CN208562649U - A kind of double yarn back yarn hair down drafting systems - Google Patents

Abstract

The utility model provides a kind of double yarn back yarn hair down drafting systems, belongs to technical field of textile machine.It includes double spool gripping bodies, Yarn guide mechanism, first spool is mounted on the first back yarn bearing assembly, the lower section of the first back yarn bearing assembly is arranged in second back yarn bearing assembly, second spool is mounted on the second back yarn bearing assembly, the fixation yarn guiding ring of Yarn guide mechanism packet is mounted on the side of guide rack by fixed yarn guiding frame, movable yarn guide, which can slide up and down, to be arranged on guide rail, one end of crank is connected with oscillating motor, the other end of crank and one end of connecting rod are hinged, the other end of connecting rod and movable yarn guide are hinged, the upper drafting component and lower drafting component are symmetricly set on the two sides up and down of guide rack, the receipts yarn roller for receiving yarn component is rotatably provided in the first fulcrum bearing and the second fulcrum bearing, third spool, which is mounted on, to be received on yarn roller.The utility model not only realizes the synchronization guide to two spools, and hair down and drawing-off to yarn are realized during guide.

Description

A kind of double yarn back yarn hair down drafting systems

Technical field

The utility model relates to technical field of textile machine, in particular to a kind of double yarn back yarn hair down drafting systems.

Background technique

Many plant fibers twirl is spun into line or yarn by weaving loom together, these lines or yarn can be used to be made into cloth.Spinning packet It includes many steps: (1) cleaning, firstly the need of miscellaneous defect is removed in spinning process, i.e., preparatory processing is carried out to raw material, also referred to as spun The preparation of yarn raw material.(2) it loosens, fiber process that is disorderly and unsystematic, being laterally closely connected is arranged at longitudinal sequence, and has Necessarily required bright yarn needs to become bulk fibers single fiber state, releases lateral ties existing for fibrous raw material, Set up the vertical linkage of firm tandem array.(3) shredding, shredding are masses of fibres to be torn as fritter, small fibre bundle. (4) it combs, combing effect is that fiber fritter, tuftlet are further loosened into single shape by a large amount of intensive card wires on carding machine State, thus further perfect loosening for fiber.(5) combing, the combing effect of combing machine are the both ends using card wire to fiber The more careful combing under grip state is carried out respectively.(6) drawing-off draws and attenuates the strip attenuating after combing, progressivelyes reach pre- Determine thickness, this process is called drawing-off.(7) it twists, twisting is to be reversed yarn around itself axis, makes to be parallel to yarn Axial fiber in the shape of a spiral, makes interfibrous vertical linkage be fixed up to generate radial pressure.(8) wind, will half at Product or finished product are wound into certain form, in order to store, transport and the processing of next process, the process claim to wind.Always It, the effects of spinning process generally comprises raw material preparation, shredding, combing, removal of impurities, mixing, drawing-off and closes, twists and wind, Some effects are realized repeatedly by multiple.In spinning, usually because production needs, by two one threads from two spools In upper merging guide to other spool, but common feed carrier cannot achieve the synchronous clamping to two spools, two yarns Line is also easy to produce chaotic burr during guide, and it is even more impossible to the drawing-off to yarn is realized during guide.

Utility model content

The purpose of the utility model is to provide a kind of double yarn back yarn hair down drafting systems, not only realize to the same of two spools Guide is walked, and realizes hair down and drawing-off to yarn, structurally reasonable, good reliability during guide.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of double yarn back yarn hair down drafting systems, it includes double spool gripping bodies, Yarn guide mechanism, double spool clampings Mechanism is including on the first spool, the second spool, Π type rack, top guide bar, lower guide rod, upper locking nut, lower locking nut, first Ball sleeve sliding block, ball sleeve sliding block, the first lower ball sleeve sliding block, the second lower ball sleeve sliding block, left connection board, right connection on second Plate, left cylinder, left cylinder support, right cylinder, right cylinder support, left gripping finger, right gripping finger, attachment screw, the first back yarn bearing group Part, the second back yarn bearing assembly, left limit block, right limit block, left adjusting screw, right adjusting screw, the top guide bar are led under Bar is parallel to each other, and is horizontally arranged in Π type rack, and the top guide bar and lower guide rod pass through upper locking nut under respectively Locking nut locking, the left limit block and right limit block passes through left adjusting screw respectively and right adjusting screw is mounted on top guide bar The left and right sides, ball sleeve sliding block is all slidably arranged on top guide bar on ball sleeve sliding block and second on described first, described First lower ball sleeve sliding block, the second lower ball sleeve sliding block are all slidably arranged on lower guide rod, the left connection board connection first Upper ball sleeve sliding block and the first lower ball sleeve sliding block, the right connection board connect ball sleeve sliding block and the second lower ball sleeve on second Sliding block, the left cylinder support and right cylinder support are symmetrically mounted on the left and right sides of Π type rack, and the left cylinder includes a left side Cylinder body and left piston bar, the left cylinder are mounted on left cylinder support, and the right end of the left piston bar connects left connection board, institute Stating right cylinder includes right cylinder body and right piston bar, and the right cylinder body is mounted on right cylinder support, the left end of the right piston bar Right connection board is connected, the left gripping finger is mounted on the downside of the first lower ball sleeve sliding block by attachment screw, and the right gripping finger is logical The downside that attachment screw is mounted on the second lower ball sleeve sliding block is crossed, the first back yarn bearing assembly includes the first left support shaft, first Left conical bearing, the first right support shaft, the first right conical bearing, the first left support shaft are fixed on the inside of left gripping finger, institute It states the first left conical bearing to be rotatably provided in the first left support shaft, the first right support shaft is fixed on the interior of right gripping finger Side, the first right conical bearing are rotatably provided in the first right support shaft, the first left conical bearing and the first right cone Shape supports concentric setting, is both provided with fitting baffle on the first left conical bearing and the first right conical bearing, and described the One spool is mounted on the first back yarn bearing assembly, and the second back yarn bearing assembly is arranged under the first back yarn bearing assembly Side, the second back yarn bearing assembly include the second left support shaft, the second left conical bearing, the second right support shaft, the second right cone Shape bearing, the second left support shaft are fixed on the inside of left gripping finger, and the second left conical bearing is rotatably provided in second In left support shaft, the second right support shaft is fixed on the inside of right gripping finger, and the second right conical bearing is rotatably provided in In second right support shaft, the second left conical bearing and the second right concentric setting of conical bearing, the second left taper branch It holds and is both provided with fitting baffle on the second right conical bearing, second spool is mounted on the second back yarn bearing assembly, institute The front side that double spool gripping bodies are arranged in Yarn guide mechanism is stated, the Yarn guide mechanism includes guide rack, fixed yarn guiding ring, fixation Yarn guide, upper drafting component, lower drafting component, guide rail, movable yarn guide, movable yarn guiding ring, oscillating motor, crank, connecting rod, receipts Yarn component, the fixed yarn guiding ring are mounted on the side of guide rack by fixed yarn guiding frame, and the guide rail, which is vertically installed at, leads The other side of yarn rack, the activity yarn guide, which can slide up and down, to be arranged on guide rail, and the oscillating motor is mounted on guide rail One end of upside, the crank is connected with oscillating motor, and the other end of the crank and one end of connecting rod are hinged, the connecting rod The other end and movable yarn guide are hinged, and the upper drafting component and lower drafting component are symmetricly set on up and down the two of guide rack Side, the upper drafting component include draw roll on first, draw roll on second, draw roll, upper drawing-off item in third, and described first Upper draw roll, draw roll on second, draw roll is triangular in shape in third, and is all rotatably provided in the upside of guide rack, The upper drawing-off item is circumferentially positioned at draw roll on first, draw roll on second, in third in draw roll, the lower drafting component Including draw roll, lower drawing-off item under the first lower draw roll, the second lower draw roll, third, led under the described first lower draw roll, second It is triangular in shape to stretch draw roll under roller, third, and is all rotatably provided in the downside of guide rack, the lower drawing-off item surround and sets It sets under first under draw roll, second under draw roll, third in draw roll, before movable yarn guiding ring is arranged in the receipts yarn component Side, the receipts yarn component include receiving yarn rack, receiving yarn roller, third spool, the first fulcrum bearing, the second fulcrum bearing, first pulley, the Two belt wheels, belt receive yarn motor, motor support base, and first fulcrum bearing and the second fulcrum bearing are fixed on the two sides for receiving yarn rack, The receipts yarn roller is rotatably provided in the first fulcrum bearing and the second fulcrum bearing, and the third spool, which is mounted on, to be received on yarn roller, institute It states the second belt wheel to be coaxially mounted to receive the side of yarn roller, the first pulley is connected with yarn motor coaxle is received, the first pulley It is connected with the second belt wheel by belt, the receipts yarn motor is mounted on motor support base, and the motor support base, which is fixed on, receives yarn machine On frame.

Further, top guide bar spacing head and lower guide rod spacing head are respectively arranged on the top guide bar and lower guide rod.

Further, reinforcing rib is both provided in the left gripping finger and right gripping finger.

Further, rolling bearing is provided between the receipts yarn roller and the first fulcrum bearing, the second fulcrum bearing.

Compared to the prior art the utility model, has the following advantages that and effect: left cylinder and right cylinder synchronization action, left Cylinder and right cylinder pass through left connection board respectively and right connection board drives left gripping finger and right gripping finger to draw close, the first back yarn bearing assembly The bearing to the first spool and the second spool is realized with the second back yarn bearing assembly, ensure that the first spool and the second spool are steady Back yarn.Receive yarn motor and driven by first pulley, belt and the second belt wheel and receive yarn roller smooth rotation, yarn on the first spool and Yarn on second spool successively passes through between fixed yarn guiding ring, upper drafting component and lower drafting component, movable yarn guiding ring is uniform On third spool.Since there are speed difference, upper drafting component and lower drafting components for upper drafting component and lower drafting component Realize the hair down and drawing-off to yarn.Oscillating motor movement, is pumped by crank and connecting rod drive activity yarn guide, Movable yarn guiding ring ensure that Yarn homogeneous guide.Top guide bar spacing head and lower guide rod limit are respectively arranged on top guide bar and lower guide rod Potential head avoids top guide bar and lower guide rod play, ensure that the stationarity of top guide bar and lower guide rod.Left limit block and right limit block are real Now to the limit of ball sleeve sliding block on ball sleeve sliding block and second on first, when the first spool and the second spool model change, Left adjusting screw and right adjusting screw can be unscrewed, realize the adjustment to left limit block and right limit block position, strong applicability.This Utility model not only realizes the synchronization guide to two spools, and hair down and drawing-off to yarn are realized during guide, It is structurally reasonable, good reliability.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the side view of the utility model.

In figure: 1. pairs of spool gripping bodies, 2. Yarn guide mechanisms, 3. first spools, 4. second spools, 5. Π type racks, 6. Top guide bar, 7. lower guide rods, 8. upper locking nuts, 9. lower locking nuts, ball sleeve sliding block on 10. first, ball sleeve on 11. second Sliding block, 12. first lower ball sleeve sliding blocks, 13. second lower ball sleeve sliding blocks, 14. left connection boards, 15. right connection boards, 16. left gas Cylinder, 17. left cylinder supports, 18. right cylinders, 19. right cylinder supports, 20. left gripping fingers, 21. right gripping fingers, 22. attachment screws, 23. First back yarn bearing assembly, 24. second back yarn bearing assemblies, 25. left limit blocks, 26. right limit blocks, 27. left adjusting screws, 28. right adjusting screw, 29. left cylinders, 30. left piston bars, 31. right cylinder bodies, 32. right piston bars, 33. first left support shafts, 34. First left conical bearing, 35. first right support shafts, 36. first right conical bearings, 37. fitting baffles, 38. second left support shafts, 39. the second left conical bearing, 40. second right support shafts, 41. second right conical bearings, 42. guide racks, 43. fixed guides Ring, 44. fixed yarn guiding frames, drafting component on 45., 46. lower drafting components, 47. guide rails, 48. movable yarn guides, 49. activities are led Yarn ring, 50. oscillating motors, 51. cranks, 52. connecting rods, 53. receive yarn components, draw roll on 54. first, draw roll on 55. second, 56. draw roll in third, drawing-off item on 57., 58. first lower draw rolls, 59. second lower draw rolls, draw roll under 60. thirds, 61. lower drawing-off item, 62. receipts yarn racks, 63. receipts yarn rollers, 64. third spools, 65. first fulcrum bearings, 66. second fulcrum bearings, 67. First pulley, 68. second belt wheels, 69. belts, 70. receive yarn motors, 71. motor support bases, and 72. top guide bar spacing heads are led under 73. Bar spacing head, 74. reinforcing ribs, 75. rolling bearings.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair The explanation of the utility model and the utility model is not limited to following embodiment.

As depicted in figs. 1 and 2, a kind of double yarn back yarn hair down drafting systems, it includes double spool gripping bodies 1, guide machine Structure 2, double spool gripping bodies 1 include the first spool 3, the second spool 4, Π type rack 5, top guide bar 6, lower guide rod 7, locking The lower ball sleeve sliding block 12 of ball sleeve sliding block 11, first on ball sleeve sliding block 10, second on tight nut 8, lower locking nut 9, first, Second lower ball sleeve sliding block 13, left connection board 14, right connection board 15, left cylinder 16, left cylinder support 17, right cylinder 18, right gas Cylinder support 19, left gripping finger 20, right gripping finger 21, attachment screw 22, the first back yarn bearing assembly 23, the second back yarn bearing assembly 24, Left limit block 25, right limit block 26, left adjusting screw 27, right adjusting screw 28, the top guide bar 6 and lower guide rod 7 are parallel to each other, And it is horizontally arranged in Π type rack 5, the top guide bar 6 and lower guide rod 7 pass through upper locking nut 8 and lower locking nut respectively 9 lock, and are respectively arranged with top guide bar spacing head 72 and lower guide rod spacing head 73 on the top guide bar 6 and lower guide rod 7, avoid leading 7 play of bar 6 and lower guide rod, ensure that the stationarity of top guide bar 6 and lower guide rod 7.The left limit block 25 and right limit block 26 divide It left Tong Guo not adjust screw 27 and the right left and right sides for adjusting screw 28 and being mounted on top guide bar 6, ball sleeve sliding block on described first Ball sleeve sliding block 11 is all slidably arranged on top guide bar 6 on 10 and second, and the described first lower ball sleeve sliding block 12, second is lower to be rolled Bead sleeve sliding block 13 is all slidably arranged on lower guide rod 7, ball sleeve sliding block 10 and first in the connection of left connection board 14 first Lower ball sleeve sliding block 12, the right connection board 15 connects ball sleeve sliding block 11 and the second lower ball sleeve sliding block 13 on second, described Left cylinder support 17 and right cylinder support 19 are symmetrically mounted on the left and right sides of Π type rack 5, and the left cylinder 16 includes left cylinder Body 29 and left piston bar 30, the left cylinder 29 are mounted on left cylinder support 17, and the right end of the left piston bar 30 connects left Connecting plate 14, the right cylinder 18 include right cylinder body 31 and right piston bar 32, and the right cylinder body 31 is mounted on right cylinder support 19 On, the left end of the right piston bar 32 connects right connection board 15, and the left gripping finger 20 is mounted under first by attachment screw 22 The downside of ball sleeve sliding block 12, the downside of ball sleeve sliding block 13 under the right gripping finger 21 is mounted on second by attachment screw 22, It is both provided with reinforcing rib 74 in the left gripping finger 20 and right gripping finger 21, it is good strong to ensure that left gripping finger 20 and right gripping finger 21 have Degree.First back yarn bearing assembly 23 includes the first left support shaft 33, the first left conical bearing 34, the first right support shaft 35, first Right conical bearing 36, the first left support shaft 33 are fixed on the inside of left gripping finger 20, and the first left conical bearing 34 can turn Dynamic to be arranged in the first left support shaft 33, the first right support shaft 35 is fixed on the inside of right gripping finger 21, the first right cone Shape bearing 36 is rotatably provided in the first right support shaft 35, and the first left conical bearing 34 and the first right conical bearing 36 are same Axle center is arranged, and is both provided on the first left conical bearing 34 and the first right conical bearing 36 and is bonded baffle 37, and described first Spool 3 is mounted on the first back yarn bearing assembly 23, and the second back yarn bearing assembly 24 is arranged in the first back yarn bearing assembly 23 lower section, the second back yarn bearing assembly 24 include the second left support shaft 38, the second left conical bearing 39, the second right bearing Axis 40, the second right conical bearing 41, the second left support shaft 38 are fixed on the inside of left gripping finger 20, the second left taper branch It holds 39 to be rotatably provided in the second left support shaft 38, the second right support shaft 40 is fixed on the inside of right gripping finger 21, described Second right conical bearing 41 is rotatably provided in the second right support shaft 40, the second left conical bearing 39 and the second right taper 41 concentric settings are supported, fitting baffle 37 is both provided on the second left conical bearing 39 and the second right conical bearing 41, Fitting baffle 37 ensure that the stability of spool back yarn.Second spool 4 is mounted on the second back yarn bearing assembly 24, described The front side of double spool gripping bodies 1 is arranged in Yarn guide mechanism 2, and the Yarn guide mechanism 2 includes guide rack 42, fixed yarn guiding ring 43, fixed yarn guiding frame 44, upper drafting component 45, lower drafting component 46, guide rail 47, movable yarn guide 48, movable yarn guiding ring 49, pendulum Dynamic motor 50, connecting rod 52, receives yarn component 53 at crank 51, and the fixed yarn guiding ring 43 is mounted on guide by fixed yarn guiding frame 44 The side of rack 42, the guide rail 47 are vertically installed at the other side of guide rack 42, and the activity yarn guide 48 can go up downslide Dynamic to be arranged on guide rail 47, the oscillating motor 50 is mounted on the upside of guide rail 47, one end of the crank 51 and oscillating motor 50 connections, the other end of the crank 51 and one end of connecting rod 52 are hinged, the other end of the connecting rod 52 and movable yarn guide 49 Hingedly, the upper drafting component 45 and lower drafting component 46 are symmetricly set on the two sides up and down of guide rack 42, the upper drawing-off Component 45 includes draw roll 55 in draw roll 54, second on first, draw roll 56, upper drawing-off item 57 in third, on described first Draw roll 55 in draw roll 54, second, draw roll 56 is triangular in shape in third, and is all rotatably provided in guide rack 42 Upside, the upper drawing-off item 57 is circumferentially positioned on first draw roll 55 in draw roll 54, second, in third in draw roll 56, The lower drafting component 46 includes draw roll 60, lower drawing-off item 61 under the first lower draw roll 58, second lower draw roll 59, third, Draw roll 60 is triangular in shape under described first lower draw roll 58, second lower draw roll 59, third, and is all rotatably provided in and leads The downside of yarn rack 42, the lower drawing-off item 61 are circumferentially positioned under the first lower draw roll 58, second lower draw roll 59, third and lead Stretch on roller 60, the yarn component 53 of receiving is arranged in the front side of movable yarn guiding ring 49, the receipts yarn component 53 include receipts yarn rack 62, It receives yarn roller 63, third spool 64, the first fulcrum bearing 65, the second fulcrum bearing 66, first pulley 67, the second belt wheel 68, belt 69, receive Yarn motor 70, motor support base 71, first fulcrum bearing 65 and the second fulcrum bearing 66 are fixed on the two sides for receiving yarn rack 62, described Yarn roller 63 is received to be rotatably provided in the first fulcrum bearing 65 and the second fulcrum bearing 66, the receipts yarn roller 63 and the first fulcrum bearing 65, It is provided with rolling bearing 75 between second fulcrum bearing 66, ensure that and receive 63 smooth rotation of yarn roller.The third spool 64 is mounted on It receives on yarn roller 63, second belt wheel 68 is coaxially mounted to receive the side of yarn roller 63, the first pulley 67 and receipts yarn motor 70 Coaxially connected, the first pulley 67 and the second belt wheel 68 are connected by belt 69, and the receipts yarn motor 70 is mounted on motor branch On seat 71, the motor support base 71, which is fixed on, to be received in yarn rack 62.

Through the above technical solutions, a kind of double yarn back yarn hair down drafting systems of the utility model are in use, 16 He of left cylinder 18 synchronization action of right cylinder, left cylinder 16 and right cylinder 18 drive left gripping finger 20 by left connection board 14 and right connection board 15 respectively It is drawn close with right gripping finger 21, the first back yarn bearing assembly 23 and the second back yarn bearing assembly 24 are realized to the first spool 3 and the second yarn The bearing of pipe 4 ensure that the first spool 3 and the steady back yarn of the second spool 4.It receives yarn motor 70 and passes through first pulley 67, belt 69 It is driven with the second belt wheel 68 and receives 63 smooth rotation of yarn roller, the yarn on yarn and the second spool 4 on the first spool 3 successively passes through It fixes between yarn guiding ring 43, upper drafting component 45 and lower drafting component 46, movable yarn guiding ring 49 is uniformly wound on third spool 64 On.Since there are speed difference, upper drafting component 45 and the realizations pair of lower drafting component 46 for upper drafting component 45 and lower drafting component 46 The hair down and drawing-off of yarn.Oscillating motor 50 acts, and is up and down reciprocatingly transported by crank 51 and 52 drive activity yarn guide 48 of connecting rod Dynamic, movable yarn guiding ring 49 ensure that Yarn homogeneous guide.Left limit block 25 and right limit block 26 are realized sliding to ball sleeve on first The limit of ball sleeve sliding block 11 on block 10 and second can unscrew left tune when the first spool 3 and the second 4 model change of spool Screw 27 and right adjusting screw 28 are saved, realizes the adjustment to 26 position of left limit block 25 and right limit block, strong applicability.This is practical The novel synchronization guide not only realized to two spools, and hair down and drawing-off of the realization to yarn during guide, structure Rationally, good reliability.

Above content is only illustrate to examples for clearly illustrating the present invention described in this specification.The utility model Person of ordinary skill in the field can make various modifications or additions to the described embodiments or using class As mode substitute, content without departing from the utility model specification or surmount model defined in the claims It encloses, all should belong to the protection range of the utility model.

Claims (4)

1. a kind of double yarn back yarn hair down drafting systems, it is characterised in that: it includes double spool gripping bodies, Yarn guide mechanism, described Double spool gripping bodies include the first spool, the second spool, Π type rack, top guide bar, lower guide rod, upper locking nut, lower locking Nut, ball sleeve sliding block on first, ball sleeve sliding block, the first lower ball sleeve sliding block, the second lower ball sleeve sliding block, Zuo Lian on second Fishplate bar, right connection board, left cylinder, left cylinder support, right cylinder, right cylinder support, left gripping finger, right gripping finger, attachment screw, first Back yarn bearing assembly, the second back yarn bearing assembly, left limit block, right limit block, left adjusting screw, right adjusting screw, it is described on Guide rod and lower guide rod are parallel to each other, and are horizontally arranged in Π type rack, and the top guide bar and lower guide rod pass through locking respectively Tight nut and lower locking nut locking, the left limit block and right limit block pass through left adjusting screw and right adjusting screw peace respectively Mounted in the left and right sides of top guide bar, on described first on ball sleeve sliding block and second ball sleeve sliding block be all slidably arranged on lead On bar, the described first lower ball sleeve sliding block, the second lower ball sleeve sliding block are all slidably arranged on lower guide rod, the left connection board Ball sleeve sliding block and the first lower ball sleeve sliding block, the right connection board connect ball sleeve sliding block and second on second in connection first Lower ball sleeve sliding block, the left cylinder support and right cylinder support are symmetrically mounted on the left and right sides of Π type rack, the left gas Cylinder includes left cylinder and left piston bar, and the left cylinder is mounted on left cylinder support, and the right end of the left piston bar connects left Connecting plate, the right cylinder include right cylinder body and right piston bar, and the right cylinder body is mounted on right cylinder support, the right piston The left end of bar connects right connection board, and the left gripping finger is mounted on the downside of the first lower ball sleeve sliding block by attachment screw, described Right gripping finger is mounted on the downside of the second lower ball sleeve sliding block by attachment screw, and the first back yarn bearing assembly includes the first left bearing Axis, the first left conical bearing, the first right support shaft, the first right conical bearing, the first left support shaft are fixed on left gripping finger Inside, the first left conical bearing are rotatably provided in the first left support shaft, and the first right support shaft is fixed on right folder The inside of finger, the first right conical bearing are rotatably provided in the first right support shaft, the first left conical bearing and The one right concentric setting of conical bearing is both provided with fitting baffle on the first left conical bearing and the first right conical bearing, First spool is mounted on the first back yarn bearing assembly, and the second back yarn bearing assembly is arranged in the first back yarn bearing group The lower section of part, the second back yarn bearing assembly include the second left support shaft, the second left conical bearing, the second right support shaft, the Two right conical bearings, the second left support shaft are fixed on the inside of left gripping finger, and the second left conical bearing is rotatably arranged In the second left support shaft, the second right support shaft is fixed on the inside of right gripping finger, and the second right conical bearing can be rotated It is arranged in the second right support shaft, the second left conical bearing and the second right concentric setting of conical bearing, described second is left Fitting baffle is both provided on conical bearing and the second right conical bearing, second spool is mounted on the second back yarn bearing assembly On, the front side of double spool gripping bodies is arranged in the Yarn guide mechanism, and the Yarn guide mechanism includes guide rack, fixed guide Ring, fixed yarn guiding frame, upper drafting component, lower drafting component, guide rail, movable yarn guide, movable yarn guiding ring, oscillating motor, crank, Connecting rod receives yarn component, and the fixed yarn guiding ring is mounted on the side of guide rack by fixed yarn guiding frame, and the guide rail is pacified vertically Mounted in the other side of guide rack, the activity yarn guide, which can slide up and down, to be arranged on guide rail, and the oscillating motor is mounted on One end of the upside of guide rail, the crank is connected with oscillating motor, and the other end of the crank and one end of connecting rod are hinged, described The other end of connecting rod and movable yarn guide are hinged, and the upper drafting component and lower drafting component are symmetricly set on the upper of guide rack Lower two sides, the upper drafting component include draw roll on first, draw roll on second, draw roll, upper drawing-off item in third, described Draw roll on first, draw roll on second, draw roll is triangular in shape in third, and is all rotatably provided in the upper of guide rack Side, the upper drawing-off item is circumferentially positioned at draw roll on first, draw roll on second, in third in draw roll, the lower drawing-off Component includes draw roll, lower drawing-off item under the first lower draw roll, the second lower draw roll, third, the described first lower draw roll, second Draw roll is triangular in shape under lower draw roll, third, and is all rotatably provided in the downside of guide rack, the lower drawing-off ring Around setting under the first lower draw roll, second under draw roll, third in draw roll, the receipts yarn component setting is in movable yarn guiding ring Front side, the receipts yarn component include receive yarn rack, receive yarn roller, third spool, the first fulcrum bearing, the second fulcrum bearing, first band Wheel, the second belt wheel, belt receive yarn motor, motor support base, and first fulcrum bearing and the second fulcrum bearing, which are fixed on, receives yarn rack Two sides, the receipts yarn roller are rotatably provided in the first fulcrum bearing and the second fulcrum bearing, and the third spool, which is mounted on, receives yarn roller On, second belt wheel is coaxially mounted to receive the side of yarn roller, and the first pulley is connected with yarn motor coaxle is received, and described first Belt wheel and the second belt wheel are connected by belt, and the receipts yarn motor is mounted on motor support base, and the motor support base is fixed on receipts In yarn rack.

2. a kind of double yarn back yarn hair down drafting systems according to claim 1, it is characterised in that: the top guide bar is led under Top guide bar spacing head and lower guide rod spacing head are respectively arranged on bar.

3. a kind of double yarn back yarn hair down drafting systems according to claim 1, it is characterised in that: the left gripping finger and right folder Reinforcing rib is both provided on finger.

4. a kind of double yarn back yarn hair down drafting systems according to claim 1, it is characterised in that: the receipts yarn roller and first Rolling bearing is provided between fulcrum bearing, the second fulcrum bearing.