CN113026191A - Traction mechanism for transverse braiding machine - Google Patents
Traction mechanism for transverse braiding machine Download PDFInfo
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- CN113026191A CN113026191A CN202110316905.XA CN202110316905A CN113026191A CN 113026191 A CN113026191 A CN 113026191A CN 202110316905 A CN202110316905 A CN 202110316905A CN 113026191 A CN113026191 A CN 113026191A
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- driving
- traction
- harrow
- rake
- tension spring
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/88—Take-up or draw-off devices for knitting products
- D04B15/90—Take-up or draw-off devices for knitting products for flat-bed knitting machines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The invention relates to a traction mechanism for a transverse braiding machine, which comprises a fixed seat, a tension spring, a limiting element, a traction harrow with a traction hook, a swing arm hinged to the fixed seat and a driving element which is provided with a driving end and an adjusting end and can move up and down; the drawing rake is arranged on the fixed seat in a sliding manner, the upper end and the lower end of the tension spring are respectively connected with the drawing rake and the swing arm, and the limiting element is arranged on a path of the swing arm which swings around the hinge point under the action of the tension spring; the driving end contacts and pushes the traction harrow to move upwards when moving upwards along with the driving element; when the driving end moves downwards along with the driving element, the contact of the driving end and the drawing rake is released, and the drawing rake moves downwards under the combined action of the self weight and the tension of the tension spring; when the adjusting end moves downwards along with the driving element, the adjusting end is contacted with and pushes the swing arm to swing downwards, and the lower end of the tension spring moves downwards. The driving of the traction rake contact type and the use of the sliding type guide structure through the driving end simplify the transmission mechanism, reduce the production cost and increase the tension of the tension spring through the adjusting end contact swing arm.
Description
Technical Field
The invention relates to the technical field of flat knitting machines, in particular to a traction rake for a traction device of a flat knitting machine.
Background
In order to prevent the coil from floating upwards in the weaving process of the flat knitting machine, the knitted fabric needs to be pulled downwards by a pulling device, and at present, a roller device is mainly adopted, and the roller device which rotates in the opposite direction is used for clamping and pulling the knitted fabric downwards. The drawing device is suitable for drawing the whole braided fabric, if the braided fabric needs to be partially drawn, even if a sectional roller is adopted, the drawing effect is poor, waste products are easy to form, and if the braided fabric is complex, such as full-forming braiding, the required drawing effect cannot be achieved.
At present, a traction device adopting a traction rake and a sectional type traction rake device are also arranged, but a transmission mechanism for driving the traction rake to complete the action required by traction is complex in structure, and a corresponding adjusting mechanism for controlling the traction state is also needed, so that the manufacturing cost is high, the installation and maintenance difficulty is large, and the applicability is poor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a traction mechanism of a flat knitting machine, and the traction mechanism is realized by the following technical scheme.
The invention relates to a traction mechanism of a flat knitting machine, which comprises a fixed seat, a tension spring, a limiting element, a traction harrow with a traction hook, a swing arm hinged to the fixed seat and a driving element which is provided with a driving end and an adjusting end and can move up and down; the drawing rake is arranged on the fixed seat in a sliding mode, the upper end and the lower end of the tension spring are respectively connected with the drawing rake and the swing arm, and the limiting element is arranged on a path of the swing arm which swings around the hinge point under the action of the tension spring; when the driving end moves upwards along with the driving element, the driving end is contacted with and pushes the traction rake to move upwards, and the tension spring is stretched to store tension; when the driving end moves downwards along with the driving element, the driving end is disconnected from contacting the traction harrow, and the traction harrow moves downwards under the combined action of self weight and tension of the tension spring; when the adjusting end moves downwards along with the driving element, the adjusting end is in contact with and pushes the swing arm to swing downwards, and the lower end of the tension spring moves downwards to increase the tension of the tension spring.
Furthermore, the driving end of the driving element is arranged below the drawing harrow, and the driving end contacts with the drawing harrow from the lower part to drive the drawing harrow to move upwards; the adjusting end of the driving element is arranged above the swing arm, and the adjusting end is contacted with the swing arm from the upper side to drive the swing arm to swing downwards.
Further, the driving element is a nut; the driving end is arranged at the upper end of the nut, the adjusting end is arranged at least one side of the nut, the end face of the adjusting end faces downwards, and the nut is driven by the rotating screw rod to move up and down.
Furthermore, the driving element is a rack, the driving end is arranged at the upper end of the rack, the adjusting end is arranged on at least one side of the rack, the end face of the adjusting end faces downwards, and the rack is driven by the rotating gear to move up and down.
Furthermore, the limiting element is fixedly arranged or is arranged on the fixed seat in an up-and-down adjustable mode.
Furthermore, the drawing harrow is arranged on the fixed seat in a sliding manner through a guide structure of the guide piece and the guide groove which move relatively.
Furthermore, the guide part consists of two cylindrical pins or two pin shafts which are arranged up and down, and the guide groove at least comprises a straight groove which is vertically arranged and is matched with the two cylindrical pins or the two pin shafts; the guide piece or the guide groove is arranged on the drawing harrow, and the guide groove or the guide piece which is matched with the guide piece or the guide groove is arranged on the fixed seat corresponding to the guide piece or the guide groove of the drawing harrow.
Furthermore, the guide groove also comprises a straight inclined combination groove which is matched with the two cylindrical pins or the two shaft pins and consists of a straight groove and a chute communicated with one end of the straight groove, or a composite groove which is formed by combining the straight groove and the straight inclined combination groove and is arranged along the height direction; when the guide piece moves to the inclined groove from the straight groove in the movement relative to the straight and inclined combined groove, the drawing rake rotates to one side far away from the braided fabric, the drawing hook is separated from the braided fabric, and the drawing is withdrawn; when moving from the inclined groove to the straight groove, the drawing hook rotates to one side close to the braided fabric, the drawing hook hooks the braided fabric, and the braided fabric is drawn downwards.
Furthermore, the traction mechanism further comprises a shield plate, the shield plate is arranged on one side of the fixed seat corresponding to the braided fabric, a long slotted hole matched with the position of the traction hook on the traction rake is formed in the shield plate, the traction hook is hidden in the shield plate through the long slotted hole when the traction rake rotates towards one side far away from the braided fabric, and the traction rake is exposed out of the shield plate through the long slotted hole when rotating towards one side close to the braided fabric.
The device also comprises a control method for controlling the up-and-down movement of the drawing harrow in the drawing mechanism, and is characterized in that: the drawing harrow or the driving unit is provided with a sensor, the sensor generates a detection signal when the driving end is close to or in contact with the drawing harrow, the driving end drives the drawing harrow to move upwards, when the drawing harrow moves upwards to the upper end of a drawing stroke, the driving end moves downwards, if the drawing harrow does not hook the braided fabric, the drawing harrow moves downwards along with the driving end, if the drawing harrow hooks the braided fabric, the drawing harrow is separated from the driving end to be in contact with the driving end to generate a space, the space enables the detection signal to be interrupted, the detection signal is interrupted to judge that the drawing harrow has drawn the braided fabric, and the drawing harrow draws the braided fabric downwards under the.
Further, the sensor is an electromagnetic proximity switch or a travel switch.
The beneficial technical effects of the invention formed by the scheme are as follows:
1) the invention completes the contact type driving action of upward and outward movement of the drawing harrow through the up-and-down movement of the driving element and the guide of the guide structure consisting of the guide piece and the guide groove, can greatly simplify the corresponding driving mechanism for driving the drawing harrow to move, and utilizes the movement of the driving element in different directions to adjust the lower end position of the tension spring so as to adjust the tension of the tension spring, thereby enabling the automatic adjustment of the tension spring and enabling the driving element to play more functions, thereby omitting the corresponding tension spring adjusting mechanism, greatly simplifying the structure of the whole drawing mechanism and having low cost.
2) The invention is provided with the swing arm connected with the lower end of the tension spring, and the lower end of the tension spring is moved by the downward movement of the driving element acting on the swing arm to enable the swing arm to swing downwards, so that the tension of the tension spring is adjusted to adapt to the change of the pulling force required by different fabrics, the adjustment of the tension spring is convenient and can be automatically controlled, thereby meeting the performance and quality requirements of a horizontal knitting machine on different fabrics and ensuring that the adaptability of the knitting machine is good.
3) According to the invention, through the relative position relationship between the drawing harrow and the driving end and by arranging the position sensor on one of the drawing harrow and the driving end, the movement of the drawing harrow is automatically controlled, so that the drawing harrow can continuously move downwards or continuously move downwards between segments to draw braided fabrics, or stop at a height state, or move upwards through the driving end to adjust the downward pulling force of the drawing harrow on the braided fabrics, thereby adapting to different braiding requirements.
Drawings
Fig. 1 is a schematic view of a drive end contact pulling rake in embodiment 1 of the present invention.
Fig. 2 is a right-hand side schematic view of fig. 1 (with the shield plate removed).
Fig. 3 is a schematic view of an adjusting end contact swing arm in embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of a structure of a shield plate in embodiment 1 of the present invention.
Fig. 5 is a schematic view of a drawing device formed of several drawing mechanisms of example 1 of the present invention provided below a needle plate of a flat knitting machine and on one side of a fabric passing path.
Fig. 6 is a schematic structural view of a pulling mechanism of embodiment 2.
Fig. 7 is a view of the pulling mechanism shown in fig. 6 in the direction a (the left tension spring is omitted to show the relationship between the adjustment end of the nut and the swing arm).
Fig. 8 is an enlarged schematic view at C of the pulling mechanism shown in fig. 7.
Fig. 9 is a schematic structural view of a swing arm according to embodiment 2 of the present invention.
Fig. 10 is a schematic structural view of the pulling rake when the pulling rake moves downward from the upper end position in embodiment 2.
Fig. 11 is a schematic structural view of the pulling rake when the pulling rake moves upward in embodiment 2.
FIG. 12 is a schematic view of a drawing device comprising several drawing mechanisms of example 2 of the present invention disposed below a needle plate of a flat knitting machine on both sides of a warp path of a knitted fabric.
FIG. 13 is a schematic view of the structure of a pulling mechanism according to example 3 of the present invention.
In the figure: 1, a drawing mechanism; 101 a guide groove; 101u upper guide groove; 101d lower guide groove; 102 cylindrical pins; 11, drawing a harrow; 111 a pulling seat; 112 pulling the hook; 12 a drive unit; 121 rack gear; 1210 an adjusting end; 1211 drive end; 122 gear wheels; a motor 123; 124 nut; 125 a screw rod; 13, fixing a base; 132 a chute; 133 slotted holes; 14, swinging arms; 141 swing link; 142 connecting ends; 143 a pin shaft; 144 a positioning projection; 145 hinged end; 15 a shield plate; 151 long slotted holes; 16 tension springs; 17 a stop element; 171 a limiting block; a screw 172; 173 connector nut; 8, weaving a fabric; 91 needle boards.
Detailed Description
The pulling mechanism of the present invention will be described in more detail by way of examples with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 2, the pulling mechanism 1 mainly comprises a fixed seat 13, a pulling rake 11, a swing arm 14, a tension spring 16, a limit element 17, a driving element and a driving unit 12.
The drawing rake 11 is used for drawing the knitted fabric downwards and consists of a drawing seat 111 and a drawing hook 112 used for hooking the knitted fabric, the drawing hook 112 is a needle-shaped drawing hook and is arranged at the head of the drawing seat 111 in a matrix manner, the hook end is arranged in a downward inclined manner, two cylindrical pins 102 are respectively arranged on two sides of the handle part of the drawing rake 11, a guide groove 101 is formed in the position, corresponding to the cylindrical pins 102, of the fixing seat 13, the diameter of each cylindrical pin 102 is matched with the width of the corresponding guide groove 101 and can be slidably arranged in the corresponding guide groove 101, the cylindrical pins 102 and the corresponding guide grooves 101 form a guide structure, and the drawing rake 11 can be arranged on the fixing seat 13 in a vertically sliding manner through the guide.
One end of the swing arm 14 is provided with a hinge hole, the other end of the swing arm is provided with a tension spring hook hanging hole, the swing arm is hinged on the fixed seat 13 through the hinge hole and is connected with the lower end of the tension spring 16 through the tension spring hook hanging hole, the upper end of the tension spring 16 is connected with the traction harrow 11, the position of the lower end of the tension spring 16 can be adjusted through the swing of the swing arm, the length of the tension spring 16 is changed, and therefore the tension of the tension spring is adjusted.
The limiting element 17 is used for limiting the highest position of the swing arm 14, so that the required tension of the tension spring can be set, the limiting element 17 of the embodiment is a limiting block fixedly arranged on a path of the swing arm 14 rotating around a hinge point, the swing arm generates upward rotation under the action of the tension spring 16 and abuts against the limiting element 17, when the drawing rake 11 is driven upwards by the driving element, the position of the lower end of the tension spring 16 is limited by the limiting element 17, and the upper end moves upwards along with the upward driving of the drawing rake 11, so that the tension force is accumulated.
The driving element of this embodiment is a rack 121, the upper end of the rack 121 is a driving end 1211, and at least one of two sides of the rack 121 relative to the symmetrical center of the harrow 11 is provided with a protrusion, which forms an adjusting end 1210 with a downward end surface. The rack 121 is positioned on one side of the swing arm 14 with the drive end 1211 facing the lower end of the rake 11 and the adjustment end 1210 facing the swing arm 14.
The driving rack moves by a driving unit 12 composed of a motor 123 and a gear 122, the motor 123 is fixed on a fixed seat 13, the gear 122 is connected on a rotating shaft of the motor, a sliding groove 132 for slidably connecting a rack 121 is arranged on the fixed seat, and the rack is inserted in the sliding groove 132 and meshed with the gear 122. When the gear 122 rotates along with the motor 123, the gear rack 121 is driven to move up and down along the sliding chute 132, when the gear rack moves up, the gear rack contacts the bottom end of the pulling seat 111 in the pulling rake 11 through the driving end 1211 to push the pulling rake 11 to move up until the set height is reached, and the tension spring 16 is stretched to accumulate tension; the driving end 1211 starts to move downwards, the pulling hook 112 hooks the knitted fabric, the pulling rake moves downwards under the action of the self weight and the pulling force accumulated by the tension spring, if the pulling force for pulling the knitted fabric downwards by the pulling rake 11 does not reach the required pulling force, the driving unit 12 drives the rack 121 to move downwards rapidly, the adjusting end 1210 pushes the swing arm 14 to rotate downwards, so that the lower end of the tension spring 16 moves downwards, as shown in fig. 3, the tension spring is stretched, and the pulling force is increased.
Therefore, the invention can be used for driving the drawing harrow 11 and adjusting the tension of the tension spring by utilizing the movement of the driving element in different directions, so that the original two mechanisms are combined into a whole, the structure is greatly simplified, the operation is reliable, and the cost is reduced.
As shown in fig. 4, in order to smoothly draw the knitted fabric downward, a shield plate 15 is provided on one side of the fixed base 13 corresponding to the knitted fabric, a plurality of long slots 151 are provided in the shield plate 15 in parallel to each row of the drawing hooks on the drawing rake, the corresponding row of the drawing hooks are exposed out of the shield through the long slots 151, the knitted fabric is drawn by the drawing hooks exposed out of the shield plate, and the shield plate is used for blocking the knitted fabric from contacting with other components in the drawing mechanism, so that the knitted fabric smoothly moves downward along the shield plate 15.
As shown in fig. 5, a plurality of the pulling mechanisms 1 having the above-described structure are arranged below the needle plate 91 of the flat knitting machine in the lateral direction (perpendicular to the paper surface) at positions on one side or both sides of the path of the knitted fabric 8, and during the downward movement of the pulling rake 11, the pulling hooks thereon catch the knitted fabric and pull it downward.
The present invention utilizes the contact type driving relationship between the driving end and the pulling rake 11, and adopts a position sensor, which is arranged on the pulling rake 11 or the driving unit 12 to control the lifting of the pulling rake, wherein the position sensor can be a travel switch or a hall element, for example, and generates a detection signal when the driving end and the pulling rake approach or contact with each other, and the driving unit 12 controls the vertical movement of the driving end 1211 by the generation and interruption of the detection signal.
Example 2
As shown in fig. 6-8, the pulling mechanism 1 of the present embodiment also mainly comprises a fixing base 13, a limiting element 17, a pulling rake 11, a swing arm 14, a tension spring 16, a driving element and a driving unit 12, but each pulling mechanism 1 is provided with three parallel pulling rakes 11, and three parallel tension springs 16 are provided corresponding to the three parallel pulling rakes 11.
Further, as shown in fig. 8 and 9, the swing arm 14 of the present embodiment has two swing links 141 disposed in parallel and connected to each other, and the connection portions thereof are disposed at both ends of the swing links to form a hinge end 145 and a connection end 142, respectively. The hinged end is provided with a hinged hole, the swing rod 141 is connected with the fixed seat and the hinged hole in a penetrating way through a pin shaft 143, and one end of the pin shaft is connected with a nut in a screwing way to enable the swing rod to be hinged on the fixed seat 13; the connecting end 142 is provided with three tension spring hook hanging holes, three tension springs 16 with the upper ends respectively connected with the three parallel traction rakes 11, and the lower ends respectively hooked in the corresponding hook hanging holes. The lower end position of the tension spring 16 can be adjusted by the swing of the swing link.
The driving unit 12 of this embodiment is a lead screw transmission mechanism, which includes a motor 123 and a lead screw 125, the lead screw is coaxially connected to the motor shaft, the driving element is a nut 124, which has a rectangular cylinder, a screw hole is provided at the center thereof, and is screwed to the lead screw through the screw hole, and is slidably connected to a corresponding sliding slot of the fixing base 13, so that the nut 124 does not rotate with the lead screw, and only moves up and down. The nut 124 is placed between the two swing arms 14, the upper end of the nut is provided with a driving end 1211 capable of simultaneously contacting the lower ends of the three pulling rakes 11, and the lower end of the nut is provided with an adjusting end 1210 facing the arc positioning protrusion 144 arranged on the swing arm 14.
When the screw rod rotates along with the motor, the nut 124 moves upwards along the screw rod, and contacts and pushes against the drawing rake 11 to move upwards through the driving end until the set highest position, and the tension spring 16 is stretched to accumulate tension; the driving end 1211 starts to move downwards, the pulling hook 112 hooks the braided fabric, the pulling rake moves downwards under the action of self weight and the pulling force accumulated by the tension spring, if the pulling force of the pulling rake 11 for pulling the braided fabric downwards does not reach the required pulling force, the motor 123 drives the screw rod 125 to rotate so as to enable the nut 124 to move downwards rapidly, the adjusting end 1210 moves downwards along with the nut 124 to contact the swing arm 14 and push the swing arm 14 to rotate downwards, so that the lower end of the tension spring 16 moves downwards, the tension spring is lengthened, and the pulling force of the tension spring is increased.
In this embodiment, guide grooves are provided on both sides (or one side) of the handle portion of the pulling rake 11, the guide groove on each side is a composite groove formed by an upper guide groove 101u and a lower guide groove 101d, the upper guide groove 101u is a straight and inclined combination groove formed by a vertically arranged straight groove and an inclined groove communicated with the lower end of the straight groove, and the lower guide groove 101 is a vertically arranged straight groove. The guide members are disposed on the side plates of the fixed base 13 corresponding to both sides of the pulling rake (or on the side plate of one side), and the guide member of each side is composed of two cylindrical pins 102 disposed up and down and respectively disposed in the upper guide groove 101u and the lower guide groove 101 d. When the guide member and the guide groove move relatively, the lower cylindrical pin 102 moves along the straight groove, and the upper cylindrical pin 102 moves along the inclined groove in addition to the straight groove, so that the cylindrical pin moves horizontally relative to the pulling rake 11, and the pulling rake rotates relative to the lower cylindrical pin 102. When the pulling rake moves downwards from the upper end position, the corresponding cylindrical pin 102 moves from the inclined groove to the straight groove, so that the pulling rake rotates towards the side close to the braided fabric relative to the fixed seat, and the pulling hook in the pulling rake extends towards the side of the braided fabric through the long groove hole 151 on the protective cover plate 15 and is exposed out of the protective cover plate to hook the braided fabric, as shown in fig. 10; when the pulling rake moves upward, the corresponding cylindrical pin 102 moves from the straight slot to the inclined slot, so that the pulling rake rotates to the side far away from the knitted fabric relative to the fixed seat, the pulling hook in the pulling rake is retracted inwards through the long slot hole 151 on the shield plate 15 to be hidden in the shield plate, and the pulling is withdrawn, as shown in fig. 11. Therefore, the traction hook completes the extending or retracting movement of the traction hook relative to one side of the braided fabric through the movement of the guide piece along the guide groove, and a transmission mechanism corresponding to the extending or retracting movement is not required to be completed any more, so that the structure of the traction device is greatly simplified.
The limiting element 17 of this embodiment has a cylindrical limiting block 171 at one end, a screw 172 at one end, and a slot 133 along the height direction at a position of the fixing base corresponding to the swing arm rotation path, the slot is vertically disposed (or can be obliquely disposed), the screw of the limiting element 17 passes through the slot and is fixed on the fixing base 13 through a screw nut 173, the limiting block 171 blocks the rotation of the swing arm 14 driven by the tension spring when the drawing rake 11 moves upwards, so as to extend the tension spring 16, so that the limiting block 171 is at different height positions, so that the swing arm 14 has different rotation angles, the smaller the upward rotation angle of the swing arm is, the longer the tension spring is, and therefore, the size of the tension spring tension can be conveniently adjusted at different positions of the slot through the limiting element 17.
A plurality of such pulling mechanisms 1 are arranged below the needle plate of the flat knitting machine in the lateral direction (perpendicular to the paper surface) at a position on one side or both sides of the path of the knitted fabric 8, and during the downward movement of the pulling rake 11, the upper pulling hook catches the knitted fabric and pulls it downward, as shown in fig. 12.
Example 3
As shown in fig. 13, the present embodiment is based on embodiment 2 described above, differing only in the guide structure and the guide groove 101.
The guide groove 101 of this embodiment is a straight and inclined combination groove composed of a straight groove vertically arranged and an inclined groove communicated with the upper end of the straight groove, and is arranged on the side plate of the fixed seat 13 corresponding to both sides of the drawing harrow (or on the side plate of one side), and two cylindrical pins 102 are arranged in the combination groove and are arranged on both sides of the handle part of the drawing harrow 11 (or on one side). When the guide piece moves relative to the guide groove, at least the upper cylindrical pin can move along the inclined groove, and the cylindrical pin can rotate the drawing harrow when the straight groove and the inclined groove are switched. If the pulling rake moves downwards and moves from the inclined groove to the straight groove corresponding to the cylindrical pin 102, the pulling rake rotates towards the side close to the braided fabric, and the pulling hook in the pulling rake extends towards the side of the braided fabric through the long groove hole 151 on the protective cover plate 15 so as to better hook the braided fabric; when the pulling rake moves upward and moves from the straight groove to the inclined groove corresponding to the cylindrical pin 102, the pulling rake is rotated to the side away from the knitted fabric, and the pulling hook in the pulling rake retracts into the shield plate through the long groove hole 151 in the shield plate 15, and the pulling is withdrawn.
The present invention is not limited to the above-mentioned embodiments, and any technical solutions having essential features provided by the present invention according to the idea of the present invention belong to the protection scope of the present invention.
Claims (11)
1. The utility model provides a transverse braiding machine traction mechanism which characterized in that: comprises a fixed seat, a tension spring, a limit element, a traction harrow with a traction hook, a swing arm hinged with the fixed seat and a driving element which is provided with a driving end and an adjusting end and can move up and down; the drawing rake is arranged on the fixed seat in a sliding mode, the upper end and the lower end of the tension spring are respectively connected with the drawing rake and the swing arm, and the limiting element is arranged on a path of the swing arm which swings around the hinge point under the action of the tension spring; when the driving end moves upwards along with the driving element, the driving end is contacted with and pushes the traction rake to move upwards, and the tension spring is stretched to store tension; when the driving end moves downwards along with the driving element, the driving end is disconnected from contacting the traction harrow, and the traction harrow moves downwards under the combined action of self weight and tension of the tension spring; when the adjusting end moves downwards along with the driving element, the adjusting end is in contact with and pushes the swing arm to swing downwards, and the lower end of the tension spring moves downwards to increase the tension of the tension spring.
2. The pulling mechanism for a flat knitting machine according to claim 1, characterized in that: the driving end of the driving element is arranged below the traction harrow, and the driving end is contacted with the traction harrow from the lower part to drive the traction harrow to move upwards; the adjusting end of the driving element is arranged above the swing arm, and the adjusting end is contacted with the swing arm from the upper side to drive the swing arm to swing downwards.
3. The pulling mechanism for a flat knitting machine according to claim 2, characterized in that: the driving element is a nut; the driving end is arranged at the upper end of the nut, the adjusting end is arranged on at least one side of the nut, the end face of the adjusting end faces downwards, and the nut is driven by the rotating screw rod to move up and down.
4. The pulling mechanism for a flat knitting machine according to claim 2, characterized in that: the driving element is a rack, the driving end is arranged at the upper end of the rack, the adjusting end is arranged on at least one side of the rack, the end face of the adjusting end faces downwards, and the rack is driven by the rotating gear to move up and down.
5. The pulling mechanism for a flat knitting machine according to claim 1, characterized in that: the limiting element is fixedly arranged or is arranged on the fixed seat in an up-and-down adjustable mode.
6. The pulling mechanism for a flat knitting machine according to claim 1, characterized in that: the drawing harrow is arranged on the fixed seat in a sliding way through a guide structure of the guide piece and the guide groove which move relatively.
7. The pulling mechanism for a flat knitting machine according to claim 6, characterized in that: the guide part consists of two cylindrical pins or two pin shafts which are arranged up and down, and the guide groove at least comprises a straight groove which is vertically arranged and is matched with the two cylindrical pins or the two pin shafts; the guide piece or the guide groove is arranged on the drawing harrow, and the guide groove or the guide piece which is matched with the guide piece or the guide groove is arranged on the fixed seat corresponding to the guide piece or the guide groove of the drawing harrow.
8. The pulling mechanism for a flat knitting machine according to claim 7, characterized in that: the guide groove also comprises a straight inclined combination groove which is matched with the two cylindrical pins or the two shaft pins and consists of a straight groove and a chute communicated with one end of the straight groove, or a composite groove formed by combining the straight groove and the straight inclined combination groove arranged along the height direction; when the guide piece moves to the inclined groove from the straight groove in the movement relative to the straight and inclined combined groove, the drawing rake rotates to one side far away from the braided fabric, the drawing hook is separated from the braided fabric, and the drawing is withdrawn; when moving from the inclined groove to the straight groove, the drawing hook rotates to one side close to the braided fabric, the drawing hook hooks the braided fabric, and the braided fabric is drawn downwards.
9. The pulling mechanism for a flat knitting machine according to claim 8, characterized in that: the traction mechanism further comprises a guard plate, the guard plate is arranged on one side, corresponding to the braided fabric, of the fixed seat, a long slotted hole matched with the position of the traction hook on the traction rake is formed in the guard plate, the traction hook is hidden in the guard plate through the long slotted hole when the traction rake rotates towards one side far away from the braided fabric, and the traction rake is exposed out of the guard plate through the long slotted hole when rotating towards one side close to the braided fabric.
10. A method for controlling the up and down movement of a rake in a pulling mechanism according to any one of claims 1 to 9, comprising: the drawing harrow or the driving unit is provided with a sensor, the sensor generates a detection signal when the driving end is close to or in contact with the drawing harrow, the driving end drives the drawing harrow to move upwards, when the drawing harrow moves upwards to the upper end of a drawing stroke, the driving end moves downwards, if the drawing harrow does not hook the braided fabric, the drawing harrow moves downwards along with the driving end, if the drawing harrow hooks the braided fabric, the drawing harrow is separated from the driving end to be in contact with the driving end to generate a space, the space enables the detection signal to be interrupted, the detection signal is interrupted to judge that the drawing harrow has drawn the braided fabric, and the drawing harrow draws the braided fabric downwards under the.
11. The control method according to claim 10, characterized in that: the sensor is an electromagnetic proximity switch or a travel switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110316905.XA CN113026191B (en) | 2021-03-25 | 2021-03-25 | Pulling mechanism for flat knitting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110316905.XA CN113026191B (en) | 2021-03-25 | 2021-03-25 | Pulling mechanism for flat knitting machine |
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| Publication Number | Publication Date |
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| CN113026191A true CN113026191A (en) | 2021-06-25 |
| CN113026191B CN113026191B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110316905.XA Active CN113026191B (en) | 2021-03-25 | 2021-03-25 | Pulling mechanism for flat knitting machine |
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| CN113914007A (en) * | 2021-09-17 | 2022-01-11 | 宁波慈星股份有限公司 | Photoelectric induction control method of traction device |
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| CN113026191B (en) | 2023-05-09 |
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