CN113699652B

CN113699652B - Weft insertion system

Info

Publication number: CN113699652B
Application number: CN202111041265.2A
Authority: CN
Inventors: 匡延华; 秦鑫; 史正倩; 林富生; 宋志峰; 刘泠杉
Original assignee: Wuhan Textile University
Current assignee: Jiaxing Xiongcai Intelligent Machinery Technology Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-08-23
Anticipated expiration: 2041-09-07
Also published as: CN113699652A

Abstract

The invention discloses a weft insertion system, which comprises a base, a weft insertion shuttle mechanism and a driving mechanism, wherein the upper end surface of the base is provided with a through hole, and the through hole is used for accommodating a core mould and a beating-up device; the weft insertion shuttle mechanism comprises a shuttle structure movably mounted to the base along the circumferential direction of the base, the shuttle structure is positioned on the side wall of the through hole, and the shuttle structure is used for pulling weft yarns so as to enable the weft yarns to be wound on the outer sides of the plurality of warp yarns; the driving mechanism comprises a plurality of ratchet structures and a plurality of ratchet bars, the ratchet structures are arranged at intervals along the circumferential direction of the base, each ratchet structure is rotatably installed on the upper end face of the base along an axis extending up and down, the ratchet bars are fixedly installed at the lower end of the shuttle structure, and the ratchet bars can be selectively meshed with at least one ratchet structure to drive the shuttle structure to rotate; the weft yarn tensioning mechanism is arranged on the base and corresponds to one ratchet wheel structure, and is used for tensioning the weft yarns led out by the shuttle structure so as to enable the weft yarns to drive the warp yarns to be attached to the outer wall surface of the core mold.

Description

Weft insertion system

Technical Field

The invention relates to the technical field of textile equipment, in particular to a weft insertion system.

Background

The multilayer three-dimensional cylindrical composite fabric is widely applied to various fields due to the excellent mechanical property and the light weight. The automation of multilayer cylindrical three-dimensional weaving machines has been realized, and the automatic weft insertion mechanism and warp tension control of the three-dimensional cylindrical weaving machine are always technical problems. Although the existing cylindrical weaving machine capable of weaving various thickness requirements can efficiently finish weaving, the weft insertion mechanism of the existing cylindrical weaving machine has the phenomena of top teeth and clamping teeth, so that the integral weaving efficiency of the weaving machine is influenced, and the woven fabric with small tension provided by weft yarns can cause that warp yarns are not completely close to a core mold, so that the weaving performance of the cylindrical fabric is directly influenced.

Disclosure of Invention

The invention mainly aims to provide a weft insertion system, which aims to solve the defects and problems of instability of a weft insertion mechanism and poor weaving effect in the conventional weft insertion equipment.

In order to achieve the above object, the present invention provides a weft insertion system for winding weft on the outer surface of warp and attaching the weft to the outer wall surface of a core mold, comprising:

the upper end surface of the base is provided with a through hole which is used for accommodating a core mold and a beating-up device;

the weft insertion shuttle mechanism comprises a shuttle structure movably mounted to the base along the circumferential direction of the base, the shuttle structure is positioned on the side of the through hole, and the shuttle structure is used for drawing weft yarns so that the weft yarns are wound on the outer sides of the warp yarns;

the driving mechanism comprises a ratchet bar and a plurality of ratchet structures, the ratchet structures are arranged at intervals along the circumferential direction of the base, each ratchet structure is rotatably installed on the upper end face of the base along an axis extending in the vertical direction, the ratchet bar is fixedly installed at the lower end of the shuttle structure, and the ratchet bar can be selectively meshed with at least one ratchet structure to drive the shuttle structure to rotate; and (c) a second step of,

and the weft yarn tensioning mechanism is arranged on the base and corresponds to one ratchet wheel structure, and is used for tensioning the weft yarn led out by the shuttle structure so that the weft yarn drives the warp yarn to be attached to the outer wall surface of the core mold.

Optionally, the drive mechanism further comprises:

the fixing plates are arranged at intervals along the circumferential direction of the base and are positioned on the circumferential side of the through hole, and an accommodating space is formed between each fixing plate and the base and used for installing the corresponding ratchet wheel structure; and the number of the first and second groups,

the driving motors are correspondingly arranged on the fixing plates, each driving motor is provided with a driving shaft extending along the vertical direction, and each driving shaft penetrates through the corresponding fixing plate to extend into the accommodating space so as to be fixedly connected with the middle part of the corresponding ratchet wheel structure;

the ratchet structures at least partially protrude out of the side end, facing the through hole, of the fixing plate.

Optionally, each of the ratchet structures comprises:

the side surface of the supporting disc is provided with a plurality of mounting grooves which are uniformly distributed along the circumferential direction, and the middle part of the supporting disc is provided with a through hole in a penetrating manner;

the movable ejector rods are movably arranged in the mounting grooves respectively, and at least part of each movable ejector rod protrudes out of the supporting disc to be correspondingly meshed with the ratchet; and the number of the first and second groups,

the compression springs are arranged in the mounting grooves, and two ends of each compression spring are respectively abutted against the inner wall surfaces of the movable ejector rod and the mounting groove;

and each driving shaft extends into the through hole to be fixedly connected with the supporting disc.

Optionally, in each ratchet structure, a stop protrusion is arranged on the outer surface of the movable ejector rod;

the notch of the mounting groove is correspondingly provided with a limiting bulge, and the limiting bulge is abutted against the stopping bulge to limit the movable stroke of the movable ejector rod in the direction back to the via hole.

Optionally, the driving mechanism further includes a plurality of guiding structures disposed corresponding to the plurality of fixing plates, each of the guiding structures includes:

the two guide wheels are arranged at the side end, facing the through hole, of the fixing plate, are rotatably arranged along the axis extending in the vertical direction and are arranged at intervals along the length direction of the fixing plate, and first annular grooves are formed in the outer side surfaces of the two guide wheels;

the supporting wheel is rotatably arranged on the upper end face of the base along an axis extending in the vertical direction, the supporting wheel is positioned between the two guide wheels and is positioned on one side of the two guide wheels, which faces the through hole, and a second annular groove is formed in the outer surface of the supporting wheel; and the number of the first and second groups,

the arc-shaped plate is fixedly installed on the lower end face of the ratchet strip, and the arc-shaped plate is respectively installed in the two first annular grooves and the second annular grooves in a sliding mode along the two radial ends of the through hole;

wherein, the part of the ratchet wheel structure protruding out of the fixed plate is positioned between the two guide wheels.

Optionally, each fixing plate is provided with a magnetic induction position control sensor;

and magnets are arranged on the ratchets to be respectively in electromagnetic fit with the magnetic induction position control sensors.

Optionally, the shuttle structure comprises:

the support comprises two connecting arms, the upper ends of the two connecting arms are connected, and the lower ends of the two connecting arms are arranged on the upper end surface of the ratchet bar at intervals;

the first cross rod is positioned between the two connecting arms; and the number of the first and second groups,

the plurality of the wire guiding rings comprise a first wire guiding ring and a second wire guiding ring, the first wire guiding ring is arranged in the middle of the first cross rod, and the second wire guiding ring is arranged at the joint of the two connecting arms and used for enabling weft yarns to sequentially penetrate through the first wire guiding ring and the second wire guiding ring to be connected onto the core mold.

Optionally, the shuttle structure further comprises:

the second cross rod is positioned between the two connecting arms and above the first cross rod, and the middle part of the second cross rod is provided with the wire guide ring;

the third cross rod is positioned between the two connecting arms and above the second cross rod, and two wire guiding rings are arranged on the third cross rod at intervals;

the guide rod extends along the vertical direction, two ends of the guide rod are respectively and fixedly connected with the second cross rod and the third cross rod, and a movable wire guide ring is sleeved on the outer surface of the guide rod; and (c) a second step of,

the two first springs are sleeved on the outer surface of the guide rod and are respectively positioned on the upper side and the lower side of the movable wire ring;

the weft yarn sequentially passes through the first guide ring, the guide ring on the second cross bar, one of the guide rings on the third cross bar, the movable guide ring, the other guide ring on the third cross bar and the second guide ring to be connected to the core mold.

Optionally, in the two first springs, an elastic coefficient of the first spring located below the movable wire loop is smaller than an elastic coefficient of the first spring located above the movable wire loop.

Optionally, the weft insertion shuttle mechanism further comprises a yarn bobbin fixing seat, the yarn bobbin fixing seat is fixedly installed on the ratchet strip and located between the two connecting arms, a rotating shaft which is rotatably installed along the length direction of the ratchet strip is arranged on the yarn bobbin fixing seat, and the rotating shaft is used for sleeving and installing the yarn bobbin.

Optionally, one end of the rotating shaft protrudes out of the bobbin fixing seat;

the weft insertion shuttle mechanism further comprises a pre-tightening assembly, and the pre-tightening assembly comprises:

the supporting seat is fixedly connected with the side end of the yarn drum fixing seat and is positioned below the part, protruding out of the yarn drum fixing seat, of the rotating shaft;

the friction block is positioned between the yarn drum fixing seat and the rotating shaft, the upper end face of the friction block is abutted to the part, protruding out of the yarn drum fixing seat, of the rotating shaft, and a groove is formed in the lower end face of the friction block; and the number of the first and second groups,

and the second spring is arranged in the groove and respectively propped against the supporting seat and the upper wall surface of the groove.

Optionally, the weft yarn tensioning mechanism comprises:

a mounting seat;

the clamping assembly comprises a clamping structure, the clamping structure is movably arranged on the mounting seat along a first direction, and the clamping structure is used for clamping the lower part of weft; and the number of the first and second groups,

the stay wire assembly comprises at least one stay wire rod positioned above the wire clamping structure, the stay wire rod is arranged on the mounting seat, can move along a first direction and a second direction relative to the mounting seat, and is used for hooking the upper part of the weft yarn and pulling the weft yarn to be tightened after the lower part of the weft yarn is fixed by the wire clamping structure;

wherein the first direction and the second direction are staggered in a horizontal plane.

Optionally, the pull wire assembly further comprises:

the first seat plate is movably arranged on the mounting seat along a first direction; and (c) a second step of,

the mounting block is fixedly mounted on the upper end face of the first seat plate, and a wire accommodating groove is formed in the end face, deviating from the first pneumatic clamping jaw, of the mounting block and used for accommodating weft yarns;

the first pull rod is movably mounted on the first base plate along the second direction and corresponds to the notch of the wire accommodating groove to shield or open the notch of the wire accommodating groove.

Optionally, two opposite side surfaces of the mounting block along the second direction are respectively provided with a communication hole in a penetrating manner, and both the communication holes are communicated with the wire accommodating groove;

the pull rod is equipped with two, two the pull rod wears to locate two respectively in the intercommunication hole, two the pull rod butt is in order to shelter from jointly the notch of holding the wire casing.

Optionally, the wire pulling assembly further comprises a wire pulling rod driving structure, the wire pulling rod driving structure comprising:

the first pneumatic clamping jaw is fixedly arranged on the upper end face of the first seat plate and provided with two first clamping arms, and the two first clamping arms have movable strokes which are close to or far away from each other along a second direction; and the number of the first and second groups,

the two connecting rods extend along a first direction, one ends of the two connecting rods are fixedly connected with the two first clamping arms respectively, and the two wire drawing rods are fixedly installed on the opposite side faces of the other ends of the two connecting rods respectively.

Optionally, the wire drawing assembly further comprises a first limiting structure, the first limiting structure comprises a first protrusion and a first groove which are matched with each other, and the first protrusion and the first groove are respectively arranged on the two opposite end surfaces of the wire drawing rod.

Optionally, the wire drawing assembly further comprises a wire catcher, the wire catcher comprises two wire guiding rods arranged at intervals along a second direction, one ends of the two wire guiding rods are fixedly mounted to the lower end face of the mounting block and are arranged corresponding to the wire accommodating groove, the other ends of the two wire guiding rods extend towards the direction deviating from the wire accommodating groove, the distance between the two wire guiding rods gradually increases towards the direction deviating from the wire accommodating groove, and the two wire guiding rods are used for being selectively contacted with weft yarns and guiding the weft yarns into the wire accommodating groove along with the movement of the first seat plate.

Optionally, the wire clamping structure comprises:

the second seat plate extends along the vertical direction and is movably arranged on the mounting seat along the first direction;

the second pneumatic clamping jaw is fixedly mounted on the second seat plate and provided with two second clamping arms, and the two second clamping arms have movable strokes which are close to or far away from each other along a second direction; and the number of the first and second groups,

and the two clamping plates are respectively and fixedly installed on the two second clamping arms, and the two clamping plates are abutted to clamp the lower part of the weft yarn together.

Optionally, the wire clamping assembly further comprises a second limiting structure, the second limiting structure comprises a second protrusion and a second groove which are matched with each other, the second protrusion and the second groove both extend along the first direction, and the second protrusion and the second groove are respectively arranged on two end faces of the clamping plate, which are opposite to each other.

Optionally, the weft tensioning mechanism further comprises a guide plate, the guide plate is fixedly mounted at the upper end of the mounting seat, a sliding groove extending along a first direction is formed in the middle of the upper end face of the guide plate, wherein:

the wire drawing assembly further comprises a first seat plate, the wire drawing rod is movably mounted on the first seat plate, a sliding block is correspondingly arranged in the middle of the lower end face of the first seat plate, and the sliding block is mounted in the sliding groove in a sliding mode; and/or the presence of a gas in the gas,

the wire clamping structure comprises a second seat plate, two extension arms are arranged at the upper end of the second seat plate and are respectively positioned on two sides of the guide plate in the width direction, and the extension arms are respectively installed on two side ends corresponding to the guide plate in a sliding mode.

In the technical scheme of the invention, warp yarns are obliquely connected to the upper end of a core mould, a certain included angle is formed between the warp yarns and the outer wall surface of the core mould, the core mould is positioned in the middle of the through hole, a plurality of beating-up devices are uniformly distributed on the peripheral side of the core mould, weft yarns are drawn by a shuttle structure, the ratchets on the shuttle structure are sequentially contacted with one or two ratchet structures under the action of the plurality of ratchet structures, so that the ratchets are driven to do circumferential motion on the arrangement track of the plurality of ratchet structures, the weft yarns are wound on the outer surfaces of the plurality of warp yarns, the stability and the continuity of the equipment are improved by the meshing fit of the ratchet structures and the ratchets, the weft yarns are tensioned by a weft yarn tensioning mechanism, and the tensioned weft yarns are attached to the outer wall surface of the core mould, so that the weft yarns and the warp yarns generate an inside and outside overlapping effect on the outer wall surface of the core mould, prepare for beating-up and improve the performance of the fabric.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a perspective view of an embodiment of a weft insertion system according to the present invention;

FIG. 2 is an enlarged schematic view of detail A of FIG. 1;

FIG. 3 is a perspective view of the ratchet structure of FIG. 1;

FIG. 4 is a perspective view of the shuttle structure of FIG. 1;

FIG. 5 is a perspective view of the pretensioning assembly of FIG. 1;

FIG. 6 is a schematic perspective view of the weft yarn take-up mechanism of FIG. 1;

fig. 7 is a perspective view of the wire pulling assembly of fig. 6.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The multilayer three-dimensional cylindrical composite material fabric is widely applied to various fields due to the excellent mechanical property and the light weight. The automation of multilayer cylindrical three-dimensional weaving machines has been realized, and the automatic weft insertion mechanism and warp tension control of the three-dimensional cylindrical weaving machine are always technical problems. Although the existing cylindrical weaving machine capable of weaving various thickness requirements can efficiently finish weaving, the weft insertion mechanism of the existing cylindrical weaving machine has the phenomena of top teeth and clamping teeth, so that the integral weaving efficiency of the weaving machine is influenced, and the woven fabric with small tension provided by weft yarns can cause that warp yarns are not completely close to a core mold, so that the weaving performance of the cylindrical fabric is directly influenced. In view of the above, the present invention provides a weft insertion system, and fig. 1 to 7 are embodiments of the weft insertion system provided by the present invention.

Referring to fig. 1 and 4, the weft insertion system 100 includes a base 1, a weft insertion shuttle mechanism 2 and a driving mechanism, wherein a through hole 11 is formed on an upper end surface of the base 1, and the through hole 11 is used for accommodating a core mold and a beating-up device; the weft insertion shuttle mechanism 2 comprises a shuttle structure 21 movably mounted on the base 1 along the circumferential direction of the base 1, the shuttle structure 21 is positioned at the side of the through hole 11, and the shuttle structure 21 is used for drawing weft yarns so that the weft yarns are wound on the outer sides of a plurality of warp yarns; the driving mechanism comprises a ratchet bar 31 and a plurality of ratchet structures 32, the plurality of ratchet structures 32 are arranged at intervals along the circumferential direction of the base 1, each ratchet structure 32 is rotatably mounted to the upper end face of the base 1 along an axis extending up and down, the ratchet bar 31 is fixedly mounted to the lower end of the shuttle structure 21, and the ratchet bar 31 can be selectively meshed with at least one ratchet structure 32 to drive the shuttle structure 21 to rotate; the weft yarn tensioning mechanism 44 is arranged on the base 1 and is arranged corresponding to one of the ratchet wheel structures 32, and the weft yarn tensioning mechanism 44 is used for tensioning the weft yarn led out by the shuttle structure 21 so that the weft yarn drives the warp yarn to be attached to the outer wall surface of the core mold.

In the technical scheme of the invention, warp yarns are obliquely connected to the upper end of a core mould and form a certain included angle with the outer wall surface of the core mould, the core mould is positioned in the middle of the through hole 11, a plurality of beating-up devices are uniformly distributed on the peripheral side of the core mould, the shuttle structure 21 pulls weft yarns, the ratchet strip 22 on the shuttle structure 21 is sequentially contacted with one or two ratchet structures 32 under the action of the ratchet structures 32 so as to drive the ratchet strip 31 to do circumferential motion on the arrangement track of the ratchet structures 32, so that the weft yarns are wound on the outer surfaces of the warp yarns, the stability and the continuity of the device are improved through the meshing fit of the ratchet structures 32 and the ratchet strip 31, the weft yarns are tensioned through the weft yarn tensioning mechanism 4, and the tensioned weft yarns are attached to the outer wall surface of the core mould, so that the weft yarns and the warp yarns generate an inside and outside overlapping effect on the outer wall surface of the core mould, prepare for beating-up and improve the performance of the fabric.

Specifically, in order to realize the driving of the ratchet structures 32, in an embodiment, referring to fig. 2, the driving mechanism further includes a plurality of fixing plates 33 and a plurality of driving motors 34 corresponding to the plurality of ratchet structures 32 one by one, the plurality of fixing plates 33 are disposed at intervals along the circumferential direction of the base 1 and are located on the circumferential side of the through hole 11, and an accommodating space is formed between each fixing plate 33 and the base 1 for the corresponding ratchet structures 32 to be mounted; the plurality of driving motors 34 are correspondingly mounted on the plurality of fixing plates 33, each driving motor 34 is provided with a driving shaft extending along the vertical direction, and each driving shaft penetrates through the corresponding fixing plate 33 and extends into the accommodating space so as to be fixedly connected with the middle part of the corresponding ratchet structure 32; each ratchet structure 32 at least partially protrudes from the side end of each fixing plate 33 facing the through hole 11. Each ratchet structure 32 is respectively controlled by each driving motor 34, the driving motors 34 rotate to drive the ratchet structures 32 to rotate in the accommodating space, the ratchet strip 31 is engaged with the part of the ratchet structure 32 protruding out of the fixing plate 33, that is, during the whole circular motion, the initial ratchet structure 32 is engaged with the ratchet strip 31, and with the driving of the corresponding driving motor 34, one end of the ratchet strip 31 moves to be engaged with the other ratchet structure 32 but is not separated from the initial ratchet structure 32, so that the circular motion is completed sequentially through the different ratchet structures 32 on the circumference, and the engagement mode is more stable.

In other embodiments, a single overall drive is provided and coupled to the center of each of the ratchet structures 32 by way of a plurality of gears and a plurality of drive links, or a plurality of belts and a plurality of pulleys, which are provided to control the synchronous drive of a plurality of the ratchet structures 32 and will not be described in detail herein.

Further, in the present embodiment, referring to fig. 3, each ratchet structure 32 includes a supporting disk 321, a plurality of movable push rods 322 and a plurality of compression springs 323, a plurality of mounting grooves 3211 are formed on a side surface of the supporting disk 321, the mounting grooves 3211 are uniformly distributed along a circumferential direction, and a through hole is formed through a middle portion of the supporting disk 321; the movable top rods 322 are movably mounted in the mounting grooves 3211, and at least a portion of each movable top rod 322 protrudes from the supporting disc 321 to engage with the ratchet 31; the compression springs 323 are arranged in the mounting grooves 3211, and both ends of each compression spring 323 are respectively abutted against the inner wall surfaces of the movable ejector rod 322 and the mounting groove 3211; wherein, the corresponding driving shaft extends into the through hole to be fixedly connected with the supporting disc 321. The compression springs 323 and the movable push rods 322 cooperate to form a flexible tooth structure, so that the entire ratchet structure 32 is a flexible mechanism, and thus, the problems of tooth collision and tooth jamming can be avoided and the stability of the device can be improved in the process that the ratchet structure 32 cooperates with the ratchet bar 31 to perform circular motion.

Based on the above embodiment, each movable top bar 322 is compressed to move in the mounting groove 3211, and rebounds under the action of a spring force, so as to prevent the movable top bar 322 from coming out of the mounting groove 3211 due to an excessive elastic force of the spring, in each ratchet structure 32, the outer surface of the movable top bar 322 is provided with a stopping protrusion 3221; a limiting protrusion 32111 is correspondingly arranged at the notch of the mounting groove 3211, and the limiting protrusion 32111 abuts against the stopping protrusion 3221 to limit the moving stroke of the movable ejector rod 322 in the direction back to the via hole. The end faces of the limit protrusion 32111 opposite to the stop protrusion 3221 are attached to each other, so as to form a hard limit at the position close to the notch of the mounting groove 3211, and limit the movement stroke of the movable top rod 322, thereby preventing the movable top rod 322 from being removed.

In order to ensure the stability of the plurality of ratchet bars 31 between the ratchet structures 32, referring to fig. 2, the driving mechanism further includes a plurality of guide structures disposed corresponding to the plurality of fixing plates 33, each guide structure includes two guide wheels 351, a supporting wheel 352 and an arc-shaped plate 353, the two guide wheels 351 are disposed at a side end of the fixing plate 33 facing the through hole 11, the two guide wheels 351 are rotatably mounted along an axis extending in a vertical direction and are spaced apart from each other along a length direction of the fixing plate 33, and outer side surfaces of the two guide wheels 351 are each provided with a first annular groove; the supporting wheel 352 is rotatably mounted on the upper end surface of the base 1 along an axis extending in the vertical direction, the supporting wheel 352 is located between the two guide wheels 351 and is located on one side of the two guide wheels 351 facing the through hole 11, and a second annular groove is formed in the outer surface of the supporting wheel 352; the arc-shaped plate 353 is fixedly installed on the lower end surface of the ratchet bar 31, and the arc-shaped plate 353 is respectively installed in the first annular groove and the second annular groove in a sliding manner along the two ends of the through hole 11 in the radial direction. The part of the ratchet structure 32 protruding from the fixed plate 33 is located between the two guide wheels 351. Specifically, the first annular grooves on the two guide wheels 351 are V-shaped grooves which mainly play a role in guiding and matching the arc-shaped plate 353, and the second annular groove on the support wheel 352 is U-shaped groove which is mainly used for limiting and bearing force, so that the arc-shaped plate 353 is ensured to be in contact with the support wheel 352 in at least one guide structure and one annular groove on the guide wheel 351, and therefore the ratchet bar 31 is guided and limited in the process of circular motion, and has better stability. It should be noted that, due to the difference in function, the two guide wheels 351 are configured as small rollers, and the support wheel 352 is configured as a large roller.

Specifically, in the process that the arc-shaped plate 353 moves under the action of the ratchet bar 31 and the ratchet structure 32, when the ratchet bar 31 is engaged with only one ratchet structure 32, the arc-shaped plate 353 is limited by two first annular grooves and two second annular grooves in the corresponding guide structures on the fixing plate 33, when the ratchet bar 31 is engaged with two ratchet structures 31 simultaneously, one of the guide wheels 351 and the support wheel 352 on one fixing plate 33 in the two associated fixing plates 33 is matched with the arc-shaped plate 353, and one of the guide wheels 351 on the other fixing plate 33 is matched correspondingly, so that the arc-shaped plate 353 can always receive a positioning effect of triangular support, and the stability of circular motion is good.

In order to facilitate the positioning of the current position of the ratchet 31 and the control of the movement speed of the ratchet 31, in an embodiment of the present invention, a magnetic induction position control sensor 36 is disposed on each of the fixing plates 33; the ratchet 31 is provided with a magnet to be electromagnetically engaged with the plurality of magnetic induction position control sensors 36, respectively. Specifically, the magnet is located on a part of the arc-shaped plate 353, and when the magnet is moved to contact with one of the magnetic induction position control sensors 36, the ratchet 31 can be stopped under the action of electromagnetic induction, so that the shuttle structure 21 is stopped at a position which is relatively fixed and uniformly distributed on the circumference after completing the weft insertion movement each time.

Further, in this embodiment, the shuttle mechanism 21 includes a bracket 211, a first cross bar 212 and a plurality of wire guiding loops, the bracket 211 includes two connecting arms 2111, upper ends of the two connecting arms 2111 are connected, and lower ends of the two connecting arms 2111 are spaced apart from each other and disposed on an upper end surface of the ratchet bar 31; the first cross bar 212 is located between the two connecting arms 2111; the plurality of the guide loops include a first guide loop 215a and a second guide loop 215b, the first guide loop 215a is disposed at the middle of the first cross bar 212, the second guide loop 215b is disposed at the connection position of the two connection arms 2111, the first cross bar 212 is disposed near the bobbin, and the weft yarn on the bobbin sequentially passes through the first guide loop 215a and the second guide loop 215b to be connected to the core mold so as to be interwoven with the warp yarn on the core mold.

Considering that a certain length of weft yarn does not participate in the weft insertion and beating-up actions after the weft yarn is tensioned in the winding process, and after each weft insertion movement is finished, the weft yarn tensioning mechanism 44 releases the weft yarn, and then the redundant length of weft yarn stays outside the shuttle structure 21, referring to fig. 4, in this embodiment, the shuttle structure 21 further includes a second cross bar 213, a third cross bar 214, a guide rod and two first springs 216, the second cross bar 213 is located between the two connecting arms 2111 and above the first cross bar 212, and the middle of the second cross bar 213 is provided with a wire guiding ring; the third cross bar 214 is located between the two connecting arms 2111 and above the second cross bar 213, and two wire loops are arranged on the third cross bar 214 at intervals; the guide rod extends vertically, two ends of the guide rod are respectively and fixedly connected with the second cross rod 213 and the third cross rod 214, and a movable wire guiding ring 215c is sleeved on the outer surface of the guide rod; the two first springs 216 are sleeved on the outer surface of the guide rod and are respectively positioned on the upper side and the lower side of the movable wire ring 215 c; wherein the weft yarn passes through the first thread guiding loop 215a, the thread guiding loop on the second cross bar 213, one of the thread guiding loops on the third cross bar 214, the movable thread guiding loop 215c, the other thread guiding loop on the third cross bar 214, and the second thread guiding loop 215b in sequence to be connected to the core mold. The weft yarns are sequentially wound on the yarn guiding rings on the cross bars to have a good tightening effect, meanwhile, when the weft yarn tightening mechanism 44 works, the first spring 216 positioned above is contracted, the first spring 216 positioned below is stretched, the movable yarn guiding ring 215c moves upwards and is always positioned at a position close to the second yarn guiding ring 215b in the weft yarn tightening process, when the weft yarn tightening mechanism 44 stops working, the first spring 216 and the second spring 233 both need to rebound, and at the moment, the movable yarn guiding ring 215c moves downwards to pull back the weft yarns for a certain distance in the direction of a yarn bobbin, so that the weft yarns with the surplus length are retracted on the shuttle structure 21.

In the two first springs 216, the elastic modulus of the first spring 216 located below the movable wire loop 215c is smaller than the elastic modulus of the first spring 216 located above the movable wire loop 215 c. The first spring 216 with a large elastic coefficient is used for buffering the instantaneous tension of the weft yarn during beating-up. The first spring 216, which has a low spring constant, is used to tension the weft yarn that is loosened by pulling the weft yarn against the mandrel after beating up.

Furthermore, the weft insertion shuttle mechanism 2 further comprises a bobbin fixing seat 22, the bobbin fixing seat 22 is fixedly installed on the ratchet bar 31 and located between the two connecting arms 2111, the bobbin fixing seat 22 is provided with a rotating shaft 221 which is rotatably installed along the length direction of the ratchet bar 31, and the rotating shaft 221 is used for sleeving and installing a bobbin. So set up and make a yarn section of thick bamboo follow this the motion of ratchet 31 does not influence the unwrapping wire action of a yarn section of thick bamboo simultaneously again, guarantees that outside wiring is clean and tidy, and the line pull on a yarn section of thick bamboo finishes, change a yarn section of thick bamboo can, specifically, a yarn section of thick bamboo passes through butterfly nut and installs on yarn section of thick bamboo fixing base 22.

The rotating shaft 221 and the bobbin fixing seat 22 rotate at a gap, and the bobbin is subjected to tension and resilience in the process of paying off, so that the bobbin fixing seat 22 below the bobbin can swing in the spinning process. In view of the above, in an embodiment of the present invention, referring to fig. 5, one end of the rotating shaft 221 protrudes from the bobbin fixing seat 22; the weft insertion shuttle mechanism 2 further comprises a pre-tightening assembly 23, the pre-tightening assembly 23 comprises a supporting seat 231, a friction block 232 and a second spring 233, the supporting seat 231 is fixedly connected with the side end of the bobbin fixing seat and is positioned below the part of the rotating shaft 221 protruding out of the bobbin fixing seat; the friction block 232 is positioned between the bobbin fixing seat and the rotating shaft 221, the upper end surface of the friction block 232 is abutted to the part, protruding out of the bobbin fixing seat, of the rotating shaft 221, and a groove is formed in the lower end surface of the friction block 232; the second spring 233 is disposed in the groove, and the second spring 233 abuts against the support seat 231 and the upper wall surface of the groove. In a natural state, the lower end of the friction block 232 is acted by the elastic force of the second spring 233, so that the upper end of the friction block 232 always abuts against the rotating shaft 221, thereby providing a friction force for the rotating process of the moving shaft, and the tension in the spinning process of the yarn bobbin is adjusted by adjusting the elastic coefficient of the second spring 233.

Specifically, the friction block 232 is connected to the support seat 231 through a limit bolt, so as to prevent the friction block from falling off in the using process, and the friction block 232 is made of an elastic material with friction resistance, so as to protect the rotating shaft 221.

In order to realize the function of the weft yarn tensioning mechanism 44, referring to fig. 6 to 7, the weft yarn tensioning mechanism 44 includes a mounting seat 41, a yarn clamping component and a pulling component 43, the mounting seat 41 is fixed on the base 1 and is arranged corresponding to one of the ratchet structures 32, the yarn clamping component is located at one side of the corresponding ratchet structure 32 facing the through hole 11, the yarn clamping component includes a yarn clamping structure, the yarn clamping structure is movably mounted on the mounting seat 41 along a first direction, and the yarn clamping structure is used for clamping the lower part of the weft yarn; the thread pulling assembly 43 is located above the corresponding ratchet structure 32, the thread pulling assembly 43 comprises at least one thread pulling rod 431 located above the thread clamping structure, the thread pulling rod 431 is arranged on the mounting base 41, and the thread pulling rod 431 can move in the first direction and the second direction relative to the mounting base 41 and is used for hooking the upper part of the weft and pulling the weft to be tight after the lower part of the weft is fixed by the thread clamping structure; wherein the first direction and the second direction are staggered in a horizontal plane. In the technical scheme of the invention, weft yarns are drawn out from a yarn barrel, the other end of the weft yarns and warp yarns are overlapped to be adhered to a core mold together, the yarn clamping structure moves to be in contact with the lower part of the weft yarns along a first direction and tightly clamp the lower part of the weft yarns as positioning assistance, the pull rod 431 is adjusted in position along the first direction and a second direction to hook the upper part of the weft yarns, then the pull rod 431 moves reversely along the first direction to tightly tighten the weft yarns, so that the weft yarns are adhered to the core mold firstly and are beaten up finally, and the defects of small fabric density and different cylinder fabric vertical diameters caused by gradual loosening of the weft yarns and the warp yarns during beating up due to the fact that the tension of the weft yarns is too small are overcome.

In one embodiment, a plurality of air cylinders are designed to be linked to realize the displacement of the wire pulling rod 431 in two directions, in other embodiments, in consideration of the fact that weft yarns may shake due to force during tensioning, and in order to avoid the slippage of the weft yarns with the wire pulling rod 431, in one embodiment of the present invention, the wire pulling assembly 43 further comprises a first seat plate 432 and a mounting block 433, wherein the first seat plate 432 is movably mounted on the mounting seat 41 along a first direction; the mounting block 433 is fixedly mounted on the upper end surface of the first seat plate 432, a thread accommodating groove 4331 is formed in the end surface, deviating from the first pneumatic clamping jaw 4341, of the mounting block 433, and the thread accommodating groove 4331 is used for accommodating weft yarns; the first wire pulling rod 431 is movably mounted to the first seat plate 432 along a second direction and is disposed corresponding to the notch of the wire accommodating groove 4331 to shield or open the notch of the wire accommodating groove 4331. That is, the weft is firstly placed in the thread containing groove 4331 by the movement of the first seat plate 432 along the first direction, the slot opening is closed by the thread pulling rod 431, when the first seat plate 432 moves reversely, the weft is contacted with the thread pulling rod 431 and is driven to be tensioned, and the stability of the thread pulling process is ensured.

In other embodiments of the present invention, two opposite side surfaces of the mounting block 433 along the second direction are respectively provided with a communication hole 11, and both the communication holes 11 are communicated with the line-containing slot 4331; the two wire drawing rods 431 are arranged, the two wire drawing rods 431 are respectively arranged in the two communication holes 11 in a penetrating mode, and the two wire drawing rods 431 are abutted to jointly shield the notches of the wire accommodating grooves 4331. The two wire pulling rods 431 are designed to share the reaction force during wire pulling, and meanwhile, the length of the single wire pulling rod 431 is reduced, so that the strength is increased, and the breakage or deformation in long-time use is avoided.

Based on the above embodiment, referring to fig. 7 again, the wire pulling assembly 43 further includes a wire pulling rod driving structure, the wire pulling rod driving structure includes a first pneumatic clamping jaw 4341 and two connecting rods 4342, the first pneumatic clamping jaw 4341 is fixedly mounted on the upper end surface of the first seat plate 432, the first pneumatic clamping jaw 4341 has two first clamping arms, and the two first clamping arms have a moving stroke approaching to or departing from each other along a second direction; the two connecting rods 4342 extend along a first direction, one end of each of the two connecting rods 4342 is fixedly connected with the two first clamping arms, and the two pull rods 431 are fixedly mounted on the opposite side surfaces of the other ends of the two connecting rods 4342. The pneumatic clamping jaw is also called a pneumatic finger, and is similar to the opening and closing of the finger when in action, so that the two pull rods 431 can be synchronously driven by one device, and the connecting rod 4342 is designed to make up for the distance difference between the first clamping arm and the line accommodating groove 4331.

Further, the wire pulling assembly 43 further comprises a first limiting structure, the first limiting structure comprises a first protrusion 4351 and a first groove 4352, which are matched with each other, and the first protrusion 4351 and the first groove 4352 are respectively disposed on the two opposite end faces of the wire pulling rod 431. The first protrusion 4351 and the first groove 4352 enable the two wire drawing rods 431 to be tightly buckled when being abutted against each other, so that weft yarns are prevented from sliding out of a gap between the two wire drawing rods 431 and falling out of the wire accommodating groove 4331.

The thread accommodating groove 4331 is configured as a U-shaped groove and is not easily positioned with the weft during movement, and for this reason, in an embodiment of the present invention, the thread catcher further includes a Y-shaped thread catcher, specifically, the thread catcher includes two thread guiding rods 436 arranged at intervals along the second direction, one end of each of the two thread guiding rods 436 is fixedly mounted to the lower end surface of the mounting block 433 and is arranged corresponding to the thread accommodating groove 4331, the other end of each of the two thread guiding rods 436 extends in a direction away from the thread accommodating groove 4331, a distance between the two thread guiding rods 436 gradually increases in a direction away from the thread accommodating groove 4331, and the two thread guiding rods 436 are configured to selectively contact with the weft and guide the weft into the thread accommodating groove 4331 along with movement of the first seat plate 432. The two lead-through pins 436 have a bell-mouth-like structure, which widens the contact range with the weft yarn, and the weft yarn is gradually drawn into the thread-receiving groove 4331 along the inclined surface thereof regardless of the contact of the weft yarn with any of the lead-through pins 436, thereby facilitating the catching of the weft yarn.

It should be noted that the connecting ends of the two lead rods 436 are made into a U-shaped structure surrounding the periphery of the wire accommodating groove 4331 to form a perfect correspondence.

The invention is not limited to the specific form of the function realized by the thread clamping structure, in an embodiment, the thread clamping structure is a structure similar to a mechanical clamping jaw, has a better flexibility and can grab weft threads, in this embodiment, the thread clamping structure comprises a second seat plate 4211, a second pneumatic clamping jaw 4212 and two clamping plates 4213, the second seat plate 4211 extends in the up-down direction and is movably mounted on the mounting seat 41 in the first direction; the second pneumatic clamping jaw 4212 is fixedly mounted on the second seat plate 4211, the second pneumatic clamping jaw 4212 has two second clamping arms, and the two second clamping arms have movable strokes which are close to or far away from each other along a second direction; two clamping plates 4213 are respectively fixedly arranged on the two second clamping arms, and the two clamping plates 4213 are abutted for clamping the lower part of the weft yarn together. The second pneumatic clamping jaw 4212 can simultaneously drive the two clamping plates 4213 to move simultaneously, when the two clamping plates 4213 are close to each other and attached to each other, weft yarns are clamped tightly, the contact area between the weft yarns and the clamping plates 4213 in a matched mode is large, clamping precision is improved, and meanwhile the pneumatic clamping jaw 4212 is simple in structure and convenient to arrange.

Furthermore, the wire clamping assembly further comprises a second limiting structure, the second limiting structure comprises a second protrusion 4221 and a second groove 4222 which are matched with each other, the second protrusion 4221 and the second groove 4222 both extend along a first direction, and the second protrusion 4221 and the second groove 4222 are respectively arranged on the opposite end faces of the two clamping plates 4213. With two guarantee the cooperation between the two closely when splint 4213 laminates, second arch 4221 with second recess 4222 is rectangular shape structure, so set up and avoid when the stay 431 pulling weft, the effect of weft force received is followed two gap between splint 4213 is drawn, and the weft that lacks the centre gripping receives the pulling force and can lead to the yarn section of thick bamboo to continue the unwrapping wire to lead to invalid take-up.

In order to realize the sliding stroke of the first seat plate 432 and the second seat plate 4211 along the first direction, in an embodiment of the present invention, the weft yarn tensioning mechanism 44 further includes a guide plate 44, the guide plate 44 is fixedly mounted at the upper end of the mounting seat 41, a sliding slot extending along the first direction is provided in a middle of an upper end face of the guide plate 44, in an embodiment, the thread pulling assembly 43 further includes a first seat plate 432, the first seat plate 432 is provided for movably mounting the thread pulling rod 431, a sliding block 4321 is correspondingly provided in a middle of a lower end face of the first seat plate 432, and the sliding block 4321 is slidably mounted in the sliding slot; in another embodiment, the wire clamping structure includes a second seat plate 4211, the upper end of the second seat plate 4211 is provided with two extension arms 42111, the two extension arms 42111 are respectively located at two sides of the guide plate 44 in the width direction, and are respectively slidably mounted to the two corresponding side ends of the guide plate 44. In this embodiment, the first seat plate 432 and the second seat plate 4211 are both slidably mounted on the same guide plate 44, wherein one is located at the middle of the guide plate 44, and the other is located at the end of the guide plate 44, so that the overall structural layout is more compact, and the number of parts is reduced.

Further, in order to realize automatic control, the first seat plate 432 and the second seat plate 4211 are driven by two driving cylinders 45 arranged on the mounting seat 41, cylinder rods of the two driving cylinders 45 extend along the first direction, one of the driving cylinders 45 is located above the guide plate 44 and is fixedly connected with the first seat plate, and the other driving cylinder 45 is located at the side of the guide plate 44 and is fixedly connected with one of the extension arms, so that space is reasonably utilized. In other embodiments, the drive may be by an electric push rod, a multi-stage hydraulic cylinder, or the like.

Besides, the base 1 has a circular plate-shaped structure, the middle part of the base is hollowed to place a core mould and a beating-up device, the through hole 11 is a non-circular hole, but is a polygonal hole which is provided with a main body hole at the middle part and eight square holes which are communicated with the main body hole and are distributed circumferentially, so as to divide the peripheral side of the through hole 11 into eight sharp corner plate sections equally in the circumferential direction, and a set of the fixing plate 33, the driving motor 34, the ratchet structure 32, the magnetic induction position control sensor 36 and the guiding structure which are correspondingly matched are fixed on each sharp corner plate section, so that the ratchet 31 can continuously push the shuttle mechanism 21 to make a circular motion along the arrangement direction of the plurality of guide wheels 351 and make the shuttle mechanism 21 stop at a fixed point after each weft insertion motion is completed under the action of the magnetic induction position control sensor 36.

Furthermore, the second seat plate 4211 is located at a side of the corresponding driving motor 334 facing the through hole 11, when the weft yarn tensioning mechanism 4 is operated, the yarn clamping assembly moves in the first direction until the two clamping plates 4213 extend between the first crossbar 212 and the second crossbar 213 to clamp a weft yarn section at the position, and the yarn pulling assembly 43 moves in the first direction until the mounting block 433 extends between the third crossbar 214 and the second yarn guiding ring 215a, so that the weft yarn at the position falls into the yarn accommodating groove 4331 through the yarn catcher.

It should be noted that the first direction and the second direction in the present invention are actually two diameter directions of the circular base 1, an included angle between the first direction and the second direction on a plane is 90 °, and the corresponding mounting seat 41 is also located on one of the corner plate segments and is disposed to be away from the driving motor 34.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A weft insertion system for winding a weft yarn around an outer surface of a warp yarn and attaching the weft yarn to an outer wall surface of a core mold together, comprising:

the upper end surface of the base is provided with a through hole, and the through hole is used for accommodating the core mold and the beating-up device;

the driving mechanism comprises a ratchet bar and a plurality of ratchet structures, the ratchet structures are arranged at intervals along the circumferential direction of the base, each ratchet structure is rotatably installed on the upper end face of the base along an axis extending in the vertical direction, the ratchet bar is fixedly installed at the lower end of the shuttle structure, and the ratchet bar can be selectively meshed with at least one ratchet structure to drive the shuttle structure to rotate; and the number of the first and second groups,

2. Weft insertion system according to claim 1, characterized in that the drive mechanism further comprises:

3. Weft insertion system according to claim 2, characterized in that each of said ratchet structures comprises:

the compression springs are arranged in the installation grooves, and two ends of each compression spring are respectively abutted with the movable ejector rod and the inner wall surfaces of the installation grooves;

wherein, the corresponding drive shaft stretches into in the through hole to with support disc fixed connection.

4. An insertion system according to claim 3, characterized in that in each of said ratchet structures, the outer surface of said movable carrier bar is provided with a stop projection;

the notch of the mounting groove is correspondingly provided with a limiting bulge, and the limiting bulge is abutted to the stop bulge so as to limit the movable stroke of the movable ejector rod in the direction back to the via hole.

5. Weft insertion system according to claim 2, characterized in that the drive mechanism further comprises a plurality of guide structures provided for a plurality of said fixing plates, each of said guide structures comprising:

the arc-shaped plate is fixedly installed on the lower end face of the ratchet strip, and the arc-shaped plate is respectively installed in the two first annular grooves and the second annular groove in a sliding mode along the two ends of the through hole in the radial direction;

the part of the ratchet wheel structure protruding out of the fixing plate is positioned between the two guide wheels.

6. Weft insertion system according to claim 2, characterized in that each of said fixed plates is provided with a magnetically induced position control sensor;

7. Weft insertion system according to claim 1, characterized in that said shuttle structure comprises:

the weft yarn guiding device comprises a plurality of guiding rings, wherein the guiding rings comprise a first guiding ring and a second guiding ring, the first guiding ring is arranged in the middle of the first cross rod, and the second guiding ring is arranged at the joint of the two connecting arms and used for enabling weft yarns to sequentially penetrate through the first guiding ring and the second guiding ring to be connected onto a core mold.

8. Weft insertion system according to claim 7, characterized in that the shuttle structure further comprises:

the guide rod extends along the vertical direction, two ends of the guide rod are respectively and fixedly connected with the second cross rod and the third cross rod, and a movable wire guide ring is sleeved on the outer surface of the guide rod; and the number of the first and second groups,

9. The weft insertion system according to claim 7, characterized in that the weft insertion shuttle mechanism further comprises a bobbin holder fixedly mounted to the ratchet between the two connecting arms, the bobbin holder having a rotating shaft rotatably mounted along the length of the ratchet for mounting the bobbin thereon.

10. Weft insertion system according to claim 9, characterized in that one end of said rotating shaft is arranged protruding from said bobbin holding base;

the friction block is positioned between the yarn drum fixing seat and the rotating shaft, the upper end face of the friction block is abutted against the part of the rotating shaft protruding out of the yarn drum fixing seat, and the lower end face of the friction block is provided with a groove; and the number of the first and second groups,