Upper head changing cutting-free automatic push-out mechanism with telescopic claws and fixed claws arranged in crossed mode

Abstract

The utility model relates to the technical field of glass fiber kiln wire drawing equipment, in particular to an upper head changing cutting-free automatic push-out mechanism with telescopic claws and fixed claws arranged in a crossed mode. The upper head changing cutting-free automatic pushing-out mechanism comprises a machine head main shaft, an upper head changing yarn pushing assembly seat, a yarn pushing mechanism and a telescopic claw mechanism. According to the upper head changing cutting-free automatic pushing-out mechanism with the telescopic claws and the fixed claws arranged in the crossed mode, through mutual cooperation of the machine head main shaft, the upper head changing yarn pushing assembly base, the yarn pushing mechanism and the telescopic claw mechanism, automatic head feeding, cylinder changing and yarn breaking of a wire drawing machine can be achieved; the transition yarn formed in the upper end changing process can be automatically pushed out and recycled in a whole circle; the labor intensity is reduced, the automation degree is improved, and the safety condition of man-machine cooperation is improved; meanwhile, the recovery value of the transition yarn can be improved, and the broken wool yarn is prevented from polluting the environment.

Description

Technical Field

[0001] The present application relates to the technical field of glass fiber kiln wire drawing equipment, and in particular to an upper head changing head cutting-free automatic ejection mechanism in which telescopic claws and fixed claws are cross-arranged. Background Art

[0002] As a composite reinforcing material, glass fiber has a wide range of applications and comes in a variety of varieties. It can be directly drawn into cylindrical yarn balls through a wire drawing machine or drawn into horse-shaped yarn balls through a wire cake drawing machine.

[0003] In the current fiberglass kiln drawing process, the full-bobbin replacement and automatic head loading of the wire drawing machine are achieved by winding the yarn on the upper wire ring through a V-groove plus a wire hook or an upper wire ring with a threaded groove plus a wire hook. This is also a more superior upper wire ring structure in recent years. However, the yarn left on the upper wire ring is difficult to remove by the robot. It must be cut and cleared manually on site before the robot can complete the yarn removal work. Such human-machine cooperation has safety hazards and cannot achieve automated continuous production.

[0004] With the progress of society, harsh working environment and operational safety have become top priorities. Now we have entered the era of intelligent manufacturing. It is imperative to use closed fully automatic robots to replace manual operations in the wire drawing area, and to save energy and reduce consumption to improve production efficiency. In order to solve the problem of how to improve the utilization value of waste yarn and unmanned automation, the cutting and removal of yarn left on the upper wire ring must be broken through to achieve the upgrade of existing equipment, realize the automated production operation of unmanned pushing out the whole circle of waste yarn, improve the overall performance and efficiency of existing wire drawing machines, and increase the residual value of waste yarn to achieve significant economic benefits.

[0005] The upper wire ring and upper wire hook are components set on the head spindle of the wire drawing machine to complete the automatic head change, and are generally set at the end of the head spindle of the wire drawing machine. The glass fiber from the wire drawing machine is first captured by the upper wire hook and wound on the upper wire ring, and then the glass fiber is pushed to the winding area on the head spindle for winding through a mechanism similar to a wire push rod. Since the head spindle of the wire drawing machine is constantly rotating during the process from when the glass fiber is captured by the upper wire hook to when it is pushed to the winding area, some transition yarns will be formed on the upper wire ring during the above-mentioned automatic head change. The finished yarn balls or silk cakes are wound in the winding area on the head spindle, but these yarn balls or silk cakes must be treated before the transition yarn on the upper wire ring is removed. For the processing of transition yarn, it is currently completed by manual operation on the production line, and the operator manually cuts and removes the transition yarn with a tool, which not only causes safety hazards and hinders the automation process, but also produces a lot of waste yarn and hairy yarn to pollute the environment. The prior art has not disclosed a solution that can effectively and automatically process the transition yarn and enhance the value of the transition yarn.

[0006] The technical documents related to this application are:

[0007] Chinese patent application: Wire drawing machine, machine head and control method for automatic head change and yarn pushing of cut-free yarn, application number 202410924255.0, involving an automatic head change and yarn pushing scheme using a transition ring. Utility Model Content

[0008] In view of this, the present application provides an upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws to solve all or part of the technical problems described in the background technology section of the present application.

[0009] The present application provides an upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws to solve the technical problem:

[0010] The upper head-changing cutting-free automatic ejection mechanism with the telescopic claws and the fixed claws arranged crosswise comprises a machine head main shaft, on which a telescopic claw air circuit and a telescopic claw piston chamber are arranged; the telescopic claw air circuit is connected to the telescopic claw piston chamber;

[0011] The upper head-changing cutting-free automatic ejection mechanism in which the telescopic claws and the fixed claws are arranged crosswise also includes an upper head-changing yarn pushing assembly seat, on which a base plate and a telescopic cavity are arranged, and on which a fixed claw and a telescopic claw telescopic position are arranged, and the base plate is fixedly arranged on the main shaft of the machine head;

[0012] The upper head-changing cutting-free automatic ejection mechanism in which the telescopic claws and the fixed claws are arranged crosswise also includes a telescopic claw mechanism; the telescopic claw mechanism includes a telescopic claw piston rod, a telescopic claw driving seat, a telescopic claw, and a telescopic reset spring;

[0013] The telescopic claw piston rod is arranged in the telescopic claw piston cavity, the telescopic claw driving seat is fixedly arranged on the telescopic claw piston rod and is located in the telescopic cavity; the telescopic claw is nested on the telescopic claw driving seat and is located in the telescopic position of the telescopic claw;

[0014] When compressed air is supplied to the telescopic claw air circuit, the telescopic claw driving seat can move forward in the axial direction under the action of the telescopic claw piston rod, and the telescopic claw can contract in the radial direction; when the compressed air in the telescopic claw air circuit is cut off, the telescopic claw driving seat can move backward in the axial direction under the action of the telescopic return spring, and the telescopic claw can extend in the radial direction.

[0015] Preferably, the fixed claws and the telescopic claws are evenly and spaced apart around the axis of the base plate, the diameter of the telescopic claw after extension is larger than the diameter of the fixed claw, and the diameter of the telescopic claw after contraction is smaller than the diameter of the fixed claw.

[0016] As a preferred embodiment, a yarn pushing air path and a yarn pushing piston cavity are also provided on the main shaft of the machine head; the yarn pushing air path is connected to the yarn pushing piston cavity; a vertical yarn pushing passage is also provided on the upper head changing yarn pushing assembly seat; the upper head changing cutting-free automatic pushing mechanism in which the telescopic claws and the fixed claws are arranged crosswise also includes a yarn pushing mechanism; the yarn pushing mechanism includes a yarn pushing piston rod, a vertical yarn pushing rod, and a yarn pushing return spring; the yarn pushing piston rod is arranged in the yarn pushing piston cavity; the vertical yarn pushing rod is fixedly arranged on the yarn pushing piston rod and is located in the vertical yarn pushing passage;

[0017] When compressed air is supplied into the yarn pushing air path, the vertical yarn pushing rod can move forward axially under the action of the yarn pushing piston rod; when the compressed air in the yarn pushing air path is cut off, the yarn pushing piston rod can move backward axially under the action of the yarn pushing return spring, and the vertical yarn pushing rod can be retracted backward along the vertical yarn pushing aisle.

[0018] Preferably, a telescopic claw assembly portion is provided on the telescopic claw drive seat, and a bevel drive groove, a sliding slot, and a slot limit portion are provided on the telescopic claw assembly portion; a winding portion and a drive head are provided on the telescopic claw, and the drive head includes a drive matching bevel and a drive limit portion; the drive head is arranged in the bevel drive groove, the drive limit portion and the slot limit portion cooperate with each other, and the drive matching bevel and the bevel groove bottom of the bevel drive groove cooperate with each other.

[0019] Preferably, a telescopic claw positioning groove is further provided on the upper head-changing yarn pushing assembly seat, and the telescopic claw positioning groove is connected to the telescopic position of the telescopic claw; a positioning part is also provided on the telescopic claw, and the structures and sizes of the positioning part and the telescopic claw positioning groove are consistent with each other.

[0020] Preferably, the telescopic claw mechanism further comprises a connection limiting component, which is fixedly connected to the upper head-changing yarn pushing assembly seat; and the driving head is arranged between the connection limiting component and the base plate.

[0021] Preferably, a vertical yarn pushing matching passage is provided on the telescopic claw driving seat, and the vertical yarn pushing rod is located in the vertical yarn pushing passage and the vertical yarn pushing matching passage; the telescopic claw driving seat is also provided with a yarn pushing matching shaft hole, and the yarn pushing matching shaft hole is used to assemble the yarn pushing piston rod.

[0022] Preferably, the vertical yarn pushing passage and the telescopic claw telescopic positions are evenly and spaced apart around the axis of the base plate.

[0023] Preferably, the surface of the telescopic claw is a toothed surface, and the surface of the fixed claw is a smooth surface.

[0024] Preferably, the vertical yarn pushing rod comprises a vertical pushing rod seat and vertical pushing rods evenly distributed around the vertical pushing rod seat.

[0025] Preferably, the upper head-changing yarn pushing assembly seat is further provided with a yarn pushing shaft hole and a telescopic shaft hole; the yarn pushing shaft hole and the telescopic shaft hole are used to assemble a yarn pushing piston rod and a telescopic claw piston rod respectively.

[0026] Preferably, the yarn pushing mechanism further comprises a yarn pushing cylinder cover, the yarn pushing piston rod comprises a yarn pushing rod portion and a yarn pushing piston portion; the yarn pushing cylinder cover is arranged at the opening portion of the yarn pushing piston cavity, and the yarn pushing return spring is arranged between the yarn pushing piston portion and the yarn pushing cylinder cover.

[0027] Preferably, the telescopic claw mechanism also includes a telescopic claw cylinder cover, and the telescopic claw piston rod includes a telescopic rod portion and a telescopic piston portion; the telescopic claw cylinder cover is arranged at the opening portion of the telescopic claw piston chamber, and the telescopic return spring is arranged between the telescopic piston portion and the telescopic claw cylinder cover.

[0028] Preferably, the yarn pushing return spring and the telescopic return spring may also be replaced by spring sheets.

[0029] Preferably, the main shaft of the machine head is also provided with a double air path pipe, a yarn pushing air inlet, and a telescopic claw air inlet; the double air path pipe is arranged in the yarn pushing air path. The double air path pipe is provided with a central air path, a yarn pushing air groove, and a telescopic claw air groove, the yarn pushing air groove and the telescopic claw air groove are isolated from each other, and the yarn pushing air groove is connected to the central air path; the yarn pushing air inlet is connected to the yarn pushing air groove, and the telescopic claw air inlet is connected to the telescopic claw air groove. The central air path is connected to the yarn pushing piston chamber. The telescopic claw air groove is connected to the telescopic claw air path.

[0030] Preferably, the yarn pushing mechanism further comprises a buffer flow limiting valve, which is arranged on a side of the yarn pushing piston portion different from the yarn pushing rod portion. When the buffer flow limiting valve on the yarn pushing piston rod enters the connecting portion between the yarn pushing air path and the yarn pushing piston cavity, the compressed air in the yarn pushing piston cavity is emptied through the buffer flow limiting valve, thereby avoiding the rigid fit between the yarn pushing piston portion and the yarn pushing piston cavity.

[0031] The control method of the upper head-changing automatic ejection mechanism in which the telescopic claws and the fixed claws are arranged crosswise in the present application is as follows:

[0032] In the head-up step, the compressed air of the yarn-pushing air circuit and the telescopic claw air circuit is cut off, the telescopic claw is in an extended state under the action of the telescopic return spring, and the yarn-pushing piston rod and the vertical yarn-pushing rod are in the initial position under the action of the yarn-pushing return spring; the yarn is first pulled and wound on the rotating telescopic claw, and then pushed to the winding area of ​​the head spindle for drawing and winding;

[0033] In the head changing step, when the bobbin is full, the yarn is pushed to the telescopic claw and wound on the telescopic claw; after the full bobbin head and the empty bobbin head are exchanged, the yarn is pushed to the winding area of ​​the empty bobbin head to continue drawing and winding;

[0034] Full bobbin yarn breaking step, cutting off the connection between the transition yarn and the yarn ball;

[0035] The yarn pushing action steps are as follows: the compressed air of the telescopic claw air circuit is turned on, and the telescopic claw retracts under the action of the telescopic claw piston rod, so that the telescopic claw is lower than the surface of the fixed claw; the compressed air of the yarn pushing air circuit is turned on, and the vertical yarn pushing rod is pushed forward under the action of the yarn pushing piston rod, pushing the transition yarn out of the fixed claw; then the compressed air of the yarn pushing air circuit is cut off, and the vertical yarn pushing rod returns to the initial position;

[0036] The resetting step of the telescopic claw is to cut off the compressed air of the telescopic claw air circuit, and the telescopic claw performs an extension movement under the action of the telescopic reset spring. The diameter of the telescopic claw after extension is larger than the diameter of the fixed claw, and the telescopic claw is reset to the initial state.

[0037] Beneficial technical effects:

[0038] 1. The automatic upper head-changing cutting-free ejection mechanism and control method thereof provided in the present application, in which the telescopic claws and the fixed claws are cross-arranged, can realize the automatic head-changing, bobbin-changing and yarn-breaking of the wire drawing machine through the cooperation of the machine head main shaft, the upper head-changing yarn-pushing assembly seat, the yarn-pushing mechanism and the telescopic claw mechanism, and can also automatically eject the transition yarn formed in the upper head-changing process in a whole circle for recycling, so that the yarn unloading robot can realize barrier-free yarn taking; it is conducive to reducing labor intensity, increasing the degree of automation and improving the safety of human-machine cooperation; at the same time, it can also increase the recycling value of the transition yarn and prevent the environment from being polluted by broken wool yarn.

[0039] 2. The upper head-changing automatic ejection mechanism adopts a cross-configuration of smooth fixed claws and toothed surface telescopic claws. The telescopic claws can be automatically extended and retracted by cutting off or conducting the compressed air, so that the telescopic claws can be higher than the fixed claws during the upper head change, and the toothed surface of the telescopic claws can efficiently capture the glass fiber. When pushing the yarn, the telescopic claws are lower than the fixed claws, so that the smooth surface of the fixed claws carries the transition yarn to reduce the resistance when pushing the yarn and avoid damaging the transition yarn loop.

[0040] The technical solution and technical effects of the present application are described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 : Schematic diagram of the overall assembly structure of the upper head-changing cutting-free automatic ejection mechanism with cross-arranged telescopic claws and fixed claws;

[0042] Figure 2 : Exploded view of the light structure of the upper head-changing automatic ejection mechanism without cutting, with the telescopic claws and the fixed claws arranged crosswise;

[0043] Figure 3 : Schematic diagram of the heavy structure of the upper head-changing automatic ejection mechanism without cutting, with the telescopic claws and the fixed claws arranged crosswise, from the first perspective;

[0044] Figure 4: Schematic diagram of the second perspective of the heavy structure explosion diagram of the upper head-changing head-changing head automatic ejection mechanism with cross-arranged telescopic claws and fixed claws;

[0045] Figure 5 : Perspective view of the machine head spindle structure;

[0046] Figure 6 : Coordination diagram of the upper head-changing automatic ejection mechanism components with the telescopic claws and the fixed claws arranged crosswise;

[0047] Figure 7 : Schematic diagram of the double gas pipe structure;

[0048] Icon Description:

[0049] 10-Main spindle,

[0050] 110-yarn pushing air circuit, 120-retractable claw air circuit, 130-yarn pushing piston chamber, 140-retractable claw piston chamber;

[0051] 150-dual air pipe, 160-yarn push air inlet, 170-telescopic claw air inlet;

[0052] 1510-central air path, 1520-yarn pushing air slot, 1530-retractable claw air slot;

[0053] 20-upper head-changing yarn pushing assembly seat;

[0054] 210-base plate, 220-telescopic cavity, 230-fixed claw, 240-vertical yarn pushing passage, 250-telescopic claw telescopic position;

[0055] 260- telescopic claw positioning groove, 270- yarn pushing shaft hole, 280- telescopic shaft hole;

[0056] 30-yarn pushing mechanism;

[0057] 310-yarn pushing piston rod, 320-vertical yarn pushing rod, 330-yarn pushing return spring, 340-yarn pushing cylinder cover, 350-buffer flow limiting valve;

[0058] 3110-yarn pushing rod part, 3120-yarn pushing piston part;

[0059] 3210-vertical push rod seat, 3220-vertical push rod;

[0060] 40- telescopic claw mechanism;

[0061] 410- telescopic claw piston rod, 420- telescopic claw driving seat, 430- telescopic claw, 440- telescopic return spring;

[0062] 450- telescopic claw cylinder cover, 460- connection limit component;

[0063] 4110-telescopic rod part, 4120-telescopic piston part;

[0064] 4210- telescopic claw assembly, 4220- inclined driving groove, 4230- sliding notch;

[0065] 4240-notch limiting part, 4250-vertical yarn pushing matching passage, 4260-yarn pushing matching shaft hole;

[0066] 4310 - winding part, 4320 - driving head, 4321 - driving matching slope, 4322 - driving limiting part, 4330 - positioning part. DETAILED DESCRIPTION

[0067] Terminology: The existing wire drawing machine generally includes a wire drawing machine body, a head turntable and two heads arranged on the head turntable (please refer to the Chinese patent: Slow-pull automatic head-on online cut-free yarn transition yarn feeding mechanism / 201922235065.5 Figure 1 ). The machine head includes a machine head spindle. When winding, first fix the paper tube for winding yarn on the machine head spindle, then connect the glass fiber to the paper tube, and the machine head spindle rotates to wind the glass fiber onto the paper tube to form a yarn ball or yarn cake. When the paper tube being wound is full of glass fiber (full tube), the machine head turntable rotates to replace the paper tube that has not been wound (empty tube) to the winding position to continue winding. The full tube yarn ball or yarn cake is removed by a robot or manually to enter the next process.

[0068] The process of connecting the glass fiber to the empty paper tube at the beginning is called head-on in this application, and the process of exchanging the positions of the empty tube and the full tube by rotating the head turntable is called head changing or tube changing in this application. The head changing in this application refers to the two operations of head-on and head changing.

[0069] When the empty bobbin is put on, in the prior art, the yarn is wound on the upper wire ring by adding a wire hook through a V-shaped groove or an upper wire ring with a thread groove and a wire hook, and then the glass fiber is pushed to the winding area of ​​the winding paper bobbin by a wire push rod. During the process, part of the transition yarn will be formed on the upper wire ring due to the rotation of the main shaft of the machine head, and there will be a connection line between the transition yarn and the finished yarn group.

[0070] The present application discloses an automatic head-changing cutting-free ejection mechanism with cross-arranged telescopic claws and fixed claws and a control method thereof, which is a special device for automatically completing the head-changing, head-changing and yarn-pushing operations of a wire drawing machine.

[0071] Position description: One end of the machine head spindle is assembled to the wire drawing machine body, and the other end is assembled with the upper head change-over and cutting-free automatic ejection mechanism of this application. Figure 1As shown, the "front" in this application refers to the direction away from the main shaft of the machine head along the axial direction of the main shaft of the machine head at one end of the main shaft of the machine head equipped with the automatic ejection mechanism for upper head change without cutting, and the "rear" direction in this application is opposite to the "front" direction. Forward or backward refers to movement in the corresponding direction.

[0072] See also Figures 1 to 7 The present application discloses an upper head-changing cutting-free automatic ejection mechanism with a cross-arranged telescopic claw and a fixed claw, comprising a machine head main shaft 10, an upper head-changing yarn pushing assembly seat 20, a yarn pushing mechanism 30, and a telescopic claw mechanism 40.

[0073] The head spindle 10 is provided with a yarn pushing air circuit 110, a telescopic claw air circuit 120, a yarn pushing piston chamber 130, a telescopic claw piston chamber 140, a double air circuit tube 150, a yarn pushing air inlet 160, and a telescopic claw air inlet 170; the yarn pushing air circuit 110 is connected to the yarn pushing piston chamber 130, and the telescopic claw air circuit 120 is connected to the telescopic claw piston chamber 140.

[0074] The double air path tube 150 is arranged in the yarn pushing air path 110. The double air path tube 150 is provided with a central air path 1510, a yarn pushing air groove 1520, and a telescopic claw air groove 1530. The yarn pushing air groove 1520 and the telescopic claw air groove 1530 are isolated from each other, and the yarn pushing air groove 1520 is connected to the central air path 1510; the yarn pushing air inlet 160 is connected to the yarn pushing air groove 1520, and the telescopic claw air inlet 170 is connected to the telescopic claw air groove 1530. The central air path 1510 is connected to the yarn pushing piston chamber 130, and the telescopic claw air groove 1530 is connected to the telescopic claw air path 120.

[0075] To prevent air leakage, sealing grooves are provided at both ends of the double air-circuit pipe 150 and between the yarn-pushing air groove 1520 and the telescopic claw air groove 1530, and sealing rings are installed in the sealing grooves.

[0076] The upper head-changing yarn pushing assembly seat 20 is provided with a base plate 210 and a telescopic cavity 220. The base plate 210 is provided with a plurality of fixed claws 230, a vertical yarn pushing passage 240, a telescopic claw telescopic position 250, a telescopic claw positioning groove 260, a yarn pushing shaft hole 270 and a telescopic shaft hole 280. The telescopic claw positioning groove 260 is connected to the telescopic claw telescopic position 250.

[0077] The base plate 210 is fixedly arranged on the machine head spindle 10, and the means of fixed connection can be various feasible solutions in the prior art, such as screw connection, welding, integral molding, interference fit, snap connection, etc. The screw connection method can be to set a screw hole on the machine head spindle 10, set a matching hole on the base plate 210, and fix the base plate 210 to the machine head spindle 10 through common fasteners such as bolts and nuts.

[0078] A plurality of fixed claws 230 are formed on the base plate 210 and are evenly spaced around the axis of the base plate 210 . A telescopic cavity 220 is defined in the middle of the fixed claws 230 . A vertical yarn pushing passage 240 and a telescopic claw telescopic position 250 are formed between the fixed claws 230 . A telescopic claw positioning groove 260 is located at the bottom position of the telescopic claw telescopic position 250 which is adjacent to the base plate 210 .

[0079] The vertical yarn pushing passage 240 and the telescopic claw telescopic position 250 are evenly and spacedly arranged around the axis of the base plate 210. The yarn pushing shaft hole 270 is located in the middle part of the base plate 210, and is used to pass through and accommodate the yarn pushing piston rod 310. The number of the telescopic shaft holes 280 is consistent with the number of the telescopic claw piston chambers 140, and is used to pass through and accommodate the telescopic claw piston rod 410.

[0080] The yarn pushing mechanism 30 includes a yarn pushing piston rod 310, a vertical yarn pushing rod 320, a yarn pushing return spring 330, and a yarn pushing cylinder cover 340. The yarn pushing cylinder cover 340 is arranged at the opening of the yarn pushing piston chamber 130, the yarn pushing piston rod 310 is arranged in the yarn pushing piston chamber 130 and passes through the yarn pushing cylinder cover 340; the vertical yarn pushing rod 320 is fixedly arranged on the yarn pushing piston rod 310 and is located in the vertical yarn pushing passage 230.

[0081] The yarn pushing piston rod 310 includes a yarn pushing rod portion 3110 and a yarn pushing piston portion 3120. The yarn pushing piston portion 3120 is located in the yarn pushing piston chamber 130. The yarn pushing return spring 330 is arranged between the yarn pushing piston portion 3120 and the yarn pushing cylinder cover 340 and is passed through the yarn pushing rod portion 3110. In the embodiment of the present application, the yarn pushing return spring 330 can also adopt various spring pieces.

[0082] The vertical yarn pushing rod 320 comprises a vertical push rod seat 3210 and vertical push rods 3220 evenly distributed around the vertical push rod seat 3210. The vertical push rods 3220 are fixedly assembled to the vertical push rod seat 3210.

[0083] When compressed air is supplied into the yarn pushing air circuit 110, the yarn pushing piston rod 310 can drive the vertical yarn pushing rod 320 forward under the action of the compressed air, and compress the yarn pushing return spring 330 at the same time; when the compressed air of the yarn pushing air circuit 110 is cut off, the yarn pushing piston rod 310 can be retracted backward along the vertical yarn pushing passage 240 under the action of the yarn pushing return spring 330.

[0084] In a modified embodiment of the present application, the yarn pushing mechanism further includes a buffer flow limiting valve 350, which is arranged on a side of the yarn pushing piston portion 3120 different from the yarn pushing rod portion 3110. When the buffer flow limiting valve 350 on the yarn pushing piston rod 310 enters the connecting portion between the yarn pushing air path 110 and the yarn pushing piston cavity 130, the compressed air in the yarn pushing piston cavity 130 is exhausted through the buffer flow limiting valve 350, which can avoid the rigid fit between the yarn pushing piston portion 3120 and the bottom of the yarn pushing piston cavity 130.

[0085] The telescopic claw mechanism 40 includes a telescopic claw piston rod 410, a telescopic claw driving seat 420, a telescopic claw 430, a telescopic return spring 440, a telescopic claw cylinder cover 450, and a connection limit component 460. The telescopic claw piston rod 410 includes a telescopic rod portion 4110 and a telescopic piston portion 4120.

[0086] The telescopic claw cylinder cover 450 is arranged at the opening part of the telescopic claw piston chamber 140, the telescopic claw piston rod 410 is arranged in the telescopic claw piston chamber 140 and passes through the telescopic claw cylinder cover 450, the telescopic claw driving seat 420 is fixedly arranged on the telescopic claw piston rod 410 and is located in the telescopic chamber 220; the telescopic claw 430 is nested on the telescopic claw driving seat 420 and is located in the telescopic position 250 of the telescopic claw; the telescopic return spring 440 is arranged between the telescopic piston part 4120 and the telescopic claw cylinder cover 450 and passes through the telescopic rod part 4110.

[0087] The telescopic claw drive seat 420 is fixedly arranged on the telescopic claw piston rod 410, and the means of fixed connection can be various feasible solutions in the prior art, such as screw connection, welding, integral molding, interference fit, snap connection, etc. The screw connection method can be to set a screw hole on the telescopic claw piston rod 410, set a matching hole on the telescopic claw drive seat 420, and fix the telescopic claw drive seat 420 to the telescopic claw piston rod 410 through common fasteners such as bolts and nuts.

[0088] The telescopic claw drive seat 420 is provided with a telescopic claw assembly part 4210, and the telescopic claw assembly part 4210 is provided with an inclined driving groove 4220, a sliding notch 4230 and a notch limiter 4240. The telescopic claw drive seat 420 is also provided with a vertical yarn pushing matching passage 4250 and a yarn pushing matching shaft hole 4260. The vertical yarn pushing matching passage 4250 and the vertical yarn pushing passage 240 are in the same orientation, and the vertical yarn pushing rod 320 is located in the vertical yarn pushing passage 240 and the vertical yarn pushing matching passage 4250. The yarn pushing matching shaft hole 4260 is located in the middle part of the telescopic claw drive seat 420, and the yarn pushing piston rod 310 passes through and is accommodated in the yarn pushing shaft hole 270 and the yarn pushing matching shaft hole 4260.

[0089] The telescopic claw 430 is provided with a winding portion 4310, a driving head 4320, and a positioning portion 4330. The driving head 4320 includes a driving matching inclined surface 4321 and a driving limiting portion 4322. The driving head 4320 is arranged in the inclined driving groove 4220, the driving limiting portion 4322 and the slot limiting portion 4240 cooperate with each other, and the driving matching inclined surface 4321 and the inclined groove bottom of the inclined driving groove 4220 cooperate with each other. The connecting limiting component 460 is fixedly connected to the upper head-changing yarn pushing assembly seat 20, and the driving head 4320 is assembled in the inclined driving groove 4220 and is located between the connecting limiting component 460 and the base plate 210.

[0090] The structures and sizes of the positioning portion 4330 and the telescopic claw positioning groove 260 match each other. When the telescopic claw driving seat 420 moves backward along the axial direction of the head spindle 10 under the action of the telescopic return spring 440, the positioning portion 4330 gradually enters the telescopic claw positioning groove 260.

[0091] Compressed air is supplied to the telescopic claw air circuit 120, and the telescopic claw piston rod 410 drives the telescopic claw driving seat 420 to move forward along the axis, and the inclined driving groove 4220 leaves the driving matching inclined surface 4321 of the telescopic claw 430. After losing support, the telescopic claw 430 contracts radially to facilitate the pushing out of transition yarn and loading and unloading of yarn tubes; when the compressed air of the telescopic claw air circuit 120 is cut off, the telescopic claw driving seat 420 can move backward in the axial direction under the action of the telescopic return spring 440, and at the same time, the telescopic claw 430 is pulled to stretch radially through the inclined driving groove 4220 to facilitate the loading and changing of the tube.

[0092] Description of the yarn pushing and telescopic action: When the compressed air enters the telescopic claw piston chamber 140 through the telescopic claw air circuit 120, the telescopic claw piston rod 410 drives the telescopic claw driving seat 420 to move forward along the axis, and the telescopic claw 430 immediately contracts radially after losing support; when the compressed air enters the yarn pushing piston chamber 130 through the yarn pushing air circuit 110, the yarn pushing piston rod 310 drives the vertical yarn pushing rod 320 forward under the action of the compressed air. Due to the use of the independently controllable dual air circuit configuration, the completion order of the yarn pushing and telescopic claw telescopic actions can be flexibly controlled as needed, for example, the telescopic claw 430 contracts first, and then the vertical yarn pushing rod 320 is pushed forward, and so on. Correspondingly, when the compressed air in the telescopic claw air circuit 120 is cut off, the compressed air in the telescopic claw piston chamber 140 is quickly discharged under the action of the telescopic return spring 440, and the telescopic claw 430 immediately extends radially; when the compressed air in the yarn pushing air circuit 110 is cut off, the compressed air in the yarn pushing piston chamber 130 is finally buffered and emptied through the buffer limiting valve 350, so as to avoid the large impulse hitting the bottom of the yarn pushing piston chamber 130 when the yarn pushing piston rod 310 is reset, causing a rigid fit.

[0093] The surface of the telescopic claw 430 in the present application is a toothed surface, and the surface of the fixed claw 230 is a smooth surface. The toothed surface of the telescopic claw 430 is conducive to the attachment or capture of the glass fiber when the head is changed, and the smooth surface of the fixed claw 230 is conducive to reducing the resistance when pushing the yarn. When the telescopic claw 430 is in the extended state, the diameter is larger than the fixed claw 230, and the transition yarn can be efficiently wound on the toothed surface; when the telescopic claw 430 is in the contracted state, the diameter is smaller than the diameter of the fixed claw 230, and the transition yarn is carried on the smooth surface, thereby reducing the resistance to pushing the yarn.

[0094] The control method of the upper head-changing cutting-free automatic ejection mechanism with the telescopic claws and the fixed claws arranged crosswise is:

[0095] In the head-up step, the compressed air of the yarn pushing air circuit 110 and the telescopic claw air circuit 120 is cut off, the telescopic claw 430 is in an extended state under the action of the telescopic return spring 440, and the yarn pushing piston rod 310 and the vertical yarn pushing rod 320 are in an initial position under the action of the yarn pushing return spring 330; the yarn is first pulled and wound on the rotating telescopic claw 430, and then pushed to the winding area of ​​the head spindle 10 for drawing and winding;

[0096] In the head changing step, when the bobbin is full, the yarn is pushed to the telescopic claw position and wound on the telescopic claw 430; after the full bobbin head and the empty bobbin head are exchanged, the yarn is pushed to the winding area of ​​the empty bobbin head to continue drawing and winding;

[0097] Full bobbin yarn breaking step, cutting off the connection between the transition yarn and the yarn ball;

[0098] The yarn pushing action steps are as follows: the compressed air of the telescopic claw air circuit 120 is connected, and the telescopic claw 430 performs a contraction movement under the action of the telescopic claw piston rod 410, so that the telescopic claw 430 is lower than the surface of the fixed claw 230 (that is, the diameter of the telescopic claw 430 after extension is larger than the diameter of the fixed claw 230); the compressed air of the yarn pushing air circuit 110 is connected, and the vertical yarn pushing rod 320 is pushed forward under the action of the yarn pushing piston rod 310, so as to push the transition yarn out of the fixed claw 230; then the compressed air of the yarn pushing air circuit 110 is cut off, and the vertical yarn pushing rod 320 returns to the initial position, and the unloading and winding of the yarn can be operated at this time;

[0099] In the resetting step of the telescopic claw, the compressed air of the telescopic claw air circuit 120 is cut off, and the telescopic claw 430 stretches under the action of the telescopic reset spring 440. The diameter of the telescopic claw 430 after stretching is larger than the diameter of the fixed claw 230, and the telescopic claw 430 is reset to the initial state.

[0100] Description of the prior art: The traction of the yarn can be accomplished by a slow-pull traction mechanism, the raising of the yarn can be accomplished by components or parts such as an upper wire hook, the pushing of the yarn can be accomplished by components or parts or mechanisms such as a wire pusher, and the cutting of the yarn can be accomplished by an automatic yarn cutting mechanism in conjunction with components or parts or structures such as a yarn cutting groove. The background technology part has been explained through citations and will not be repeated here.

[0101] The upper head-changing automatic pushing-out mechanism adopts a cross-configuration of a smooth fixed claw 230 and a toothed surface telescopic claw 430. The telescopic claw 430 can be automatically extended and retracted by cutting off or conducting compressed air; thus, when changing the upper head, the telescopic claw 430 can be higher than the fixed claw 230, and the toothed surface of the telescopic claw 430 can efficiently capture the glass fiber, and when pushing the yarn, the telescopic claw 430 can be lower than the fixed claw 230, so that the smooth surface of the fixed claw 230 carries the transition yarn to reduce the resistance when pushing the yarn, thereby avoiding damage to the transition yarn loop.

[0102] The technical scheme and technical effects of the present application are described in detail above in combination with the drawings and specific embodiments of the specification. It should be noted that technicians in this field can also develop other embodiments on this basis; any simple deformation and equivalent substitution that does not deviate from the innovative concept of the present application are covered by the present application and belong to the scope of protection of this patent.

Claims

1. An automatic ejection mechanism for head change without cutting, in which telescopic claws and fixed claws are arranged crosswise, comprises a head spindle (10), characterized in that: The machine head spindle (10) is provided with a telescopic claw air circuit (120) and a telescopic claw piston chamber (140); the telescopic claw air circuit (120) is connected to the telescopic claw piston chamber (140); The upper head-changing cutting-free automatic ejection mechanism in which the telescopic claws and the fixed claws are arranged crosswise also includes an upper head-changing yarn pushing assembly seat (20), wherein the upper head-changing yarn pushing assembly seat (20) is provided with a base plate (210) and a telescopic cavity (220), and the base plate (210) is provided with a fixed claw (230) and a telescopic claw telescopic position (250), and the base plate (210) is fixedly arranged on the machine head main shaft (10); The upper head-changing cutting-free automatic ejection mechanism in which the telescopic claws and the fixed claws are arranged crosswise also includes a telescopic claw mechanism (40); The telescopic claw mechanism (40) comprises a telescopic claw piston rod (410), a telescopic claw driving seat (420), a telescopic claw (430), and a telescopic return spring (440); The telescopic claw piston rod (410) is arranged in the telescopic claw piston chamber (140); the telescopic claw driving seat (420) is fixedly arranged on the telescopic claw piston rod (410) and is located in the telescopic chamber (220); the telescopic claw (430) is nested on the telescopic claw driving seat (420) and is located in the telescopic claw telescopic position (250); The machine head main shaft (10) is also provided with a yarn pushing air path (110) and a yarn pushing piston chamber (130); the yarn pushing air path (110) is connected to the yarn pushing piston chamber (130); The upper head-changing yarn pushing assembly seat (20) is provided with a vertical yarn pushing passage (240); The upper head-changing cutting-free automatic ejection mechanism in which the telescopic claws and the fixed claws are arranged crosswise also includes a yarn pushing mechanism (30); The yarn pushing mechanism (30) comprises a yarn pushing piston rod (310), a vertical yarn pushing rod (320), and a yarn pushing return spring (330); The yarn pushing piston rod (310) is arranged in the yarn pushing piston chamber (130); the vertical yarn pushing rod (320) is fixedly arranged on the yarn pushing piston rod (310) and is located in the vertical yarn pushing passage (240); The telescopic claw driving seat (420) is provided with a telescopic claw assembly portion (4210), and the telescopic claw assembly portion (4210) is provided with an inclined driving groove (4220), a sliding notch (4230), and a notch limiting portion (4240); The telescopic claw (430) is provided with a winding portion (4310) and a driving head (4320); the driving head (4320) comprises a driving matching inclined surface (4321) and a driving limiting portion (4322); The driving head (4320) is arranged in the inclined driving groove (4220), the driving limiting portion (4322) and the slot limiting portion (4240) cooperate with each other, and the driving matching inclined surface (4321) and the inclined groove bottom of the inclined driving groove (4220) cooperate with each other.

2. The upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws according to claim 1 is characterized in that: The telescopic claw mechanism (40) further comprises a connection limiting component (460), wherein the connection limiting component (460) is fixedly connected to the upper head-changing yarn pushing assembly seat (20); The driving head (4320) is arranged between the connection limiting component (460) and the base plate (210).

3. The upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws according to claim 1 is characterized in that: A vertical yarn pushing matching passage (4250) is provided on the telescopic claw driving seat (420), and the vertical yarn pushing rod (320) is located in the vertical yarn pushing passage (240) and the vertical yarn pushing matching passage (4250); The telescopic claw driving seat (420) is also provided with a yarn pushing matching shaft hole (4260), and the yarn pushing matching shaft hole (4260) is used for assembling the yarn pushing piston rod (310).

4. The upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws according to claim 1 is characterized in that: The surface of the telescopic claw (430) is a toothed surface, and the surface of the fixed claw (230) is a smooth surface.

5. The upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws according to claim 4 is characterized in that: The diameter of the telescopic claw (430) when in an expanded state is greater than the diameter of the fixed claw (230), and the diameter of the telescopic claw (430) when in a contracted state is smaller than the diameter of the fixed claw (230).

6. The upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws according to claim 1, characterized in that: The upper head-changing yarn-pushing assembly seat (20) is also provided with a yarn-pushing shaft hole (270) and a telescopic shaft hole (280); The yarn pushing shaft hole (270) and the telescopic shaft hole (280) are used to assemble the yarn pushing piston rod (310) and the telescopic claw piston rod (410), respectively.

7. The upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws according to claim 1 is characterized in that: The yarn pushing mechanism (30) further comprises a yarn pushing cylinder cover (340); the yarn pushing piston rod (310) comprises a yarn pushing rod portion (3110) and a yarn pushing piston portion (3120); The yarn pushing cylinder cover (340) is arranged at the opening portion of the yarn pushing piston chamber (130), and the yarn pushing return spring (330) is arranged between the yarn pushing piston portion (3120) and the yarn pushing cylinder cover (340).

8. The upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws according to claim 1, characterized in that: The telescopic claw mechanism (40) further comprises a telescopic claw cylinder cover (450); the telescopic claw piston rod (410) comprises a telescopic rod portion (4110) and a telescopic piston portion (4120); The telescopic claw cylinder cover (450) is arranged at the opening portion of the telescopic claw piston chamber (140), and the telescopic return spring (440) is arranged between the telescopic piston portion (4120) and the telescopic claw cylinder cover (450).

9. The upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws according to claim 1, characterized in that: The machine head main shaft (10) is also provided with a double air path tube (150), a yarn pushing air inlet (160), and a telescopic claw air inlet (170); the double air path tube (150) is arranged in the yarn pushing air path (110); The double air path pipe (150) is provided with a central air path (1510), a yarn pushing air groove (1520), and a telescopic claw air groove (1530); the yarn pushing air groove (1520) and the telescopic claw air groove (1530) are isolated from each other; the yarn pushing air groove (1520) is connected to the central air path (1510); the yarn pushing air inlet (160) is connected to the yarn pushing air groove (1520), and the telescopic claw air inlet (170) is connected to the telescopic claw air groove (1530); The central air path (1510) is connected to the yarn pushing piston chamber (130), and the telescopic claw air groove (1530) is connected to the telescopic claw air path (120).

10. The upper head-changing automatic ejection mechanism with cross-arranged telescopic claws and fixed claws according to claim 1, characterized in that: The yarn pushing mechanism (30) further comprises a buffer flow limiting valve (350), wherein the buffer flow limiting valve (350) is arranged on a side of the yarn pushing piston portion that is different from the yarn pushing rod portion.

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