WO2023024373A1 - 织机开口机构 - Google Patents

织机开口机构 Download PDF

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Publication number
WO2023024373A1
WO2023024373A1 PCT/CN2021/141921 CN2021141921W WO2023024373A1 WO 2023024373 A1 WO2023024373 A1 WO 2023024373A1 CN 2021141921 W CN2021141921 W CN 2021141921W WO 2023024373 A1 WO2023024373 A1 WO 2023024373A1
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heald frame
rod
connecting rod
heald
frame
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PCT/CN2021/141921
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English (en)
French (fr)
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詹葵华
邱梓衔
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Suzhou University
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Suzhou University
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C13/00—Shedding mechanisms not otherwise provided for

Definitions

  • the invention relates to the technical field of loom equipment, in particular to a loom opening mechanism.
  • the loom shedding mechanism is generally divided into four categories: connecting rod shedding mechanism, cam shedding mechanism, dobby shedding mechanism and jacquard shedding mechanism, which are applied to different fabrics.
  • connecting rod shedding mechanism cam shedding mechanism
  • cam shedding mechanism dobby shedding mechanism
  • jacquard shedding mechanism jacquard shedding mechanism
  • the link opening mechanism includes four-link and six-link mechanisms, none of which can realize the short-term pause of the heald frame when the shed is fully opened, that is, there is no static time for the heald frame movement, which affects the smooth passing of the shuttle, and the heald frame is fully opened. High acceleration may easily cause warp yarn breakage, so it is not suitable for wide-width looms;
  • the cam mechanism can design the cam profile according to the movement law of the heald frame to ensure that the heald frame moves up and down according to the predetermined movement law, and there is a period of rest at the limit position, but its processing requirements are high and the manufacturing cost is relatively high;
  • the motion laws of the heald frame used in the cam opening mechanism include the law of simple harmonic motion, the law of elliptic ratio motion, the law of sine acceleration motion, the law of combined acceleration motion of a straight line and cosine curve, the law of improved trapezoidal acceleration motion, and some studies have proposed a law of polynomial motion.
  • the disadvantage of the law of simple harmonic motion is that the acceleration of the heald frame is the largest at the limit position, and the heald frame will generate a certain inertial force, which will cause an impact, which is not suitable for high-speed looms; In the process of opening and closing, the acceleration changes greatly, which will cause the vibration of the heald frame and the large fluctuation of warp tension.
  • the technical problem to be solved by the present invention is to overcome the technical defects of the loom opening mechanism in the prior art, to use the connecting rod mechanism instead of the cam mechanism, and to realize the lifting of the heald frame that meets the requirements of the weaving process through the guidance of the special connecting rod curve. Movement, technically optimizes the law of heald frame movement, simplifies the structure of the mechanism, and reduces the manufacturing cost of the loom.
  • the present invention provides a loom shedding mechanism, which includes a first heald frame, a second heald frame, a connecting rod drive assembly, a heald frame curve guide assembly, and a heald frame lifting power transmission assembly;
  • the connecting rod driving assembly includes a crank, a connecting rod, a rocker and a frame rod.
  • One end of the crank is fixed, and the other end moves in a circle under the drive of the power source.
  • the fixed end of the crank is hinged to the frame rod.
  • the moving end of the crank is hinged to the connecting rod, the two ends of the rocking rod are respectively hinged to the connecting rod and the frame rod, and the crank, the connecting rod, the rocking rod and the frame rod are connected end to end to form a closed ring structure;
  • the heald frame curve guide assembly includes a connecting rod, a slider, and a guide groove push rod, one end of the connecting rod is fixedly connected to the connecting rod, the other end of the connecting rod is hinged to the slider, and the guide groove push rod Horizontally arranged, the guide groove push rod is provided with a chute for the slider to slide, and the connecting rod drive assembly drives the slider to move in a symmetrical curve through the connecting rod, driving the guide groove push rod to move up and down intermittently.
  • the push rod of the guide groove is connected with the first heald frame, and then drives the first heald frame to move up and down;
  • the heald frame lifting power transmission assembly transmits the motion of the first heald frame to the second heald frame, and makes the motion direction of the second heald frame opposite to that of the first heald frame.
  • the rod length ratio of the crank, connecting rod, rocker and rack rod in the connecting rod driving assembly is 1:2:2:2.7603.
  • the length of the connecting rod in the heald frame curve guiding assembly is equal to that of the connecting rod in the connecting rod driving assembly.
  • the symmetrical curved motion track is a sixth-order continuous closed curve, and its motion track includes two symmetrical curved motion tracks and two approximate linear motion tracks in a horizontal position.
  • the slider when the slider moves along a curved trajectory, it drives the push rod of the guide groove to move up and down, and when the slider moves along an approximate linear trajectory, the push rod of the guide groove at rest.
  • the two approximate linear motion trajectories are respectively located at the highest point and the lowest point of the motion trajectories.
  • the heald frame lifting power transmission assembly includes a double arm lever and a first lifting lever and a second lifting lever hinged at both ends of the double arm lever, the first lifting lever and the second lifting lever Drive the first heald frame and the second heald frame to move up and down respectively.
  • the first heald frame rises the power is transmitted to the second heald frame through the double arm lever, which drives the second heald frame down, and the first heald frame goes down.
  • the power is transmitted to the second heald frame through the double arm lever, which drives the second heald frame to rise.
  • the first heald frame and the second heald frame respectively include a first heddle push rod and a second heddle push rod extended, and the first heald push rod is fixed to the guide groove push rod connected, the first heald-pushing rod and the second heald-pushing rod are hinged to the ends of the first elevating rod and the second elevating rod respectively.
  • it also includes a heald frame push rod limit block, the first heddle push rod and the second heald push rod pass through the heald frame push rod limit block, and are pushed through the heald frame push rod limit block.
  • the rod limiting block limits the moving direction of the first heddle push rod and the second heddle push rod, so that the first heald frame and the second heald frame are always in a vertical state.
  • the loom shedding mechanism described in the present invention is different from the traditional connecting rod shedding mechanism.
  • the movement of the heald frame of this mechanism is guided by a special connecting rod curve generated by a special four-bar connecting mechanism.
  • the shedding movement of the loom can solve two major problems of the existing shedding mechanism:
  • the guided heald frame can realize a short pause at the upper and lower limit positions, which is beneficial to extend the distance of weft insertion, thus completely solving the problem that the traditional connecting rod shedding mechanism has no real static period, and widening the connecting rod opening
  • Fig. 1 is the overall structural representation of loom shedding mechanism of the present invention
  • Fig. 2 is a schematic structural view of the connecting rod drive assembly of the loom shedding mechanism of the present invention
  • Fig. 3 is a structural schematic diagram of the heald frame curve guide assembly of the loom shedding mechanism of the present invention
  • Fig. 4 is a structural schematic diagram of the frame lifting power transmission assembly of the loom shedding mechanism of the present invention.
  • Fig. 5 is a schematic diagram of the overall side structure of the opening mechanism of the loom of the present invention.
  • Fig. 6 is a schematic diagram of the movement cycle structure of the heald frame curve guide assembly of the loom shedding mechanism of the present invention
  • Fig. 7 is a graph showing the law of movement of the heald frame of the shedding mechanism of the loom of the present invention.
  • a loom shedding mechanism of the present invention includes a first heald frame 1, a second heald frame 2, a connecting rod drive assembly 3, a heald frame curve guiding assembly 4, and a heald frame lifting power transmission assembly 5 ;
  • the connecting rod driving assembly 3 adopts a special four-bar linkage mechanism to generate a special connecting rod curve, and realizes the intermittent up and down of the first heald frame 1 guided by this special connecting rod curve through the heald frame curve guiding assembly 4 Move, and finally through the heald frame lifting power transmission assembly 5, the motion of the first heald frame 1 is transmitted to the second heald frame 2, and the motion direction of the second heald frame 2 is opposite to that of the first heald frame 1.
  • the connecting rod drive assembly 3 includes a crank 31, a connecting rod 32, a rocker 33 and a frame rod 34, one end of the crank 31 is fixed, and the other end is driven by a power source to perform uniform circular motion.
  • the fixed end of the crank 31 is hinged with the frame rod 34
  • the moving end of the crank 31 is hinged with the connecting rod 32
  • the two ends of the rocking rod 33 are respectively hinged with the connecting rod 32 and the frame rod 34.
  • the crank 31 , the connecting rod 32, the rocking bar 33 and the frame bar 34 are connected end to end to form a closed ring structure;
  • the rod length ratio of the crank 31 , the connecting rod 32 , the rocker 33 and the frame rod 34 in the connecting rod driving assembly 3 is 1:2:2:2.7603.
  • the heald frame curve guide assembly 4 includes a connecting rod 41, a slide block 42, a guide groove push rod 43, one end of the connecting rod 41 is fixedly connected with the connecting rod 32, and the connecting rod 41 The other end is hinged with the slide block 42, and the guide groove push rod 43 is horizontally arranged, and a chute for the slide block 42 to slide is arranged in the described guide groove push rod 43, and the connecting rod driving assembly 4 drives the slide through the connecting rod 41.
  • the block 42 moves in a symmetrical curve, and then drives the guide groove push rod 43 and the first heald frame 1 to move up and down intermittently;
  • the length of the connecting rod 41 in the heald frame curve guiding assembly 4 is equal to that of the connecting rod 32 in the connecting rod driving assembly 3 , and the angle between the connecting rod 41 and the connecting rod 32 is 54.8385°.
  • the motion track of the slider 42 is a symmetrical connecting rod curve
  • the symmetrical connecting rod curve is a 6th-order continuous closed curve, which is an oblong circle and includes two symmetrical curved moving tracks and two The section is in the approximate linear motion track in the horizontal position.
  • the slider 42 moves along the curved track, it drives the guide groove push rod 43 to move up and down.
  • the guide groove push rod 43 is in a static state, and two sections of approximately straight-line motion trajectories are respectively located at the highest point and the lowest point of the motion trajectories.
  • the heald frame lifting power transmission assembly 5 includes a double arm lever 51 and a first lifting lever 52 and a second lifting lever 53 hinged at both ends of the double arm lever 51, the first lifting lever 52 and the second lifting lever Two elevating rods 53 respectively drive the first heald frame 1 and the second heald frame 2 to move up and down. 2 descending, when the first heald frame 1 descends, the power is transmitted to the second heald frame 2 through the double arm lever 51, driving the second heald frame 2 to rise;
  • the first heald frame 1 and the second heald frame 2 respectively include a first heddle push rod 54 and a second heddle push rod 55 which are extended, and the first heald push rod 54 is connected with the guide groove push rod 43 , the The first lifting rod 52 and the second lifting rod 53 are respectively hinged on the first pushing rod 54 and the second pushing rod 55;
  • the heald frame lifting power transmission assembly 5 also includes a heald frame push rod limiting block 56, the first heald pushing rod 54 and the second heald pushing rod 55 pass through the heald frame pushing rod limiting block 56, The movement directions of the first heald frame push rod 54 and the second heald frame push rod 55 are limited by the limit block 56 of the heald frame push rod, so that the first heald frame 1 and the second heald frame 2 are always in a vertical state.
  • the first heald frame 1 and the second heald frame 2 are all provided with a plurality of warp heald eyes, and the yarn passes through the warp heddle eyes, and passes through the first heald frame 1 and the second heald frame.
  • the yarns of the two heald frames 2 form two warp layers, and the first heald frame 1 and the second heald frame 2 are driven by the connecting rod driving assembly 3, the heald frame curve guiding assembly 4, and the heald frame lifting power transmission assembly 5.
  • Make up and down reciprocating motion in the opposite direction when the warp yarn layer on the first heald frame 1 rises to the highest position, the warp yarn layer on the second heald frame 2 descends to the lowest position, and a shed is formed between the two warp yarn layers;
  • the shedding mechanism for weaving plain weave fabrics according to the technical requirements of the upper and lower layers of warp alternately, the main shaft of the loom rotates once to complete a shedding movement, and the main shaft of the loom rotates twice, that is, the crank 31 rotates once, and the heald frame completes a movement.
  • a shedding movement is divided into three stages: 1 shedding stage: the warp thread from the warp position line to the fully open shed position; 2 static stage: the warp thread is at the fully open shed position; 3 closing stage: the warp thread is at the fully open shed position Return to the warp position line; the time distribution design of the heald frame movement corresponding to the three stages is different due to different fabrics.
  • described crank 31 is done uniform circular motion, and when described crank 31 is perpendicular to frame bar 34, it is approximate heald flat time, obtains the law of motion of heald frame as shown in Fig. 7, the displacement diagram of heald frame It shows that the static time is close to 120°, which fully meets the technical requirements of most looms.
  • the speed of the heald frame is zero when the shed is fully opened, the normal speed of the heald is the maximum, and the acceleration is zero when the shed is fully open.
  • the curve continuity is good.
  • the shedding mechanism of the loom in this embodiment belongs to the low-pair mechanism, the manufacturing cost is low, it is not easy to wear, and can meet the technological requirements of the three stages of the shedding movement (opening, rest, and closing), and the time allocation is reasonable, and at the same time It can meet the motion continuity requirements of the heald frame.
  • the speed is the largest when the heald is normal, and it is zero when it is fully open; the acceleration at the end of the opening and the beginning of the closing is zero, and the acceleration changes throughout the motion cycle. Stability problem.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

本发明涉及一种织机开口机构，包括第一综框、第二综框、连杆驱动组件、综框曲线导引组件、综框升降动力传递组件；连杆驱动组件包括曲柄、连杆、摇杆和机架杆，曲柄、连杆、摇杆和机架杆首尾相接形成闭合的环状结构；综框曲线导引组件包括连接杆、滑块、导槽推杆，连杆驱动组件通过连接杆带动滑块作对称曲线运动，带动导槽推杆间歇性的上下移动，进而带动第一综框作升降运动；综框升降动力传递组件将第一综框的运动传递到第二综框，并使第二综框的运动方向与第一综框的运动方向相反。本发明应用连杆机构代替凸轮机构，通过特殊连杆曲线导引实现满足织造工艺要求的综框升降运动，从技术上优化综框的运动规律，简化机构结构，降低织机制造成本。

Description

织机开口机构 技术领域
本发明涉及织机设备技术领域，尤其是指一种织机开口机构。
背景技术
织机开口机构一般分为四类：连杆开口机构、凸轮开口机构、多臂开口机构和提花开口机构，它们应用于不同的织物。针对平纹织物的织造，早期的喷水织机和丝织机采用四连杆开口机构，喷气织机则多采用六连杆开口机构，随着新型织机对高速、宽幅要求的提高，凸轮开口机构的应用越来越广泛。
连杆开口机构包括四连杆和六连杆机构，它们均无法实现梭口满开时综框的短暂停歇，即综框运动无静止时间，影响梭子顺利穿过，而且综框在满开时加速度大，容易造成经纱断头，不适用于宽幅织机；
凸轮机构能按照综框运动规律设计凸轮轮廓以保证综框按预定的运动规律作升降运动，并且在极限位置有一段静止时间，但是，它的加工要求高，制造成本相对较高；
目前凸轮开口机构使用的综框运动规律有简谐运动规律、椭圆比运动规律、正弦加速运动规律、直线与余弦曲线组合加速运动规律、改良梯形加速运动规律，也有研究提出多项式运动规律。简谐运动规律的缺点是综框在极限位置加速度最大，综框会产生一定的惯性力，从而引起冲击，不适合高速织机；椭圆比运动规律在综框运动极限位置的加速度较小，但在开口、闭口过程中加速度变化较大，它会引起综框的振动和经纱张力的较大波动。相比之下，正弦加速运动规律与综框运动要求最为接近，但仍存在静止期始末位置跃度不连续(加速度曲线一阶不连续)的问题，这意味着经纱在承受最大 张力的时候会受到综框振动的影响，从而引起纱线断头。而后三种运动规律虽然在综框运动的连续性方面进行了改良，但仍然存在跃度小突变或加大凸轮加工精度要求的缺陷。另外，凸轮开口机构难以避免因转子与凸轮间较大间隙引起的冲击，这也是一个不利的因素。
发明内容
为此，本发明所要解决的技术问题在于克服现有技术中织机开口机构存在的技术缺陷，应用连杆机构代替凸轮机构，通过特殊连杆曲线导引，实现满足织造工艺要求的综框升降运动，从技术上优化综框运动的规律，简化机构结构，降低织机制造成本。
为解决上述技术问题，本发明提供了一种织机开口机构，包括第一综框、第二综框、连杆驱动组件、综框曲线导引组件、综框升降动力传递组件；
所述连杆驱动组件包括曲柄、连杆、摇杆和机架杆，所述曲柄一端固定，另一端在动力源的带动下作圆周运动，所述曲柄的固定端与机架杆铰接，所述曲柄的运动端与连杆铰接，所述摇杆两端分别与连杆和机架杆铰接，所述曲柄、连杆、摇杆和机架杆首尾相接形成闭合的环状结构；
所述综框曲线导引组件包括连接杆、滑块、导槽推杆，所述连接杆的一端与连杆固定连接，所述连接杆的另一端与滑块铰接，所述导槽推杆水平设置，所述导槽推杆内设置有供滑块滑动的滑槽，所述连杆驱动组件通过连接杆带动滑块作对称曲线运动，带动导槽推杆间歇性地上下移动，所述导槽推杆与第一综框连接,进而带动第一综框作升降运动；
所述综框升降动力传递组件将第一综框的运动传递到第二综框，并使第二综框的运动方向与第一综框的运动方向相反。
在本发明的一个实施例中，所述连杆驱动组件中的曲柄、连杆、摇杆和机架杆的杆长比例关系为1：2：2：2.7603。
在本发明的一个实施例中，所述综框曲线导引组件中的连接杆与所述连杆驱动组件中连杆长度相等。
在本发明的一个实施例中，所述对称曲线运动轨迹为6阶连续闭合曲线，其运动轨迹包括两段对称的曲线运动轨迹及两段处于水平位置的近似直线运动轨迹。
在本发明的一个实施例中，所述滑块在沿曲线运动轨迹运动时，带动所述导槽推杆上下运动，所述滑块在沿近似直线运动轨迹运动时，所述导槽推杆处于静止状态。
在本发明的一个实施例中，两段近似直线运动轨迹分别位于运动轨迹的最高点和最低点。
在本发明的一个实施例中，所述综框升降动力传递组件包括双臂杆和铰接在双臂杆两端的第一升降杆和第二升降杆，所述第一升降杆和第二升降杆分别带动第一综框和第二综框作升降运动，所述第一综框上升时通过双臂杆将动力传递到第二综框，带动第二综框下降，所述第一综框下降时通过双臂杆将动力传递到第二综框，带动第二综框上升。
在本发明的一个实施例中，所述第一综框和第二综框分别包括延伸设置的第一推综杆和第二推综杆，所述第一推综杆与导槽推杆固定连接，所述第一推综杆和第二推综杆分别与第一升降杆和第二升降杆的端部铰接。
在本发明的一个实施例中，还包括综框推杆限位块，所述第一推综杆和第二推综杆从所述综框推杆限位块中穿过，通过综框推杆限位块限制第一推综杆和第二推综杆的移动方向，使第一综框和第二综框始终处于竖直状态。
本发明的上述技术方案相比现有技术具有以下优点：
本发明所述的织机开口机构，与传统的连杆开口机构不同，本机构的综框运动是由一个特殊四连杆机构生成的特殊连杆曲线导引，由这条连杆曲线导引的织机开口运动可以解决现有开口机构的两大问题：
(1)被导引的综框能在上、下两个极限位置实现短暂停歇，有利于延长引纬的距离，从而彻底解决传统连杆开口机构没有真正静止期的问题，拓宽了连杆开口机构在机织领域的应用范围；
(2)综框运动规律曲线变化均匀，可使经纱运动变得更加平稳，而在梭口满开时速度为零，加速度为零，可使纱线缓慢伸长至极限值，解决了凸轮机构需要通过加大凸轮的加工精度才能实现运动曲线高阶连续的问题。
附图说明
为了使本发明的内容更容易被清楚地理解，下面根据本发明的具体实施例并结合附图，对本发明作进一步详细的说明，其中
图1是本发明的织机开口机构的整体结构示意图；
图2是本发明的织机开口机构的连杆驱动组件的结构示意图；
图3是本发明的织机开口机构的综框曲线导引组件的结构示意图；
图4是本发明的织机开口机构的框升降动力传递组件的结构示意图；
图5是本发明的织机开口机构的整体侧面结构示意图；
图6是本发明的织机开口机构的综框曲线导引组件运动周期结构示意图；
图7是本发明的织机开口机构的综框运动规律曲线图；
说明书附图标记说明：1、第一综框；2、第二综框；3、连杆驱动组件；31、曲柄；32、连杆；33、摇杆；34、机架杆；4、综框曲线导引组件；41、连接杆；42、滑块；43、导槽推杆；5、综框升降动力传递组件；51、双臂杆；52、第一升降杆；53、第二升降杆；54、第一推综杆；55、第二推综杆；56、综框推杆限位块。
具体实施方式
下面结合附图和具体实施例对本发明作进一步说明，以使本领域的技术人员可以更好地理解本发明并能予以实施，但所举实施例不作为对本发明的限定。
参照图1所示，本发明的一种织机开口机构，包括第一综框1、第二综框2、连杆驱动组件3、综框曲线导引组件4、综框升降动力传递组件5；所 述连杆驱动组件3采用特殊的四连杆机构生成一条特殊连杆曲线，通过综框曲线导引组件4实现由这条特殊连杆曲线导引的第一综框1间歇性的上下移动，最后通过综框升降动力传递组件5，将第一综框1的运动传递到第二综框2，并使第二综框2的运动方向与第一综框1的运动方向相反。
参照图2所示，所述连杆驱动组件3包括曲柄31、连杆32、摇杆33和机架杆34，所述曲柄31一端固定，另一端在动力源的带动下作匀速圆周运动，所述曲柄31的固定端与机架杆34铰接，所述曲柄31的运动端与连杆32铰接，所述摇杆33两端分别与连杆32和机架杆34铰接，所述曲柄31、连杆32、摇杆33和机架杆34首尾相接形成闭合的环状结构；
具体地，所述连杆驱动组件3中的曲柄31、连杆32、摇杆33和机架杆34的杆长比例关系为1：2：2：2.7603。
参照图3所示，所述综框曲线导引组件4包括连接杆41、滑块42、导槽推杆43，所述连接杆41的一端与连杆32固定连接，所述连接杆41的另一端与滑块42铰接，所述导槽推杆43水平设置，所述导槽推杆43内设置有供滑块42滑动的滑槽，所述连杆驱动组件4通过连接杆41带动滑块42作对称曲线运动，进而带动导槽推杆43及第一综框1间歇性上下移动；
具体地，所述综框曲线导引组件4中的连接杆41与所述连杆驱动组件3中连杆32长度相等，所述连接杆41与连杆32之间的夹角为54.8385°。
在满足上述设置条件后，所述滑块42的运动轨迹是一条对称连杆曲线，所述对称连杆曲线为6阶连续闭合曲线，为长圆形，包括两段对称的曲线运动轨迹及两段处于水平位置的近似直线运动轨迹，所述滑块42在沿曲线运动轨迹运动时，带动所述导槽推杆43上下运动，所述滑块42在沿近似直线运动轨迹运动时，所述导槽推杆43处于静止状态，两段近似直线的运动轨迹分别位于运动轨迹的最高点和最低点。
参照图4所示，所述综框升降动力传递组件5包括双臂杆51和铰接在双臂杆51两端的第一升降杆52和第二升降杆53，所述第一升降杆52和第二升降杆53分别带动第一综框1和第二综框2作升降运动，所述第一综 框1上升时通过双臂杆51将动力传递到第二综框2，带动第二综框2下降，所述第一综框1下降时通过双臂杆51将动力传递到第二综框2，带动第二综框2上升；
所述第一综框1和第二综框2分别包括延伸设置的第一推综杆54和第二推综杆55，所述第一推综杆54与导槽推杆43连接，所述第一升降杆52和第二升降杆53分别铰接在第一推综杆54和第二推综杆55上；
所述综框升降动力传递组件5还包括综框推杆限位块56，所述第一推综杆54和第二推综杆55从所述综框推杆限位块56中穿过，通过综框推杆限位块56限制第一推综杆54和第二推综杆55的移动方向，使第一综框1和第二综框2始终处于竖直状态。
参照图5所示，所述第一综框1和第二综框2均设置有多个经纱综眼，纱线从所述经纱综眼中穿过，穿过所述第一综框1和第二综框2的纱线形成两个经纱层，所述第一综框1和第二综框2在连杆驱动组件3、综框曲线导引组件4、综框升降动力传递组件5带动下作方向相反的上下往复运动，当第一综框1上的经纱层上升至最高位置时，第二综框2上的经纱层下降至最低位置，两个经纱层之间形成梭口；
织造平纹织物的开口机构，按上下两层经纱交替的工艺要求，织机主轴每转一次，完成一次开口运动，织机主轴每转两次，即所述曲柄31转一次，综框完成一个运动周期，一次开口运动分为三个阶段：①开口阶段：经线由经位置线到梭口满开位置；②静止阶段：经线处于梭口满开位置；③闭口阶段：经线由梭口满开位置返回至经位置线；三个阶段对应的综框运动时间分配设计因织物不同有所差异。
参照图6所示，所述曲柄31作匀速圆周运动，当所述曲柄31与机架杆34垂直时近似为综平时间，得到综框的运动规律如图7所示，综框的位移图显示静止时间接近120°，完全符合绝大多数织机的工艺要求，另外，梭口满开时综框速度为零，综平时速度为最大，加速度在满开时为零，所呈现的运动规律曲线连续性好。
本实施例的织机开口机构，四连杆机构属于低副机构，制造成本低，不易磨损，并且能满足开口运动三个阶段(开口、静止、闭口)的工艺要求，而且时间分配合理，同时能满足综框运动连续性要求，速度在综平时最大，满开时为零；开口终了和闭口开始瞬间加速度为零，并且整个运动周期加速度变化均匀，高阶连续，从而解决了综框运动的平稳性问题。
显然，上述实施例仅仅是为清楚地说明所作的举例，并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。

Claims (9)

  1. 一种织机开口机构，其特征在于，包括第一综框、第二综框、连杆驱动组件、综框曲线导引组件、综框升降动力传递组件；
    所述连杆驱动组件包括曲柄、连杆、摇杆和机架杆，所述曲柄一端固定，另一端在动力源的带动下作圆周运动，所述曲柄的固定端与机架杆铰接，所述曲柄的运动端与连杆铰接，所述摇杆两端分别与连杆和机架杆铰接，所述曲柄、连杆、摇杆和机架杆首尾相接形成闭合的环状结构；
    所述综框曲线导引组件包括连接杆、滑块、导槽推杆，所述连接杆的一端与连杆固定连接，所述连接杆的另一端与滑块铰接，所述导槽推杆水平设置，所述导槽推杆内设置有供滑块滑动的滑槽，所述连杆驱动组件通过连接杆带动滑块作对称曲线运动，带动导槽推杆和第一综框间歇性上下移动；
    所述综框升降动力传递组件将第一综框的运动传递到第二综框，并使第二综框的运动方向与第一综框的运动方向相反。
  2. 根据权利要求1所述的织机开口机构，其特征在于：所述连杆驱动组件中的曲柄、连杆、摇杆和机架杆的杆长比例关系为1：2：2：2.7603。
  3. 根据权利要求1所述的织机开口机构，其特征在于：所述综框曲线导引组件中的连接杆与所述连杆驱动组件中连杆长度相等。
  4. 根据权利要求1所述的织机开口机构，其特征在于：所述对称曲线运动轨迹为6阶连续闭合曲线，其运动轨迹包括两段对称的曲线运动轨迹及两段处于水平位置的近似直线运动轨迹。
  5. 根据权利要求4所述的织机开口机构，其特征在于：所述滑块在沿曲线运动轨迹运动时，带动所述导槽推杆上下运动，所述滑块在沿近似直线运动轨迹运动时，所述导槽推杆处于静止状态。
  6. 根据权利要求5所述的织机开口机构，其特征在于：两段近似直线 运动轨迹分别位于运动轨迹的最高点和最低点。
  7. 根据权利要求1所述的织机开口机构，其特征在于：所述综框升降动力传递组件包括双臂杆和铰接在双臂杆两端的第一升降杆和第二升降杆，所述第一升降杆和第二升降杆分别带动第一综框和第二综框作升降运动，所述第一综框上升时通过双臂杆将动力传递到第二综框，带动第二综框下降，所述第一综框下降时通过双臂杆将动力传递到第二综框，带动第二综框上升。
  8. 根据权利要求7所述的织机开口机构，其特征在于：所述第一综框和第二综框分别包括延伸设置的第一推综杆和第二推综杆，所述第一推综杆与导槽推杆固定连接，所述第一推综杆和第二推综杆分别与第一升降杆和第二升降杆的端部铰接。
  9. 根据权利要求8所述的织机开口机构，其特征在于：还包括综框推杆限位块，所述第一推综杆和第二推综杆从所述综框推杆限位块中穿过，通过综框推杆限位块限制第一推综杆和第二推综杆的移动方向，使第一综框和第二综框始终处于竖直状态。
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