted, simplifying the structural design to eliminate torsional vibration.
It improves the output and yarn quality of the spinning machine, reduces the space occupied by the equipment, lowers production costs, and effectively eliminates the torsional vibration phenomenon of the back roller.
Smart Images
Figure CN223983776U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of ring spinning machine technology, specifically relating to a torsional vibration elimination device for the back roller of a ring spinning machine. Background Technology
[0002] Roller torsional vibration is a common operating error in existing ring spinning frames, especially noticeable in extra-long spinning frames. This is because a large roller length-to-diameter ratio causes the torque transmitted by the drafting drive at the head and tail of the spinning frame to lag at the end of each roller. Due to the characteristics of the iron roller material, the end of each roller will experience a sudden release of torque within a certain period of time during the lag, which is the periodic torsional vibration phenomenon. In a specific ring spinning frame, when the middle roller rotates at a constant speed, the torsional vibration at the end of the rear roller will cause periodic unevenness in the feed from the rear roller to the middle roller, resulting in an increase in the number of thick and thin points in the finished yarn and affecting the yarn evenness.
[0003] To reduce torsional vibration of the rear roller, existing technology designs the rear roller in a three-section configuration within the extra-long spinning frame. The torque for the first rear roller section is provided by the drafting drive at the front of the frame. A transition box is added between the first and second rear roller sections to provide torque for the second rear roller section. The torque for the third rear roller section is provided by the drafting drive at the rear of the frame. This design shortens the length of each rear roller section compared to the previous design, thus reducing torsional vibration of the rear roller.
[0004] However, while the aforementioned existing technologies reduce the occurrence of back roller torsional vibration during the operation of the spinning machine, the transition box has a complex internal structure, high design and production costs, and a large size, which occupies the original spindle space of the spinning machine, resulting in a reduction in the number of spindles and thus a decrease in the output of the spinning machine. Furthermore, the setting of the transition box can only reduce the torsional vibration to a certain extent, and cannot eliminate the torsional vibration as much as possible. Therefore, how to design a torsional vibration elimination device for the back roller that can reduce investment and output loss in terms of cost and appearance, and also eliminate the torsional vibration of the back roller as much as possible, is an urgent problem to be solved in the field of textile machinery. Utility Model Content
[0005] In view of this, the present invention provides a torsional vibration elimination device for the back roller of a ring spinning machine. By cooperating between the segmented drafting transmission assembly and the back roller transmission gear changing assembly, the device utilizes a simplified structure to perform segmented drafting transmission of the back roller and adjust the distance between the middle roller and the back roller. Furthermore, the back roller transmission gear changing assembly also adjusts the draft ratio between the back roller and the middle roller, thereby improving the overall output of the ring spinning machine and the quality of the yarn.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A torsional vibration elimination device for the rear roller of a ring spinning frame is mounted on the frame of the spinning frame. The frame consists of several support wall plates, mounting frames symmetrically arranged above the support wall plates, and air ducts located between two mounting frames. Each mounting frame has a set of spinning working sections above it, and the two sets of spinning working sections are symmetrically arranged. Each set of spinning working sections includes a front roller, a middle roller, and a rear roller arranged sequentially. In addition, the spinning frame also includes a head drafting drive and a tail drafting drive. The torsional vibration elimination device includes a segmented drafting drive assembly and a rear roller drive gear changing assembly, wherein:
[0008] Two sets of segmented drafting drive assemblies are provided and are arranged in a centrally symmetrical structure on the frame. The segmented drafting drive assembly includes:
[0009] The “V”-shaped mounting plate is the mounting base for the entire segmented traction transmission assembly. The “V”-shaped mounting plate is inverted and placed above the air duct and matches the cross-section of the air duct. A clearance hole is opened on the “V”-shaped mounting plate, and several elongated adjustment holes are provided around the clearance hole. The adjustment direction of each adjustment hole is the same and they are all at 45° with the horizontal plane.
[0010] The gearbox is mounted on one side of a "V"-shaped mounting plate via a mounting assembly. Inside the gearbox is a reduction assembly consisting of five sets of sequentially meshing double-row gears. Furthermore, the input end of the gearbox is connected to a geared motor, which is positioned on the other side of the "V"-shaped mounting plate via clearance holes. The output end of the gearbox is connected to a bidirectional connecting shaft, both ends of which are connected to roller output connecting shafts via a first coupling. Each roller output connecting shaft is threadedly connected to a rear roller. Based on this, the gearbox has a reduction ratio of 50:1, amplifying the torque output by the geared motor by a ratio of 1:50.
[0011] Based on this, the rear rollers include four rollers, namely the first rear roller, the second rear roller, the third rear roller and the fourth rear roller. The first rear roller is connected to the front traction drive device, the fourth rear roller is connected to the rear traction drive device, and the second and third rear rollers are respectively connected to the roller output connecting shaft at both ends of the bidirectional connecting shaft through a second coupling.
[0012] The rear roller drive gear change assembly is disposed in the front traction drive and the rear traction drive, and the rear roller drive gear change assembly includes:
[0013] Two symmetrically arranged transmission units are mounted on a mounting wall panel. Each transmission unit includes an input gear, which is connected to a first transmission gear via a first transmission shaft. The first transmission gear meshes with a second transmission gear, which meshes with a variable gear. The variable gear is connected to the first and fourth rear rollers via a replacement assembly.
[0014] The replacement assembly includes a second drive shaft connected to the variable gear key. The second drive shaft is connected to the ends of the first and fourth rear rollers via a third coupling. In addition, a bearing is connected to the outer wall of the second drive shaft, and a fixing assembly is provided on the outer wall of the bearing. The fixing assembly includes a support frame fixedly connected to the mounting bracket. A lower bearing seat is provided on the support frame, and an upper bearing seat is bolted to the upper part of the lower bearing seat. The lower bearing seat and the upper bearing seat are interlocked and disposed outside the bearing.
[0015] Preferably, in the segmented traction transmission 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 first mounting plate and the second mounting plate are respectively bolted to the two mounting brackets to realize the mounting of the "V"-shaped mounting plate on the frame.
[0016] Preferably, a rib is provided between the "V"-shaped mounting plate and the first and second mounting plates, and the rib is located on one side of the "V"-shaped mounting plate.
[0017] Preferably, on the "V"-shaped mounting plate, a proximity switch mounting bracket is provided on the side near the geared motor. The proximity switch mounting bracket is provided with a proximity switch element for detecting the rotational speed of the roller output connecting shaft. In addition, the geared motor is a servo motor.
[0018] Preferably, in the segmented traction transmission assembly, the mounting assembly includes a first positioning plate rotatably mounted on the output shaft of the geared motor via a bearing. The first positioning plate is provided with a plurality of adjusting bolts, and the adjusting bolts and the adjusting holes correspond one-to-one in both number and position.
[0019] Preferably, the mounting assembly further includes a second positioning plate rotatably mounted on the input shaft of the gearbox via a bearing. The second positioning plate is provided with a plurality of connecting nuts, and the number of connecting nuts corresponds one-to-one with the number of adjusting bolts. Based on the fact that the plurality of adjusting bolts are respectively engaged with the adjusting holes, the geared motor and the gearbox are fixed on the "V"-shaped mounting plate by the engagement of the ends of the adjusting bolts with the connecting nuts.
[0020] Preferably, in the rear roller drive gear changing assembly, the first drive shaft in any set of transmission units is also connected to a main motor, and the main motor provides power to the input gear.
[0021] Preferably, the rear roller drive gear changing assembly further includes an adjustment assembly, which includes an adjustment arm. One end of the adjustment arm is rotatably mounted on the mounting wall plate, and the other end is connected to the mounting wall plate via a limiting assembly to form a limiting structure. In addition, the adjustment assembly also includes a rotating shaft. One end of the rotating shaft is fixedly mounted 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 assembly includes a set of limiting bolts on the adjustment arm and an arc-shaped groove on the mounting wall plate. 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 larger than the width of the arc-shaped groove. After passing through the arc-shaped groove and the adjustment arm in sequence, the threaded end is connected to the limiting nut. The position of the limiting bolt in the arc-shaped groove is limited by the tightness of the limiting nut and the limiting bolt, and the position of the second transmission gear is also limited.
[0023] Preferably, the adjusting arm has a handle on the side away from the mounting wall panel.
[0024] The beneficial effects of this utility model are as follows:
[0025] In general, the torsional vibration elimination device provided by this utility model is applied to the back roller of a spinning machine. Through the cooperation between the segmented drafting transmission assembly and the back roller transmission gear changing assembly, the device utilizes a simplified structure to perform segmented drafting transmission of the back roller and adjust the distance between the middle roller and the back roller. Furthermore, the back roller transmission gear changing assembly also adjusts the draft ratio between the back roller and the middle roller, thereby improving the overall output of the spinning machine and the quality of the yarn.
[0026] Specifically, the segmented drafting drive assembly, based on the initial torque provided by the geared motor, amplifies the initial torque by a 1:50 ratio using a specially designed gearbox. This allows the entire spinning frame to operate normally while the rear rollers are divided into four sections. The head drafting drive provides torque to the first rear roller, the tail drafting drive provides torque to the fourth rear roller, and the segmented drafting drive assembly simultaneously provides torque to the second and third rear rollers. This configuration shortens the length of each rear roller section and allows for adjustment of the spacing between the middle roller and each rear roller, thereby reducing torsional vibration in each rear roller section and improving the quality of the finished yarn. Furthermore, this invention uses a "V"-shaped mounting plate to fit the geared motor and gearbox onto the spinning frame, simplifying the overall size of the segmented drafting drive assembly and reducing the spindle space it occupies on the spinning frame. Compared to existing spinning frame structures, this reduces production losses, demonstrating the advantage of this device in increasing spinning frame output.
[0027] Based on this, the rear roller drive gear changing assembly, by using the adjusting arm to move the position of the second drive gear, separates the variable gear, the second drive shaft, and the third coupling from the first or fourth rear roller. On this basis, it replaces the variable gear with one of different numbers of teeth to change the rotational speed of the first or fourth rear roller, thereby changing the draft ratio of the rear zone of the spinning frame, further reducing the torsional vibration of the rear roller, and ultimately eliminating the torsional vibration of the entire length of the rear roller as much as possible. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram showing the connection between the drafting transmission structure and the rear roller in the prior art.
[0030] Figure 2 A schematic diagram showing the connection state between the segmented drafting transmission assembly and the rear roller provided for the technical solution of this utility model;
[0031] Figure 3 This is a schematic diagram showing the specific structure of the segmented stretching transmission assembly mounted on the frame in this utility model;
[0032] Figure 4 This is a schematic diagram of the specific structure of the segmented traction transmission assembly in this utility model;
[0033] Figure 5 This is an exploded view of the specific structure of the segmented traction transmission assembly in this utility model;
[0034] Figure 6 This is a schematic diagram of the specific structure of the rear roller drive gear changing assembly in this utility model;
[0035] Figure 7 This is a schematic diagram of the rear roller drive gear changing assembly from another angle in this utility model. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0038] Existing technology designs the rear roller 1 in the overall long carriage of a spinning frame as a three-section design, such as... Figure 1 As shown, specifically, the torque is provided to the first rear roller 101 by the front extension transmission device 4, the torque is provided to the second rear roller 102 by the transition box 2 added between the first rear roller 101 and the second rear roller 102, and the torque is provided to the third rear roller 103 by the rear extension transmission device 3. In this way, the length of each rear roller segment is shortened compared to the previous one, thereby reducing the torsional vibration phenomenon of each rear roller segment.
[0039] However, while the above methods can reduce some of the torsional vibration of the back roller, the use of the transition box 2 occupies the original spindle space of the spinning machine, resulting in a reduction in the number of spindles and thus a decrease in the output of the spinning machine. In fact, eliminating the torsional vibration of the back roller requires a combination of two methods: first, reducing the length-to-diameter ratio of the back roller and simultaneously increasing the distance between the middle roller and the back roller; second, reducing the draft ratio of the back zone, which refers to the area between the middle roller and the back roller.
[0040] In view of this, this technical solution provides a torsional vibration elimination device for the back roller of a ring spinning machine. Through the cooperation between the segmented drafting transmission assembly 5 and the back roller transmission gear changing assembly 6, the back roller is segmented for drafting transmission using a simplified structure. While adjusting the distance between the middle roller and the back roller, the back roller transmission gear changing assembly 6 also adjusts the draft ratio between the back roller and the middle roller, thereby improving the overall output of the spinning machine and the quality of the yarn.
[0041] In this technical solution, such as Figure 3 As shown, a torsional vibration elimination device for the rear roller of a ring spinning frame is installed on the frame 7 of the spinning frame. The frame 7 consists of several support wall plates 701, mounting frames 702 arranged symmetrically above the support wall plates 701, and air ducts 703 located between two mounting frames 702. Each mounting frame 702 has a set of spinning working parts above it, and the two sets of spinning working parts are arranged symmetrically. Each set of spinning working parts includes a front roller 8, a middle roller 9, and a rear roller 1 arranged in sequence. In addition, the spinning frame also includes a head drafting drive device 4 and a tail drafting drive device 3.
[0042] It is important to understand that the spinning frame's working section achieves spinning through the coordinated operation of the front roller 8, middle roller 9, and rear roller 1. In the overall length of the spinning frame, the front roller 8, middle roller 9, and rear roller 1 can reach 20m in length. During the drafting process, torsional vibration occurs in these rollers, necessitating segmented drafting. This application primarily uses a new technical solution to reduce the torsional vibration generated during the operation of the rear roller 1, while also considering the impact of the overall size of the provided device on the original number of spindles, i.e., the original output of the spinning frame. The actual working methods of the front roller 8 and middle roller 9 are not described in detail here.
[0043] Therefore, the core of this application lies in: utilizing the cooperation between the segmented drafting transmission assembly 5 and the rear roller transmission gear changing assembly 6 to improve the overall output and yarn quality of the spinning frame; the rear roller 1 described in this application includes four rollers, namely the first rear roller 101, the second rear roller 102, the third rear roller 103, and the fourth rear roller 104. The first rear roller 101 is connected to the head drafting transmission device 4, and the fourth rear roller 104 is connected to the tail drafting transmission device 3. The specific structure is as follows... Figure 2 As shown.
[0044] As one of the innovative aspects of this utility model, such as Figure 3 As shown, the segmented drafting drive assembly 5 has two sets, which are centrally symmetrically arranged on the frame 7. The segmented drafting drive assembly 5 includes:
[0045] “V” shaped mounting plate 501, such as Figure 4-5 As shown, the "V"-shaped mounting plate 501 is the mounting base of the entire segmented traction transmission assembly 5. The "V"-shaped mounting plate 501 is inverted and installed above the air duct 703 and matches the cross section of the air duct 703. The two bottom feet of the "V"-shaped mounting plate 501 are respectively provided with a first mounting plate 502 and a second mounting plate 503. The first mounting plate 502 and the second mounting plate 503 are respectively bolted to the two mounting brackets 702 to realize the installation of the "V"-shaped mounting plate 501 on the frame 7. In addition, a rib plate 504 is provided between the "V"-shaped mounting plate 501 and the first mounting plate 502 and the second mounting plate 503, and the rib plate 504 is 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 with the first mounting plate 502 and the second mounting plate 503 and installed above the air duct 703. The stability is further enhanced by the rib plate 504, so that the "V"-shaped mounting plate 501 becomes the mounting base of the entire segmented stretching transmission assembly 5.
[0047] In addition, such as Figure 4-5 As shown, a clearance hole 505 is provided on the "V"-shaped mounting plate 501. Several elongated adjustment holes 506 are provided around the clearance hole 505. The adjustment direction of each adjustment hole 506 is the same and they are all at 45° with the horizontal plane.
[0048] In this technical solution, such as Figure 4-5 As shown, the segmented traction transmission assembly 5 also includes a reduction gearbox 507. The reduction gearbox 507 is mounted on one side of the "V"-shaped mounting plate 501 through a mounting assembly. The reduction gearbox 507 has a reduction assembly inside, which consists of five sets of sequentially meshing double-row gear assemblies. In addition, the input end of the reduction gearbox 507 is connected to a reduction motor 508. The reduction motor 508 is positioned on the other side of the "V"-shaped mounting plate 501 through the clearance action of the clearance hole 505.
[0049] Specifically, such as Figure 5 As shown, the mounting assembly includes a first positioning plate 509 rotatably mounted on the output shaft of the geared motor 508 via bearings. The first positioning plate 509 is provided with a plurality of adjusting bolts 510, and the adjusting bolts 510 and adjusting holes 506 correspond one-to-one in both number and position. In addition, the mounting assembly also includes a second positioning plate 511 rotatably mounted on the input shaft of the gearbox 507 via bearings. The second positioning plate 511 is provided with a plurality of connecting nuts 512, and the connecting nuts 512 correspond one-to-one in number with the adjusting bolts 510.
[0050] Based on the above embodiments, with several adjusting bolts 510 respectively engaging with adjusting holes 506, the geared motor 508 and gearbox 507 are fixed to the "V"-shaped mounting plate 501 by engaging the ends of the adjusting bolts 510 with the connecting nuts 512. The setting of the first positioning plate 509 and the second positioning plate 511 increases the stability of fixing the geared motor 508 and gearbox 507, and facilitates the adjustment of the gearbox position by engaging the adjusting bolts 510, connecting nuts 512, and adjusting holes 506.
[0051] Based on the above structure, such as Figure 4-5 As shown, the output end of the gearbox 507 is connected to a bidirectional connecting shaft 513. Both ends of the bidirectional connecting shaft 513 are connected to roller output connecting shafts 515 through a first coupling 514. The two roller output connecting shafts 515 are respectively threaded to the second rear roller 102 and the second rear roller 103. Based on this, the reduction ratio of the gearbox 507 is 50:1, and the gearbox 507 amplifies the torque output by the geared motor 508 by 1:50.
[0052] Thus, based on the fact that the head drafting transmission device 4 provides torque to the first rear roller 101 and the tail drafting transmission device 3 provides torque to the fourth middle roller 104, the present invention simultaneously transmits torque to the second rear roller 102 and the third rear roller 103 through the reduction gearbox 507, thereby shortening the length of each rear roller segment and reducing the length-to-diameter ratio. Furthermore, by using the cooperation of several adjusting bolts 510, connecting nuts 512, and adjusting holes 506, the position of the rear rollers can be adjusted, and the distance between the rear rollers and the middle rollers can be adjusted. Overall, the torsional vibration phenomenon of each rear roller segment is reduced, and the quality of the finished fine yarn is initially improved.
[0053] In this application, the above embodiments take into account the influence of the length-to-diameter ratio of the rear roller and the spacing between the rear roller and the middle roller on the torsional vibration phenomenon of the rear roller. However, another measure to reduce the torsional vibration phenomenon of the rear roller is to reduce the draft ratio of the rear zone. The specific structure for supporting the reduction of the draft ratio of the rear zone will be described in detail below.
[0054] like Figure 6-7 As shown, the rear roller drive gear change assembly 6 is disposed in the front traction drive 4 and the rear traction drive 3. The rear roller drive gear change assembly 6 includes:
[0055] Two sets of symmetrically arranged transmission units are mounted on the mounting wall plate 601. Each transmission unit includes an input gear 602, which is connected to a first transmission gear 604 via a first transmission shaft 603. The first transmission gear 604 is meshed with a second transmission gear 605, which is meshed with a variable gear 606. The variable gear 606 is connected to the first rear roller 101 and the fourth rear roller 104 via a replacement assembly.
[0056] Specifically, the replacement assembly includes a second drive shaft 607 keyed to the variable gear 606, and the second drive shaft 607 is connected to the end of the first rear roller 101 or the fourth rear roller 104 via a third coupling. Figure 7 Taking the connection with the first rear roller 101 as an example, in addition, a bearing is connected to the outer wall of the second drive shaft 607, and a fixing component is provided on the outer wall of the bearing. The fixing component includes a support frame 608 fixedly connected to the mounting bracket 702. A lower bearing seat 609 is provided on the support frame 608, and an upper bearing seat 610 is bolted to the top of the lower bearing seat 609. The lower bearing seat 609 and the upper bearing seat 610 are interlocked and disposed on the outside of the bearing.
[0057] Based on the above embodiments, the variable gear 606 is a plurality of helical gears with different numbers of teeth. The difference in the number of teeth of the gears is directly reflected in the diameter of the gears. That is, when the variable gear 606 is provided with the same linear velocity, the more teeth the variable gear 606 has, the smaller the angular velocity of the variable gear 606. Thus, without changing the transmission of the main force, the rotational speed of the first rear roller 101 or the fourth rear roller 104 can be reduced, that is, the drafting ratio of the rear zone is reduced, thereby reducing the torsional vibration phenomenon of the first rear roller 101 and the fourth rear roller 104. Specifically, when the variable gear 606 is to be replaced, the lower bearing housing 609 and the upper bearing housing 610 are first disassembled and separated. Then, the second drive shaft 607 is separated from the first rear roller 101 or the fourth rear roller 104 using the third coupling. Then, the variable gear 606 on the second drive shaft 607 is removed and replaced.
[0058] Correspondingly, since the geared motor 508 in the segmented drafting transmission assembly 5 is a servo motor, the rotational speeds of the second rear roller 102 and the third rear roller 103 can be controlled by the servo motor to match the rotational speeds of the first rear roller 101 and the fourth rear roller 104. Furthermore, this application also provides a proximity switch mounting bracket 516 on the side of the "V"-shaped mounting plate 501 near the geared motor 508. The proximity switch mounting bracket 516 is equipped with a proximity switch element for detecting the rotational speed of the roller output connecting shaft 515. Based on this, when the gap between the second rear roller 102, the third rear roller 103 and the middle roller is adjusted using the segmented drafting transmission assembly 5, the rear roller transmission gear changing assembly 6 can also adjust the position of the first rear roller 101 and the fourth rear roller 104 to match the second rear roller 102 and the third rear roller 103 through the connection position of the support frame 608 and the lower bearing seat 609, thereby eliminating the torsional vibration phenomenon along the entire length of the rear roller 1 as much as possible.
[0059] In addition, such as Figure 6-7 As shown, in the rear roller drive gear changing assembly 6, the first drive shaft 603 in any set of transmission units is connected to a main motor, which provides power to the input gear 602. It should be noted that during operation, the main motor not only provides rotational power to the rear roller 1, but also provides power to the front roller and middle roller through other transmission mechanisms. Changing the draft ratio of the rear zone only requires changing the speed of the rear roller 1, without changing the speed of the front roller and middle roller. This is the fundamental reason why the above structure is used to change the gears of the variable gear 606. The main motor is not shown in the figure.
[0060] Based on the above embodiments, torsional vibration along the entire length of the rear roller 1 can be eliminated as much as possible. Furthermore, this application provides adaptive settings for the process of the main motor providing power transmission to the first rear roller 101 and the fourth rear roller 104 after gear replacement. Specifically, for example… Figure 6-7 As shown, the rear roller drive gear changing assembly 6 also includes an adjustment assembly, which includes an adjustment arm 611. One end of the adjustment arm 611 is rotatably mounted on the mounting wall plate 601, and the other end is connected to the mounting wall plate 601 through a limiting assembly to form a limiting structure. In addition, the adjustment assembly also includes a rotating shaft 612. One end of the rotating shaft 612 is fixedly mounted 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 on the adjusting arm 611 and an arc-shaped groove 614 on the mounting wall plate 601. One end of the limiting bolt 613 is a limiting end and the other end is a threaded end. The diameter of the limiting end is larger than the width of the arc-shaped groove 614. After the threaded end passes through the arc-shaped groove 614 and the adjusting arm 611 in sequence, it is connected to the limiting nut 615. The position of the limiting bolt 613 in the arc-shaped groove 614 is limited by the tightness of the limiting nut 615 and 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 it is necessary to replace the variable gear 606, before replacing the variable gear 606, the second transmission gear 605 is first raised by raising the adjusting arm 611 so that it is not engaged with the variable gear 606. Then, the variable gear 606 is replaced. Then, the adjusting arm 611 is lowered so that the second transmission gear is engaged with the variable gear 606. Then, the limiting nut 615 is tightened to limit the position of the second transmission gear 605. In addition, in order to facilitate the operator to raise the adjusting arm 611, this application also provides a handle 616 on the side of the adjusting arm 611 away from the mounting wall plate 601.
[0063] Specifically, the segmented drafting drive assembly 5, based on the initial torque provided by the geared motor 508, amplifies the initial torque by a ratio of 1:50 using a specially designed gearbox 507. Under the premise that the entire spinning frame can operate normally, the rear roller 1 is set into four segments. The drafting drive device 4 at the front of the frame provides torque to the first rear roller 101, and the drafting drive device 3 at the rear of the frame provides torque to the fourth rear roller 104. The segmented drafting drive assembly 5 simultaneously provides torque to the second rear roller 102 and the third rear roller 103 in both directions. This setting shortens the length of each rear roller segment and also takes into account the adjustment of the spacing between the middle roller and each rear roller, thereby reducing the torsional vibration phenomenon of each rear roller segment and improving the quality of the finished yarn.
[0064] Based on this, the rear roller drive gear changing assembly 6, under the premise of moving the position of the second drive gear 605 by using the adjusting arm 611, separates the variable gear 606 and the second drive shaft 607 from the first rear roller 101 or the fourth rear roller 104 through the third coupling, and on this basis, replaces the variable gear 606 with different numbers of teeth to change the rotational speed of the first rear roller 101 and the fourth rear roller 104, thereby changing the draft ratio of the rear zone of the spinning frame, further reducing the torsional vibration phenomenon of the rear roller, and finally eliminating the torsional vibration phenomenon of the entire length of the rear roller 1 as much as possible.
[0065] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A torsional vibration elimination device for a back roller of a ring spinning frame, which is arranged on a frame of the spinning frame, the frame is composed of a plurality of support wall plates, mounting racks symmetrically arranged above the support wall plates, and air ducts between the two mounting racks, a group of spinning working parts is arranged above each mounting rack, and the two groups of spinning working parts are symmetrically arranged, each group of spinning working parts comprises front rollers, middle rollers and back rollers arranged in sequence, on this basis, the spinning frame further comprises a head draft transmission device and a tail draft transmission device, characterized in that, The torsional vibration elimination device comprises a segmented draft transmission assembly and a rear roller transmission gear assembly, wherein: The segmented draft transmission assembly is provided with two groups and is arranged on the frame in a central symmetric structure, and the segmented draft transmission assembly comprises: The "V"-shaped mounting plate is the mounting base of the entire segmented draft transmission assembly, is arranged upside down above the air duct and is matched with the cross section of the air duct, a clearance hole is formed in the "V"-shaped mounting plate, a plurality of strip-shaped adjusting holes are arranged around the clearance hole, the adjusting direction of each adjusting hole is the same and is 45° with the horizontal plane; A reduction gearbox is arranged on one side of the "V"-shaped mounting plate through a mounting assembly, a reduction assembly is arranged in the reduction gearbox, the reduction assembly is composed of five groups of double-row gear assemblies which are sequentially engaged, 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 clearance function of the clearance hole, a bidirectional connecting shaft is connected to the output end of the reduction gearbox, the two ends of the bidirectional connecting shaft are both connected to roller output connecting shafts through first shaft couplings, each roller output connecting shaft is threadedly connected to a rear 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, the rear rollers comprise four, which are a first rear roller, a second rear roller, a third rear roller and a fourth rear roller, wherein the first rear roller is connected to the head draft transmission device, the fourth rear roller is connected to the tail draft transmission device, and the second rear roller and the third rear roller are arranged on the two ends of the bidirectional connecting shaft through a second shaft coupling and a roller output connecting shaft respectively; The rear roller transmission gear assembly is arranged in the head draft transmission device and the tail draft transmission device, and the rear roller transmission gear assembly comprises: Two groups of symmetrically arranged transmission units are mounted on the mounting wall plate, wherein each group of transmission units comprises an input gear, the input gear is connected to a first transmission gear through a first transmission shaft, the first transmission gear is connected to a second transmission gear in a meshing manner, the second transmission gear is connected to a variable gear in a meshing manner, and the variable gear is connected to the first rear roller and the fourth rear roller through a replacement assembly, wherein: The replacement assembly comprises a second transmission shaft which is connected to the variable gear in a key connection manner, the second transmission shaft is connected to the end of the first rear roller and the fourth rear roller through a third shaft coupling, in addition, a bearing is connected to the outer wall of the second transmission shaft, a fixing assembly is arranged on the outer wall of the bearing, the fixing assembly comprises a support frame which is fixedly connected to the mounting frame, a lower bearing seat is arranged on the support frame, an upper bearing seat is connected to the upper side of the lower bearing seat through bolts, and the lower bearing seat and the upper bearing seat are mutually buckled and arranged outside the bearing.
2. A torsional vibration cancellation device for a back roller of a ring spinning frame according to claim 1, characterized in that: In the segmented draft transmission assembly, first and second mounting plates are arranged at the two bottom feet of the "V"-shaped mounting plate, the first and second mounting plates are respectively bolted to the two mounting frames, and the "V"-shaped mounting plate is mounted on the frame.
3. A torsional vibration cancellation device for a back roller of a ring spinning frame according to claim 2, characterized in that: The "V"-shaped mounting plate is provided with a rib plate between the first mounting plate and the second mounting plate, and the rib plate is located on one side of the "V"-shaped mounting plate.
4. A torsional vibration cancellation device for a back roller of a ring spinning frame according to claim 1, characterized in that: On the "V"-shaped mounting plate, a proximity switch mounting rack is further provided on the side close to the speed reducer motor, and a proximity switch element is arranged on the proximity switch mounting rack, which is used to detect the rotating speed of the roller output connecting shaft; in addition, the speed reducer motor is a servo motor.
5. A torsional vibration cancellation device for a back roller of a ring spinning frame according to claim 1, characterized in that: In the segmented draft transmission assembly, the mounting assembly comprises a first positioning plate rotatably arranged on the output shaft of the speed reducer motor through a bearing, and a plurality of adjusting bolts are arranged on the first positioning plate, and the adjusting bolts and the adjusting holes one-to-one correspond in number and position.
6. A torsional vibration cancellation device for a back roller of a ring spinning frame according to claim 5, characterized in that: The mounting assembly further comprises a second positioning plate rotatably arranged on the input shaft of the speed reducer box through a bearing, and a plurality of connecting nuts are arranged on the second positioning plate, and the connecting nuts and the adjusting bolts one-to-one correspond in number, and on the basis that the plurality of adjusting bolts are matched with the adjusting holes, the speed reducer motor and the speed reducer box are fixed on the "V"-shaped mounting plate through the cooperation of the end of the adjusting bolt and the connecting nut.
7. A torsional vibration cancellation device for a back roller of a ring spinning frame according to claim 1, characterized in that: In the rear roller transmission gear shifting assembly, the first transmission shaft in any one of the transmission units is further connected with a main motor, and the main motor provides power for the input gear.
8. A torsional vibration cancellation device for a back roller of a ring spinning frame according to claim 1, characterized in that: The rear roller transmission gear shifting assembly further comprises an adjusting assembly, the adjusting assembly comprises an adjusting arm, one end of the adjusting arm is rotatably arranged on the mounting wall plate, the other end of the adjusting arm forms a limiting structure with the mounting wall plate through a limiting assembly, and in addition, the adjusting assembly further comprises a rotating shaft, one end of the rotating shaft is fixedly arranged on the middle part of the adjusting arm, and the other end of the rotating shaft is rotatably connected with the second transmission gear.
9. A torsional vibration cancellation device for a back roller of a ring spinning frame according to claim 8, characterized in that: In the adjusting assembly, the limiting assembly comprises a group of limiting bolts arranged on the adjusting arm and an arc-shaped groove arranged on the mounting wall plate, wherein one end of the limiting bolt is a limiting end, the other end is a threaded end, the diameter of the limiting end is greater than the width of the arc-shaped groove, and the threaded end is connected with a limiting nut after sequentially penetrating the arc-shaped groove and the adjusting arm, and 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 the position of the second transmission gear is limited.
10. A torsional vibration cancellation device for a back roller of a ring spinning frame according to claim 9, characterized in that: The adjusting arm is provided with a handle on the side away from the mounting wall plate.