A mixing and pressurized drafting mechanism for a drawing frame and a control method thereof

Abstract

The application discloses a mixed pressurizing drafting mechanism for a drawing frame and a control method thereof, and the mixed pressurizing drafting mechanism comprises a roller base, a front press roller base structure, a cradle base, a roller assembly, a top roller hanging structure, an air support assembly and a controller, the front press roller base structure is arranged on the roller base, and the front press roller base structure and a rear press roller assembly are close to each other to clamp a trumpet mouth; the roller assembly is arranged on both sides of the roller base in the width direction and is parallel to the cradle base; the top roller hanging structure comprises a cradle shell, a guide top roller pressurizing assembly and a guide top roller assembly; one end of the air support assembly is rotationally connected to the cradle base, and the other end is rotationally connected to the cradle shell; and the controller is suitable for controlling the guide top roller pressurizing assembly and the top roller pressurizing base assembly to positively pressurize the guide top roller assembly and the top roller assembly respectively, so that the feeding fibers are clamped and drafted. The application also provides a mixed pressurizing control method, which ensures that the guide top roller and the top roller are normally pressurized and the top roller is accurately pressurized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile devices, in particular to a mixed pressure drafting mechanism for a drawing frame and a control method thereof. BACKGROUND

[0002] In the existing spinning process, the drawing frame is an intermediate link in the spinning process and is indispensable, and is a key process for improving yarn quality. Its role is to effectively control the weight deviation of the sliver, improve the uniformity, straightness and parallelism of the fiber, and make the fibers of different qualities more evenly mixed in the sliver to create conditions for obtaining good yarn.

[0003] The drafting component is the core component of the drawing frame, which functions to combine and draft the multiple fibers fed through the nip formed by the roller and the skin roller by high-speed rotation of the roller to improve the uniformity, straightness and parallelism of the fibers, and to create necessary conditions for obtaining good yarn.

[0004] The stability of the drafting component and the precision of the pressure directly affect the sliver and yarn quality, and small pressure is prone to form thick spots, and large pressure is prone to form thin spots.

[0005] In the prior art, the pressure of the traditional drafting mechanism is generally spring pressure or cylinder pressure, among which the cylinder pressure is not sensitive, and the spring pressure is unstable. SUMMARY

[0006] The main purpose of the present application is to provide a mixed pressure drafting mechanism for a drawing frame and a control method thereof, which aims to solve the technical problem that the pressure of the drafting mechanism in the traditional drawing frame is not sensitive by cylinder pressure and unstable by spring pressure.

[0007] To achieve the above purpose, the present application provides a mixed pressure drafting mechanism for a drawing frame, which comprises:

[0008] A roller base is provided with a rear pressure roller assembly;

[0009] A front pressure roller seat structure is arranged on the roller base, and the front pressure roller seat structure and the rear pressure roller assembly are close to each other to clamp the trumpet mouth;

[0010] A cradle seat is arranged on both sides of the roller base in the width direction, and is located away from the front pressure roller seat structure;

[0011] A roller assembly is arranged on both sides of the roller base in the width direction, and is parallel to the cradle seat;

[0012] The roller hanging structure comprises a cradle shell arranged above the roller assembly, a guide roller pressing assembly arranged in the cradle shell, a roller assembly arranged in parallel with the roller assembly, and a guide roller assembly arranged on both sides of the roller assembly.

[0013] The air supporting assembly is rotatably connected at one end to the cradle base and at the other end to the cradle shell.

[0014] The controller is adapted to control the guide roller pressing assembly and the roller pressing seat assembly to positively press the guide roller assembly and the roller assembly respectively, so as to adjust the fiber holding nip formed by the roller assembly and the roller assembly one by one, thereby clamping and drawing the feeding fiber.

[0015] Optionally, the roller assembly comprises a first roller assembly, a second roller assembly and a third roller assembly connected side by side,

[0016] The first roller assembly comprises a first roller seat and a first roller, two first roller seats are arranged in parallel at both ends of the first roller, and the bottoms of the two first roller seats are respectively mounted on both sides of the roller base in the width direction.

[0017] The second roller assembly and the third roller assembly have the same structure as the first roller assembly.

[0018] Optionally, it further comprises a torsion air cylinder assembly connected to the first roller seat, the torsion air cylinder assembly comprises a torsion air cylinder seat connected to the first roller seat, a torsion air cylinder body vertically mounted on the upper surface of the torsion air cylinder seat, and a pressure rod rotatably connected to the upper surface of the torsion air cylinder body, the pressure rod is adapted to rotate a certain angle to pressurize or depressurize the cradle shell.

[0019] Optionally, the front pressure roller seat structure comprises a front pressure roller assembly, a manual pressing assembly, a sensing module assembly, a pressure roller bottom plate and a rotating shaft seat,

[0020] The front pressure roller assembly comprises a front pressure roller combination arranged in parallel with the rear pressure roller combination and a front pressure roller seat connected to the rotating shaft seat, the front pressure roller combination is horizontally mounted on the front pressure roller seat, and the bottom of the front pressure roller seat is connected to the pressure roller bottom plate through the rotating shaft seat.

[0021] The manual pressing assembly comprises a pressing handle combination, a handle seat fixed to the pressure roller bottom plate, and a handle block hingedly connected to the handle seat, one end of the pressing handle combination is hingedly connected between the handle seat and the handle block, and the other end is rotatably connected to the front pressure roller seat.

[0022] The induction module assembly is installed on the press roller bottom plate and located between the front press roller seat and the handle seat.

[0023] Optionally, the skin roller hanging structure comprises a cradle shell, a guide skin roller pressing assembly and a guide skin roller assembly, wherein:

[0024] The cradle shell comprises a pair of symmetrically arranged left and right cradle shells, and the left and right cradle shells are located directly above the roller assembly, and one end of each of the left and right cradle shells is rotationally connected to the inner side of the cradle seat, and the other end of each of the left and right cradle shells is connected by the gas strut assembly.

[0025] The guide skin roller pressing assembly comprises guide skin roller double-shaft air cylinders, air cylinder piston rods, sleeves connected to the bottom of the air cylinder piston rods, second springs and first pressing shafts, two guide skin roller double-shaft air cylinders are respectively installed in the left and right cradle shells, the air cylinder piston rods are installed in the guide skin roller double-shaft air cylinders and are adapted to move relatively along the guide skin roller double-shaft air cylinders, the first pressing shafts are connected to the central positions of the air cylinder piston rods through the sleeves, the sleeves are further provided with second springs sleeved on the pressing shafts, and the first pressing shafts are adapted to press on the guide skin roller assembly.

[0026] The guide skin roller assembly comprises a skin roller hanging plate and a guide skin roller, one end of the skin roller hanging plate is locked on the first pressing shaft by a screw, and the two ends of the guide skin roller are respectively installed on the lower sides of the left and right cradle shells through the other end of the skin roller hanging plate.

[0027] Optionally, the skin roller hanging structure further comprises a skin roller assembly, the skin roller assembly comprises first, second and third skin roller assemblies and a skin roller pressing seat assembly, and the first, second and third skin roller assemblies are installed on the lower sides of the left and right cradle shells through the skin roller hanging plate.

[0028] Optionally, each skin roller pressing seat assembly comprises a bolt, a nut, a second pressing shaft, an adjusting sleeve, a pressing spring, a pressing seat, a lock cover and a second screw, the second pressing shaft is vertically arranged in a closed space formed by the pressing seat and the lock cover and extends out of the pressing seat at both ends, the lock cover is sealed to the bottom of the pressing seat by the second screw, the pressing spring is sleeved on the second pressing shaft and located in the pressing seat, a gap between the second pressing shaft and the upper end of the pressing seat is further sleeved with the adjusting sleeve, and the bolt is connected to the top end of the second pressing shaft through the nut.

[0029] Optionally, the first roller assembly comprises a roller, a support seat structure and a spring clamping plate structure, two ends of the roller are connected to the spring clamping plate structure through the support seat structure;

[0030] The support seat structure comprises a support seat, a double bearing, a bearing retainer, an axial baffle, a screw and a transition connecting shaft, the double bearing is installed on the roller through the bearing retainer and the axial baffle, the support seat is sleeved outside the double bearing, the bearing retainer and the axial baffle, and the support seat is fixed on the end face of the roller through the screw, and the spring clamping plate structure is fixed on the support seat through the transition connecting shaft;

[0031] The spring clamping plate structure comprises a first hinged plate, a second hinged plate, a hinged shaft and a clamping spring, the first hinged plate and the second hinged plate are connected through the hinged shaft and the clamping spring, the first hinged plate is sleeved at the end of the transition connecting shaft, and the second hinged plate is connected to the bottom of the roller pressing seat assembly.

[0032] Optionally, the air support assembly comprises a rotary air cylinder, a first connecting piece connected to the cradle seat and a second connecting piece connected to the cradle shell, and the first connecting piece and the second connecting piece are respectively connected to two ends of the rotary air cylinder on the side close to each other.

[0033] The application also provides a mixing and pressing control method for a drawing frame, which adopts the mixing and pressing drafting mechanism for the drawing frame, and comprises the following steps:

[0034] Step S 100 When it is detected that the cradle shell is placed in position, the controller controls the rotary air cylinder assembly to rotate by a certain angle to press on the upper end of the cradle shell, so that the cradle shell is pressed;

[0035] Step S 200 The controller controls the guide roller pressing assembly to work, the guide roller double-shaft air cylinder is extended and drives the sleeve to compress the spring, so that the guide roller assembly is positively pressed;

[0036] Step S 300 The roller assembly works, so that the roller pressing seat assembly normally presses the first roller assembly, the second roller assembly and the third roller assembly, respectively, the roller assembly and the roller assembly one by one form a fiber holding jaw, and the fed sliver is clamped and drafted;

[0037] Step S 400When the drawing of the sliver needs to be stopped for completing the drawing, the controller controls the torsion cylinder assembly to work for a period of time, and the torsion cylinder assembly rotates for a certain angle to make the pressure rod away from the upper end surface of the cradle shell, at this time the guide roller assembly and the torsion cylinder assembly are unloaded.

[0038] Compared with the prior art, the application has the following beneficial effects:

[0039] 1. In the technical scheme of the application, the mixed pressure drafting mechanism is used on the drawing frame, the roller base of the mixed pressure drafting mechanism is used to bear the drafting components of the rollers, the back pressure roller assembly is arranged on the roller base, the front pressure roller seat structure is arranged on the roller base 1, the front pressure roller seat structure and the back pressure roller assembly are close to each other to clamp the trumpet, and the sliver is introduced; the cradle seat is arranged on the two sides in the width direction of the roller base and is located away from the front pressure roller seat structure, and the roller assembly is arranged on the two sides in the width direction of the roller base and is parallel to the cradle seat; the controller is electrically connected with the guide roller pressure assembly and the roller pressure seat assembly respectively, is used to switch the working states of the guide roller pressure assembly and the roller pressure seat assembly at the same time, is used to control the activities of the guide roller pressure assembly and the roller pressure seat assembly at the same time, the controller controls the guide roller pressure assembly and the roller pressure seat assembly to positively press the guide roller assembly and the roller assembly respectively, adjusts the fiber holding nip formed by the roller assembly and the roller assembly one by one, and clamps and drafts the feeding fiber. Thus, the normal pressure of the guide roller and the roller is guaranteed; one end of the air support assembly is rotationally connected to the cradle seat, and the other end is rotationally connected to the cradle shell. In this way, by designing the mixed pressure drafting mechanism, the normal pressure of the guide roller and the roller can be guaranteed.

[0040] 2. The mixed pressure drafting mechanism can realize the automatic operation of the roller pressure loading and unloading, greatly reduces the operation requirements and working strength of the workers, and improves the working efficiency; meanwhile, by arranging the roller hanging structure 6 and the air support assembly 7, the damage of the roller due to the untimely unloading can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0042] Figure 1 The three-dimensional structure schematic diagram of the mixed pressure drafting mechanism for the drawing frame provided in the embodiments of the application;

[0043] Figure 2 A front view structural schematic diagram of a mixing and pressing drafting mechanism for a drawing frame provided in an embodiment of the present application;

[0044] Figure 3 A structural schematic diagram of a roller base provided in an embodiment of the present application;

[0045] Figure 4 A structural schematic diagram of a rear pressing roller combination provided in an embodiment of the present application;

[0046] Figure 5 A front view structural schematic diagram of a front pressing roller base structure provided in an embodiment of the present application;

[0047] Figure 6 A one-direction structural schematic diagram of a front pressing roller base structure provided in an embodiment of the present application;

[0048] Figure 7 Another-direction structural schematic diagram of a front pressing roller base structure provided in an embodiment of the present application;

[0049] Figure 8 An exploded structural schematic diagram of a front pressing roller combination provided in an embodiment of the present application;

[0050] Figure 9 An assembly structural schematic diagram of a front pressing roller base and a rotating shaft base provided in an embodiment of the present application;

[0051] Figure 10 An exploded structural schematic diagram of a pressing handle combination provided in an embodiment of the present application;

[0052] Figure 11 A structural schematic diagram of a sensing module assembly provided in an embodiment of the present application;

[0053] Figure 12 An assembly structural schematic diagram of a rotating shaft base and a pressing roller base plate provided in an embodiment of the present application;

[0054] Figure 13 An assembly structural schematic diagram of a torsion cylinder assembly, a roller assembly and a roller base provided in an embodiment of the present application;

[0055] Figure 14 A structural schematic diagram of a torsion cylinder assembly provided in an embodiment of the present application;

[0056] Figure 15 An exploded structural schematic diagram of a roller assembly provided in an embodiment of the present application;

[0057] Figure 16 A structural schematic diagram of a cover roller hanging structure provided in an embodiment of the present application;

[0058] Figure 17 A structural schematic diagram of a guide cover roller pressing assembly provided in an embodiment of the present application;

[0059] Figure 18 Figure 1 is a schematic view of the assembly structure of the guide roller pressing assembly, the guide roller assembly and the roller assembly in the embodiment of the present application;

[0060] Figure 19 Figure 2 is a schematic view of the front structure of the roller hanging structure in the embodiment of the present application;

[0061] Figure 20 Figure 3 is a schematic view of the assembly structure of the cradle shell, the guide roller pressing assembly and the roller assembly in the embodiment of the present application;

[0062] Figure 21 Figure 4 is a schematic view of the cross-sectional structure of the roller pressing seat assembly in the embodiment of the present application;

[0063] Figure 22 Figure 5 is a schematic view of the cross-sectional structure of the first roller assembly in the embodiment of the present application;

[0064] Figure 23 Figure 6 is a schematic view of the structure of the air support assembly in the embodiment of the present application;

[0065] Figure 24 Figure 7 is a schematic view of the mixed pressing control process of the mixed pressing drafting mechanism in the embodiment of the present application;

[0066] Figure 25 Figure 8 is a schematic view of the control process when the non-winding roller in the mixed pressing drafting mechanism in the embodiment of the present application is stopped;

[0067] Figure 26 Figure 9 is a schematic view of the control process when the winding roller in the mixed pressing drafting mechanism in the embodiment of the present application is stopped.

[0068] BRIEF DESCRIPTION OF THE DRAWINGS

[0069] 1 - roller base; 11 - rear press roller assembly; 111 - rear press roller joint; 1111 - rear press roller shaft; 1112 - first deep groove ball bearing; 1113 - rear press roller; 1114 - rotating disc; 1115 - first rotation sensor; 112 - rear press roller seat;

[0070] 2 - front press roller seat structure;

[0071] 21 - front press roller assembly;

[0072] 211 - front press roller joint; 2111 - front press roller shaft; 2112 - second deep groove ball bearing; 2113 - hole elastic retainer; 2114 - front press roller; 2115 - shaft elastic retainer;

[0073] 212 - front press roller seat; 2121 - spring clamp; 2122 - tension spring; 2123 - threaded hook; 213 - angle plate; 214 - rotating shaft seat; 2141 - rotating shaft;

[0074] 22-manual pressure assembly;

[0075] 221-pressure handle combination;

[0076] 2211-handle inner shaft; 2212-handle sleeve; 2213-end cover; 2214-first spring; 2215-rotation lever;

[0077] 222-handle seat; 223-handle block;

[0078] 23-sensing module assembly;

[0079] 231-first sensing seat; 232-second sensing seat; 233-guide screw; 234-sensor combination;

[0080] 24-press roller bottom plate;

[0081] 25-rotation shaft seat; 251-pivot pin; 252-third deep groove ball bearing;

[0082] 3-cradle seat;

[0083] 4-torsion cylinder assembly; 41-torsion cylinder seat; 42-torsion cylinder body; 43-pressing rod;

[0084] 5-roller assembly;

[0085] 51-first roller assembly; 511-first roller seat; 512-first roller; 52-second roller assembly; 521-second roller seat; 522-second roller; 53-third roller assembly; 531-third roller seat; 532-third roller;

[0086] 6-roller suspension structure;

[0087] 61-cradle shell; 611-left cradle shell; 612-right cradle shell; 613-crade in-place sensor; 614-crade shell connecting rod; 615-self-stopping arm;

[0088] 62-guiding roller pressure assembly; 621-guiding roller double-shaft air cylinder; 622-cylinder piston rod; 623-sleeve; 624-second spring; 625-first pressure shaft;

[0089] 64-guiding roller assembly; 641-roller suspension plate; 642-guiding roller;

[0090] 63-roller assembly;

[0091] 631-first roller assembly;

[0092] 6311-roller;

[0093] 6312 - support seat structure; 63121 - support seat; 63122 - double bearing; 63123 - bearing retainer; 63124 - axial baffle; 63125 - first screw; 63126 - transition connecting shaft;

[0094] 6313 - spring clamping plate structure; 63131 - first hinged plate; 63132 - second hinged plate; 63133 - hinged shaft; 63134 - clamping spring;

[0095] 632 - second top roller assembly; 633 - third top roller assembly;

[0096] 634 - top roller pressurizing seat assembly; 6341 - bolt; 6342 - nut; 6343 - second pressurizing shaft; 6344 - adjusting sleeve; 6345 - pressurizing spring; 6346 - pressurizing seat; 6347 - lock cover; 6348 - second screw;

[0097] 7 - air supporting assembly;

[0098] 71 - rotary air cylinder; 72 - first connecting piece; 721 - first spring joint; 722 - first spring ball column; 73 - second connecting piece; 731 - second spring joint; 732 - second spring ball column;

[0099] 8 - trumpet mouth; 9 - cotton plug. DETAILED DESCRIPTION

[0100] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0101] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), if the certain posture changes, the directional indications also change accordingly.

[0102] In addition, if the description of "first", "second", "third" and the like is involved in the embodiments of the present application, the description of "first", "second", "third" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0103] The drawing frame is a necessary equipment in the drawing process of the spinning process. In the general cotton spinning process, the process flow of the carded yarn is opening and cleaning cotton-carding-drawing-roving-spinning, and the process flow of the combed yarn is opening and cleaning cotton-carding-pre-drawing-drawing frame roll-combing-drawing-roving-spinning. The task of the drawing process is to draw, mix, stretch and form the cotton sliver.

[0104] In the existing spinning process, the drawing frame is an intermediate link in the spinning process, is indispensable, is a key process for improving the quality of the finished yarn, effectively controls the weight deviation of the cotton sliver, improves the evenness of the cotton sliver, the straightness and parallelism of the fiber, and makes the fibers of different qualities more uniform in the cotton sliver, so as to create conditions for obtaining good finished yarn.

[0105] The traditional drawing frame swing frame generally uses a spring swing frame to press the drawing roller. In this form, especially in the double-eye drawing frame, the pressure is controlled by a manual pressure mechanism, and the hook is controlled by the manual pressure mechanism to realize the pressure of the swing frame on the roller. This pressure mode has a complex structure, high operation requirements for the operator, and is prone to non-standard operation or damage to the roller due to untimely pressure relief.

[0106] To solve the above technical problems, please refer to Figures 1-26 As shown in the drawing, the embodiment of the present application provides a mixing and pressing drawing mechanism for a drawing frame, which comprises a roller base 1, a front pressure roller seat structure 2, a swing frame seat 3, a roller assembly 5, a roller hanging structure 6, a gas support assembly 7 and a controller, wherein:

[0107] The roller base 1 is used to bear the drawing components of the roller, and preferably, a rear pressure roller assembly 11 is arranged on the roller base 1.

[0108] The front pressure roller seat structure 2 is arranged on the roller base 1, and the front pressure roller seat structure 2 and the rear pressure roller assembly 11 are close to each other to clamp the trumpet 8.

[0109] The rocker seat 3 is arranged on both sides of the roller base 1 in the width direction and is located away from the front press roll seat structure 2.

[0110] The roller assembly 5 is arranged on both sides of the roller base 1 in the width direction and is parallel to the rocker seat 3.

[0111] The top roll hanging structure 6 includes a rocker shell 61 arranged above the roller assembly 5, a guide top roll press assembly 62 located in the rocker shell 61, a top roll assembly 63 arranged in parallel and spaced apart from the roller assembly 5, and a guide top roll assembly 64 pressed on both sides of the top roll assembly 63.

[0112] One end of the air support assembly 7 is rotatably connected to the rocker seat 3, and the other end is rotatably connected to the rocker shell 61.

[0113] The controller is adapted to control the guide top roll press assembly 62 and the top roll press seat assembly 634 to positively press the guide top roll assembly 64 and the top roll assembly 63, respectively, to adjust the fiber holding nip formed by the top roll assembly and the roller assembly 5 one by one, thereby clamping and drafting the fed fiber. Specifically, in an embodiment of the present application, the controller is electrically connected to the guide top roll press assembly 62 and the top roll press seat assembly 634, respectively, to simultaneously switch the working state of the guide top roll press assembly 62 and the top roll press seat assembly 634, thereby simultaneously controlling the movement of the guide top roll press assembly 62 and the top roll press seat assembly 634, thereby ensuring the normal pressure of the guide top roll and the top roll.

[0114] In this way, by designing the mixed press drafting mechanism, the normal pressure of the guide top roll and the top roll can be ensured.

[0115] The mixed press drafting mechanism can realize automatic operation of the top roll press and release, greatly reducing the operation requirements and work intensity of the workers and improving the work efficiency; at the same time, by arranging the top roll hanging structure 6 and the air support assembly 7, the damage to the top roll due to untimely release can be avoided.

[0116] Specifically, please refer to Figure 1 In an embodiment of the present application, the mixed press drafting mechanism further includes a torsion air cylinder assembly 4 connected to the first roller seat 511. In the embodiment of the present application, since the first roller seat 511 is arranged as two, the torsion air cylinder assembly 4 is also arranged as two.

[0117] Specifically, in the embodiment, please refer to Figure 13 , Figure 14 As shown in the figure, the torsion air cylinder assembly 4 includes a torsion air cylinder seat 41, a torsion air cylinder body 42, and a pressure rod 43, wherein:

[0118] The torsion cylinder base 41 is connected to the first roller base 511, and the torsion cylinder cylinder body 42 is vertically installed on the upper surface of the torsion cylinder base 41, and the pressing rod 43 is rotatably connected to the upper surface of the torsion cylinder cylinder body 42, and the pressing rod 43 is suitable for rotating a certain angle to press or release the cradle shell 61.

[0119] Therefore, the torsion cylinder assembly 4 is installed outside the first roller base 511 on the left and right sides, and the torsion cylinder assembly 4 can press or release the entire cradle, and a cradle in-place sensor 613 (an optical sensor) is also installed on the side surface of the torsion cylinder cylinder body 42, and when it is detected that the left and right cradles have fallen into place, the pressing rod 43 of the torsion cylinder assembly 4 rotates and presses the cradle.

[0120] Specifically, referring to Figure 3 In the embodiment of the present application, the roller base 1 is used to carry the drafting components of the rollers, and preferably, a back press roller assembly 11 is arranged on the roller base 1, and the back press roller assembly 11 is composed of a back press roller connecting piece 111 and a back press roller base 112, wherein the back press roller base 112 is integrally connected with the roller base 1, thereby improving the product casting efficiency and structural strength.

[0121] In addition, referring to Figure 4 As shown in the figure, the back press roller connecting piece 111 includes a back press roller shaft 1111, a first deep groove ball bearing 1112, a back press roller 1113, a rotating disc 1114, and a first rotation sensor 1115, the back press roller shaft 1111 is horizontally arranged in the back press roller base 112, and the two ends of the back press roller shaft 1111 are respectively connected with the back press roller 1113 and the rotating disc 1114, in order to enable the back press roller 1113 to rotate stably, a pair of first deep groove ball bearings 1112 are arranged on the back press roller shaft 1111, the back press roller shaft 1111 is driven to rotate through the rotating disc 1114, thereby driving the back press roller 1113 to rotate. In addition, in order to control the rotation speed of the back press roller 1113, a first rotation sensor 1115 is arranged near one side of the back press roller shaft 1111, and through the arrangement of the first rotation sensor 1115, the rotation speed of the back press roller 1113 can be detected in real time.

[0122] Specifically, referring to Figure 5 As shown in the figure, in the embodiment of the present application, the front press roller base structure 2 includes a front press roller assembly 21, a manual pressing assembly 22, an induction module assembly 23, a press roller bottom plate 24, and a rotating shaft base 25, wherein:

[0123] The front pressure roller assembly 21 comprises a front pressure roller joint 211 and a front pressure roller seat 212, the front pressure roller joint 211 is horizontally mounted on the front pressure roller seat 212, and the front pressure roller assembly 21 is horizontally parallel and arranged with the rear pressure roller assembly 11. The bottom of the front pressure roller seat 212 is connected to the pressure roller bottom plate 24 through a rotating shaft seat 25, and the front pressure roller seat 212 is connected to the rotating shaft seat 25 through a pin shaft 251 and a third deep groove ball bearing 252.

[0124] As shown in Figure 8 The front pressure roller joint 211 comprises a front pressure roller shaft 2111, a second deep groove ball bearing 2112, a hole elastic retainer 2113, a front pressure roller 2114 and an axle elastic retainer 2115. One end of the front pressure roller shaft 2111 is inserted into the front pressure roller seat 212, and the other end is connected to the front pressure roller 2114 through the second deep groove ball bearing 2112, so that the front pressure roller 2114 can rotate smoothly on the front pressure roller shaft 2111. The second deep groove ball bearing 2112 and the front pressure roller 2114 are axially limited by the hole elastic retainer 2113 and the axle elastic retainer 2115. In order to make the sliver 9 more reasonably enter the trumpet mouth 8, it can smoothly enter the lap plate after being pressed by the front pressure roller 2114 and the rear pressure roller 1113.

[0125] As shown in Figure 5 The manual pressure assembly 22 comprises a pressure handle joint 221, a handle seat 222 and a handle block 223, wherein the handle seat 222 is fixed on the pressure roller bottom plate 24 in a U-shaped structure, the handle block 223 is hingedly connected to the handle seat 222 through a pin shaft, and the handle seat 222 is in an arc-shaped structure. One end of the pressure handle joint 221 is hingedly connected between the handle seat 222 and the handle block 223, and the other end of the pressure handle joint 221 is rotatably connected to the front pressure roller seat 212.

[0126] As shown in Figure 10 Specifically in the embodiment of the present application, the pressure handle joint 221 comprises a handle inner shaft 2211, a handle sleeve 2212, an end cover 2213, a first spring 2214 and a rotating rod 2215, wherein one end of the handle inner shaft 2211 is threadedly connected to the rotating rod 2215, the other end is inserted into the handle sleeve 2212 and is connected and fixed through the end cover 2213, the first spring 2214 is sleeved on the handle inner shaft 2211 and located between the rotating rod 2215 and the handle sleeve 2212.

[0127] The sensing module assembly 23 is mounted on the pressure roller base plate 24 and is located between the front pressure roller base 212 and the handle base 222. Specifically, the sensing module assembly 23 includes a first sensing base 231, a second sensing base 232, a lead screw 233, and a sensor assembly 234. The first sensing base 231 and the second sensing base 232 are arranged opposite each other and connected by the lead screw 233. The sensor assembly 234 is horizontally inserted through the first sensing base 231.

[0128] Specifically, see Figure 13 、 Figure 15 As shown, in the embodiment of the present invention, the roller assembly 5 includes a first roller assembly 51, a second roller assembly 52 and a third roller assembly 53 connected in parallel to each other, wherein:

[0129] The first roller assembly 51 includes a first roller seat 511 and a first roller 512 . The two first roller seats 511 are arranged in parallel at both ends of the first roller 512 , and the bottoms of the two first roller seats 511 are respectively installed on both sides of the roller base 1 in the width direction.

[0130] Similarly, the second roller assembly 52 includes a second roller seat 521 and a second roller 522. The two second roller seats 521 are arranged in parallel at both ends of the second roller 522, and the bottoms of the two second roller seats 521 are respectively installed on both sides of the roller base 1 in the width direction.

[0131] Similarly, the third roller assembly 53 includes a third roller seat 531 and a third roller 532. The two third roller seats 531 are arranged in parallel at both ends of the third roller 532, and the bottoms of the two third roller seats 531 are respectively installed on both sides of the roller base 1 in the width direction.

[0132] Therefore, the first roller 512, the second roller 522 and the third roller 532 are arranged horizontally at a certain interval, and the first roller 512, the second roller 522 and the third roller 532 are respectively installed on the first roller seat 511, the second roller seat 521 and the third roller seat 531, and the first roller seat 511, the second roller seat 521 and the third roller seat 531 are provided with grooves for clamping the leather roller assembly 63.

[0133] In this embodiment, the torsion cylinder assembly 4 is installed on the first roller seat 511, and its cylinder body moves the anti-twist adjustable stroke energy-saving cylinder, which is used to use kinetic energy to form a large impact force during the working stroke. Figure 2 As shown, in this embodiment, the torsion cylinder assembly 4 comprises a torsion cylinder base 41, a torsion cylinder body 42, and a pressure rod 43. The pressure rod 43 and the torsion cylinder body 42 are integrated via an anti-twist and stroke adjustment mechanism, resulting in a simple and compact design. Because the stroke can be adjusted, unnecessary cylinder travel and ineffective compressed gas consumption are reduced accordingly.

[0134] Specifically, referring to Figure 16 、 Figure 19 illustrated in the embodiment of the present application, the roller hanging structure 6 includes a cradle shell 61, a guide roller pressing assembly 62, a roller assembly 63 and a guide roller assembly 64, wherein:

[0135] To ensure the stability and reliability of the pressure of the spinning and twisting machine roller, to facilitate the adjustment of the pressure, and to rapidly reverse, the size of the pressure and the reversing can be controlled by the electric appliance and the microcomputer to meet the production requirements of the automatic machine. In the embodiment, the cradle shell 61 includes a pair of symmetrically arranged left cradle shell 611 and right cradle shell 612, the left cradle shell 611 and the right cradle shell 612 are located directly above the first roller seat 511, the second roller seat 521 and the third roller seat 531, and one end of the left cradle shell 611 and the right cradle shell 612 is rotatably connected to the inner side of the cradle seat 3, and the other end of the left cradle shell 611 and the right cradle shell 612 is connected by the air support assembly 7. In this way, the left cradle shell 611 and the right cradle shell 612 are installed on the cradle seat 3, and the left cradle shell 611 and the right cradle shell 612 can rotate around the center of rotation of the cradle seat 3. The top of the left cradle shell 611 and the right cradle shell 612 is also connected with a self-stop arm 615.

[0136] Under the action of the guide roller pressing assembly 62, the first pressing shaft 625 is tightly pressed on the corresponding guide roller with a certain pressure, so as to adjust the installation distance between the guide roller and the first roller as needed, and further improve the compact spinning effect.

[0137] In the embodiment, referring to Figure 17 illustrated, the guide roller pressing assembly 62 includes a guide roller double-shaft air cylinder 621, an air cylinder piston rod 622, a sleeve 623, a second spring 624 and a first pressing shaft 625, two guide roller double-shaft air cylinders 621 are respectively installed in the same position in the left cradle shell 611 and the right cradle shell 612, the air cylinder piston rod 622 is installed in the guide roller double-shaft air cylinder 621 and is adapted to move relatively along the guide roller double-shaft air cylinder 621, the sleeve 623 is connected to the bottom of the air cylinder piston rod 622, the first pressing shaft 625 is connected to the center position of the air cylinder piston rod 622 through the sleeve 623, and the second spring 624 is arranged on the first pressing shaft 625 between the sleeve 623 and the air cylinder piston rod 622, so that the first pressing shaft 625 is tightly pressed on the guide roller 642, at this time the second spring 624 in the sleeve 623 is compressed and deformed, and the elastic force generated by the deformation of the second spring 624 acts vertically on the guide roller 642, and the guide roller 642 further acts the pressure on the guide roller.

[0138] The guide roller biaxial cylinder 621 is installed at the inner front end of the cradle shell 61, the sleeve 623 is installed on the cylinder piston rod 622, the first pressing shaft 625 is sleeved with the second pressing spring 624, and the guide plate is arranged on the second pressing spring 624 to prevent the spring from tilting. In this way, the pressing force of the guide roller 642 is fixed and does not need to be adjusted.

[0139] Please refer to Figure 24 When the PLC program of the controller sends a command to the cradle in-place sensor 613, the torsion cylinder assembly 4 starts to pressurize, and after the cradle pressurization electromagnetic valve delays for a time t0, the PLC program of the controller sends a command to the guide roller biaxial cylinder 621, the guide roller biaxial cylinder 621 extends the cylinder piston rod 622, the sleeve 623 is installed on the cylinder piston rod 622, the cylinder piston rod 622 drives the sleeve 623 installed on the piston block, the guide block in the sleeve 623 is installed on the upper end of the second spring 624, the cylinder piston rod 622 extends to drive the sleeve 623 to compress the second spring 624, the first pressing shaft 625 is pressed on the outer shell of the guide roller 642 to pressurize the guide roller 642, and after the roller pressurization electromagnetic valve delays for a time t1, the control main motor starts to work.

[0140] Please refer to Figure 18 As shown in the figure, the guide roller assembly 64 includes the roller hanging plate 641 and the guide roller 642, one end of the roller hanging plate 641 is locked on the first pressing shaft 625 through a screw, and the two ends of the guide roller 642 are respectively installed on the lower sides of the left cradle shell 611 and the right cradle shell 612 through the other end of the roller hanging plate 641.

[0141] When the guide roller assembly 64 is in the pressurized state, the guide roller assembly 64 is clamped in the inclined groove of the first roller seat 511, at this time, the guide roller 642 is tangent to the first roller 512, so that the normal pressure of the guide roller 642 is ensured, and the first roller 512, the second roller 522 and the third roller 532 are all vertically pressed, that is, the normal pressure of all the rollers 6311 and the rollers is ensured, the pressurization is stable and reliable, and precise pressurization is realized.

[0142] Please refer to Figure 26 As shown in the figure, when the cotton winding fault occurs, the controller sends a command to the guide roller biaxial cylinder 621 (cylinder roller electromagnetic valve), the guide roller biaxial cylinder 621 is first released, the cylinder piston rod 622 is retracted, the second spring 624 is elongated, and the guide roller 642 is released. Then the torsion cylinder assembly 4 (cradle roller electromagnetic valve) is released, the pressure rod 43 is rotated by 90°, and the entire cradle shell 61 is released. At this time, the cradle shell connecting rod 614 can be lifted, the air support assembly 7 supports the entire cradle shell 61 and the roller assembly 63, the rollers 6311 are separated from the rollers, and the cotton winding on the rollers and the rollers 6311 is convenient to handle.

[0143] Similarly, please refer to Figure 25 As shown, when the cotton mill is to be parked for a long time, in order to avoid the deformation of the top roller 6311 under pressure for a long time, all the top rollers 6311 also need to be released, and all actions are controlled by the PLC program of the controller to make the actions orderly completed and the control accurate.

[0144] Please refer to Figure 16 、 Figure 19 As shown, in the embodiment of the present application, the top roller assembly 63 includes a first top roller assembly 631, a second top roller assembly 632, a third top roller assembly 633 and a top roller pressurizing seat assembly 634, and the first top roller assembly 631, the second top roller assembly 632 and the third top roller assembly 633 are installed on the lower side of the left rocker shell 611 and the right rocker shell 612 through the top roller hanging plate 641, wherein:

[0145] Thus, in order to provide greater drafting force, the top roller assembly 63 is arranged above the roller assembly, and the fibers can be drafted through the grip between the top roller and the roller. As a preferred embodiment of the present application, the top roller assembly 63 is arranged in three groups, which are the first top roller assembly 631, the second top roller assembly 632 and the third top roller assembly 633, each group has the same structure, and in order to dynamically adjust the gap between each group of top rollers and rollers, please refer to Figure 16 、 Figure 19 As shown, the first top roller assembly 631 includes a top roller 6311, a support seat structure 6312 and a spring clamping plate structure 6313, and both ends of the top roller 6311 are connected to the spring clamping plate structure 6313 through the support seat structure 6312.

[0146] In this way, the first top roller, the second top roller and the third top roller correspond to the first roller 512, the second roller 522 and the third roller 532 respectively, and the guide top roller 642 corresponds to the first roller 512 to form a downward clamping jaw.

[0147] In addition, the guide top roller 642, the first top roller assembly 631, the second top roller assembly 632 and the third top roller assembly 633 are respectively clamped in the seat grooves of the first roller seat 511, the second roller seat 521 and the third roller seat 531, and the second pressurizing shaft 6343 in the top roller pressurizing seat assembly 634 is tangent to the support seat structure 6312, so that the top roller 6311 is pressed tightly with the roller.

[0148] Specifically, please refer to Figure 22As shown, the support seat structure 6312 includes a support seat 63121, two bearings 63122, a bearing retainer 63123, an axial baffle 63124, a first screw 63125 and a transition connecting shaft 63126, the two bearings 63122 are installed on the leather roller 6311 through the bearing retainer 63123 and the axial baffle 63124, and the support seat 63121 is sleeved outside the bearings 63122, the bearing retainer 63123 and the axial baffle 63124, and is fixed on the end face of the leather roller 6311 through the first screw 63125, and the spring clamping plate structure 6313 is fixed on the support seat 63121 through the transition connecting shaft 63126.

[0149] As shown, the spring clamping plate structure 6313 includes a first hinged plate 63131, a second hinged plate 63132, a hinged shaft 63133 and a clamping spring 63134, the first hinged plate 63131 and the second hinged plate 63132 are connected through the hinged shaft 63133 and the clamping spring 63134, so that the first hinged plate 63131 and the second hinged plate 63132 have elastic recovery function, wherein the first hinged plate 63131 is sleeved on the end of the transition connecting shaft 63126, and the second hinged plate 63132 is connected to the bottom of the leather roller pressing seat assembly 634.

[0150] As shown in Figure 19 , Figure 20 As shown, the leather roller pressing seat assembly 634 adopts a second spring 624 pressing mode to pressurize the leather roller pneumatically to prevent the leather roller pressing pressure from being unstable and affecting the drafting efficiency and quality. In this embodiment, the leather roller pressing seat assembly 634 is arranged at both ends of the first leather roller assembly 631, the second leather roller assembly 632 and the third leather roller assembly 633, as shown in Figure 21 As shown, each leather roller pressing seat assembly 634 includes a bolt 6341, a nut 6342, a second pressing shaft 6343, an adjusting sleeve 6344, a pressing spring 6345, a pressing seat 6346, a lock cover 6347 and a second screw 6348, the second pressing shaft 6343 is vertically arranged in a closed space composed of the pressing seat 6346 and the lock cover 6347, and extends out of the pressing seat 6346 at both ends, and the lock cover 6347 is sealed at the bottom of the pressing seat 6346 through the second screw 6348; the pressing spring 6345 is sleeved on the second pressing shaft 6343 and located in the pressing seat 6346, and the adjusting sleeve 6344 is further sleeved on the gap between the second pressing shaft 6343 and the upper end of the pressing seat 6346, and the bolt 6341 is connected to the top end of the second pressing shaft 6343 through the nut 6342.

[0151] After adjusting to the appropriate pressure, tighten the adjusting screw sleeve 6344. A bolt 6341 and a nut 6342 are installed at the upper end of the second pressure shaft 6343. After adjusting the distance between the bolt 6341 and the lower end of the self-stop arm 615 to 1.2 mm, tighten the nut 6342. When the bolt 6341 contacts the self-stop arm 615, it indicates that there is a winding fault in the leather roller 6311. At this time, the controller will send a signal and stop automatically.

[0152] Thus, the roller pressure seat assembly 634 of the first roller, the second roller and the third roller is vertically installed in the cradle shell 61, and the pressure seat 6346 is equipped with an adjusting screw sleeve 6344, a pressure spring 6345, a second pressure shaft 6343 and an adjusting screw sleeve 6344 to adjust the pressure of the first roller, the second roller and the third roller.

[0153] Specifically, see Figure 1 、 Figure 23 As shown, the gas strut assembly 7 includes a rotary cylinder 71, a first connecting member 72, and a second connecting member 73. The first connecting member 72 and the second connecting member 73 are respectively connected to the ends of the rotary cylinder 71. In this embodiment, the first connecting member 72 is connected to the cradle base 3 via a fixed frame, and the second connecting member 73 is connected to the cradle housing 61. As a result, the rotary cylinder 71 drives the cradle housing 61 to swing.

[0154] The first connecting member 72 includes a first spring joint 721 and a first spring ball column 722, which are connected to each other. The first spring joint 721 is connected to the end of the rotating cylinder 71, and the first spring ball column 722 is connected to the cradle housing 61. The second connecting member 73 includes a second spring joint 731 and a second spring ball column 732. The first spring joint 721 is connected to the other end of the rotating cylinder 71, and the second spring ball column 732 is connected to the cradle housing 61.

[0155] Thus, the rotary cylinder 71 is mounted on the side of the cradle housing 61 via a hinged shaft at one end, and on the cradle seat 3 at the other end. When in operation, the pressure of the roller 6311 is adjusted to the specified pressure, and the cradle housing 61 is manually lowered. When the cradle in-position sensor 613 on the side detects a signal and the cradle pressure button is pressed, the left and right cradle pressure cylinders are activated simultaneously, and the two working arms rotate 90 degrees relative to each other and press down on the cradle housing 61. After the cradle is pressurized to the correct position, the cradle in-position sensor 613 is triggered, and the piston rods of the two guide roller dual-axis cylinders 621 of the guide roller 642 are simultaneously extended, pressurizing the guide roller 642 and immediately starting the speed increase operation.

[0156] Specifically, the drawing frame in the embodiment of the present invention includes a single-eye drawing frame and a double-eye drawing frame. Thus, the mixed pressure drafting mechanism can be applied to both single-eye drawing frames and double-eye drawing frames, and has a wide range of applications and high practicality.

[0157] The embodiment of the present application also provides a mixed pressurization control method for the drawing frame, which adopts the mixed pressurization drafting mechanism for the drawing frame, and the mixed pressurization control method comprises the following steps:

[0158] Step S 100 When it is detected that the creel shell 61 is placed in position, the controller controls the torsion cylinder assembly 4 to rotate a certain angle to press on the upper end of the creel shell 61, and the torsion cylinder assembly 4 pressurizes the creel shell 61.

[0159] Specifically, in the step S 100 When the main machine start button or the inching button is pressed, the PLC of the controller detects that the creel shell 61 is placed in position, the controller controls the torsion cylinder assembly 4 to rotate 90°, and the cylinder pressurization arm presses on the upper end of the left creel shell 611 and the right creel shell 612 to pressurize the left creel shell 611 and the right creel shell 612.

[0160] Step S 200 The controller controls the guide roller pressurization assembly 62 to work, the guide roller double-shaft cylinder 621 extends and drives the sleeve 623 to compress the second spring 624 to positively pressurize the guide roller assembly 64.

[0161] Specifically, in the step S 200 The controller controls the guide roller double-shaft cylinder 621 to extend, drives the sleeve 623 installed on the guide roller double-shaft cylinder 621, and pushes the sleeve 623 to compress the second spring 624 to positively pressurize the guide roller assembly 64, the combination of the guide roller double-shaft cylinder 621 and the second spring 624 realizes the normal pressurization of the guide roller 642, and the normal pressurization of the guide roller, the first roller, the second roller and the third roller is ensured.

[0162] Step S 300 The roller assembly 63 works to make the roller pressurization seat assembly 634 normally pressurize the first roller assembly 631, the second roller assembly 632 and the third roller assembly 633 respectively, the roller assembly 63 and the roller assembly 5 one-to-one form a fiber holding nip, and the fed sliver 9 is clamped and drafted.

[0163] Specifically, in the step S 300 In the working pressurization state, the guide roller assembly 64 is installed in the chute of the first roller seat 511, at this time, the roller 6311 and the roller one-to-one form a fiber holding nip to clamp and draft the fed sliver 9.

[0164] Step S 400When the drawing of the cotton sliver 9 needs to be stopped for completing the drawing, the controller controls the torsion cylinder assembly 4 to work for a period of time, and the torsion cylinder assembly 4 rotates for a certain angle to make the pressing rod 43 separate from the upper end surface of the cradle shell 61, at this time, the guide roller assembly 64 and the torsion cylinder assembly 4 are unloaded.

[0165] The above merely describes the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made under the concept of the present application, or direct / indirect application in other related technical fields by using the content of the present application specification and drawings is included in the patent protection scope of the present application.

Claims

1. A mixed pressure drafting mechanism for a drawing frame, characterized in that: The mixed pressurizing and drafting mechanism comprises: A roller base (1) having a rear pressure roller assembly (11) provided thereon; A front pressure roller seat structure (2) is arranged on the roller base (1), and the front pressure roller seat structure (2) and the rear pressure roller assembly (11) are close to each other to clamp the bell mouth (8); Cradle seats (3) are arranged on both sides of the roller base (1) in the width direction and are located on a side away from the front pressure roller seat structure (2); Roller assemblies (5) are arranged on both sides of the roller base (1) in a width direction and are connected to the cradle seat (3) in parallel; The roller assembly (5) comprises a first roller assembly (51), a second roller assembly (52), and a third roller assembly (53) connected in parallel to each other. The first roller assembly (51) comprises a first roller seat (511) and a first roller (512), wherein the two first roller seats (511) are arranged in parallel at both ends of the first roller (512), and the bottoms of the two first roller seats (511) are respectively installed on both sides of the width direction of the roller base (1); The leather roller hanging structure (6) comprises a cradle shell (61) arranged above the roller assembly (5), a guide leather roller pressure assembly (62) located in the cradle shell (61), a leather roller assembly (63) arranged parallel to the roller assembly (5) and spaced apart, and a guide leather roller assembly (64) pressing on both sides of the leather roller assembly (63); the guide leather roller pressure assembly (62) comprises a guide leather roller double-axis cylinder (621), a cylinder piston rod (622), a sleeve (623) connected to the bottom of the cylinder piston rod (622), a second spring ( 624) and a first pressure shaft (625), the cylinder piston rod (622) is installed in the guide roller double-axis cylinder (621) and is suitable for relative movement along the guide roller double-axis cylinder (621), the first pressure shaft (625) is connected to the center position of the cylinder piston rod (622) through the sleeve (623), and the sleeve (623) is further provided with a second spring (624) sleeved on the first pressure shaft (625), and the first pressure shaft (625) is suitable for positive pressure on the guide roller assembly (64); a torsion cylinder assembly (4) connected to the first roller seat (511), the torsion cylinder assembly (4) comprising a torsion cylinder seat (41) connected to the first roller seat (511), a torsion cylinder body (42) vertically mounted on the upper surface of the torsion cylinder seat (41), and a pressure rod (43) rotatably connected to the upper surface of the torsion cylinder body (42), the pressure rod (43) being adapted to rotate at a certain angle to pressurize or relieve pressure on the cradle shell (61), and a cradle position sensor (613) being further mounted on the side of the torsion cylinder body (42); A gas support assembly (7), one end of which is rotatably connected to the cradle seat (3) and the other end of which is rotatably connected to the cradle shell (61); A controller is provided, wherein the controller is adapted to control the guide roller pressure assembly (62) and the roller pressure seat assembly (634) to respectively apply positive pressure to the guide roller assembly (64) and the roller assembly (63) to adjust the fiber gripping jaws formed by the roller assembly and the roller assembly (5) in a one-to-one correspondence, thereby clamping and stretching the fed fiber.

2. The hybrid pressure drafting mechanism for a drawing frame according to claim 1, characterized in that: The second roller assembly (52) and the third roller assembly (53) both have the same structure as the first roller assembly (51).

3. The hybrid pressure drafting mechanism for a drawing frame according to claim 2, characterized in that: The front pressure roller seat structure (2) comprises a front pressure roller assembly (21), a manual pressure assembly (22), a sensing module assembly (23), a pressure roller bottom plate (24) and a rotating shaft seat (25). The front pressure roller assembly (21) includes a front pressure roller assembly (211) arranged horizontally and parallel to the rear pressure roller assembly (11) and a front pressure roller seat (212) connected to the rotating shaft seat (25); the front pressure roller assembly (211) is horizontally mounted on the front pressure roller seat (212); and the bottom of the front pressure roller seat (212) is connected to the pressure roller bottom plate (24) through the rotating shaft seat (25); The manual pressurizing assembly (22) comprises a pressurizing handle assembly (221), a handle seat (222) fixed on the press roller base plate (24), and a handle block (223) hinged on the handle seat (222); one end of the pressurizing handle assembly (221) is hinged between the handle seat (222) and the handle block (223), and the other end is rotatably connected to the front press roller seat (212); The sensing module assembly (23) is mounted on the pressure roller base plate (24) and is located between the front pressure roller seat (212) and the handle seat (222).

4. The hybrid pressure drafting mechanism for a drawing frame according to claim 3, characterized in that: The cradle housing (61) comprises a pair of symmetrically arranged left cradle housings (611) and right cradle housings (612), and the left cradle housing (611) and the right cradle housing (612) are both located directly above the roller assembly (5), and one end of each of the left cradle housing (611) and the right cradle housing (612) is rotatably connected to the inner side of the cradle seat (3), and the middle portions of the other ends of the left cradle housing (611) and the right cradle housing (612) are connected via the air support assembly (7); The two guide roller dual-axis cylinders (621) are respectively installed in the left cradle housing (611) and the right cradle housing (612); The guide roller assembly (64) includes a roller hanging plate (641) and a guide roller (642), one end of the roller hanging plate (641) is screwed onto the first pressure shaft (625), and the two ends of the guide roller (642) are respectively mounted on the lower side of the left cradle shell (611) and the right cradle shell (612) through the other end of the roller hanging plate (641).

5. The hybrid pressure drafting mechanism for a drawing frame according to claim 4, characterized in that: The leather roller assembly (63) comprises a first leather roller assembly (631), a second leather roller assembly (632), a third leather roller assembly (633) and a leather roller pressure seat assembly (634); the first leather roller assembly (631), the second leather roller assembly (632) and the third leather roller assembly (633) are mounted on the lower sides of the left cradle shell (611) and the right cradle shell (612) via the leather roller hanging plate (641).

6. The hybrid pressure drafting mechanism for a drawing frame according to claim 5, characterized in that: Each of the roller pressure seat components (634) includes a bolt (6341), a nut (6342), a second pressure shaft (6343), an adjusting screw sleeve (6344), a pressure spring (6345), a pressure seat (6346), a locking cover (6347) and a second screw (6348). The second pressure shaft (6343) is vertically arranged in a closed space formed by the pressure seat (6346) and the locking cover (6347), and extends out of the pressure seat (6346) at both ends. The locking cover (6347) is sealed at the bottom of the pressurizing seat (6346) through the second screw (6348); the pressurizing spring (6345) is sleeved on the second pressurizing shaft (6343) and located in the pressurizing seat (6346), and the gap between the second pressurizing shaft (6343) and the upper end of the pressurizing seat (6346) is also sleeved with the adjusting screw sleeve (6344), and the bolt (6341) passes through the nut (6342) and is connected to the top end of the second pressurizing shaft (6343).

7. The hybrid pressurizing and drafting mechanism for a drawing frame according to claim 5, characterized in that: The first leather roller assembly (631) comprises a leather roller (6311), a support seat structure (6312), and a spring clamping plate structure (6313), and both ends of the leather roller (6311) are connected to the spring clamping plate structure (6313) via the support seat structure (6312); The support seat structure (6312) comprises a support seat (63121), a double bearing (63122), a bearing retaining ring (63123), an axial baffle (63124), a first screw (63125) and a transition connecting shaft (63126); the double bearing (63122) is mounted on the leather roller (6311) via the bearing retaining ring (63123) and the axial baffle (63124); the support seat (63121) is sleeved on the outside of the double bearing (63122), the bearing retaining ring (63123) and the axial baffle (63124), and the support seat (63121) is fixed to the end face of the leather roller (6311) via the first screw (63125); and the spring clamping plate structure (6313) is fixed to the support seat (63121) via the transition connecting shaft (63126); The spring clamping plate structure (6313) includes a first hinge plate (63131), a second hinge plate (63132), a hinge shaft (63133) and a retaining spring (63134); the first hinge plate (63131) and the second hinge plate (63132) are connected via the hinge shaft (63133) and the retaining spring (63134); the first hinge plate (63131) is sleeved on the end of the transition connecting shaft (63126); and the second hinge plate (63132) is connected to the bottom of the leather roller pressure seat assembly (634).

8. The hybrid pressurizing and drafting mechanism for a drawing frame according to claim 7, characterized in that: The gas support assembly (7) comprises a rotary cylinder (71), a first connecting member (72) connected to the cradle seat (3), and a second connecting member (73) connected to the cradle shell (61), wherein the first connecting member (72) and the second connecting member (73) are respectively connected to two ends of the rotary cylinder (71) on their respective sides where they are close to each other.

9. A mixed pressure control method for a drawing frame, using the mixed pressure drafting mechanism for a drawing frame according to any one of claims 4 to 8, characterized in that: The mixed pressurization control method includes: Step S 100 : When it is detected that the cradle shell (61) is in place, the controller controls the torsion cylinder assembly (4) to rotate a certain angle to press on the upper end of the cradle shell (61), and the torsion cylinder assembly (4) pressurizes the cradle shell (61); Step S 200 : The controller controls the guide roller pressure assembly (62) to work, and the guide roller double-axis cylinder (621) extends and drives the sleeve (623) to compress the second spring (624) to positively pressurize the guide roller assembly (64); Step S 300 : The leather roller assembly (63) works so that the leather roller pressure seat assembly (634) applies normal pressure to the first leather roller assembly (631), the second leather roller assembly (632) and the third leather roller assembly (633), respectively. The leather roller assembly (63) corresponds to the roller assembly (5) one by one to form a fiber holding jaw, and clamps and stretches the fed cotton strip (9); Step S 400 When the traction of the cotton strip (9) is completed and the machine needs to be stopped, the controller controls the torsion cylinder assembly (4) to delay working for a period of time, and the torsion cylinder assembly (4) rotates a certain angle to allow the pressure rod (43) to separate from the upper end surface of the cradle shell (61). At this time, the guide roller assembly (64) and the torsion cylinder assembly (4) are depressurized.

Images