CN112323238A - Ordinary single-sided circular knitting machine for textile production - Google Patents

Abstract

The invention relates to the technical field of textiles, in particular to a common single-sided circular knitting machine for textile production, which comprises a creel, wherein support rods are uniformly and fixedly arranged on the periphery of the lower side wall of the creel, a support plate is fixedly arranged on one side, away from the creel, of each support rod, an upright post is uniformly and fixedly arranged on the outer side of the support plate, a support seat is fixedly arranged on the lower side wall of the upright post, a knitting mechanism is arranged below the support plate, the knitting mechanism is fixedly connected with the support seat, support blocks are fixedly arranged on opposite side walls of all groups of the support seats, a bottom plate is fixedly arranged on the upper side wall of each support block, sliding seats are symmetrically and slidably arranged on the upper side wall of the bottom; compared with the prior art, the automatic roll changing machine has the advantages that the roll is automatically changed, and the problems that the time and labor are wasted and the production efficiency of a circular knitting machine is influenced due to the fact that the roll is manually changed at present are solved.

Description

Ordinary single-sided circular knitting machine for textile production

Technical Field

The invention relates to the technical field of spinning, in particular to a common single-side circular knitting machine for textile production.

Background

Circular knitting machines, known as circular weft knitting machines (or circular knitting machines). The circular knitting machine has the advantages of multiple loop forming systems (called yarn feeding path number or loop forming path number in enterprises for short), high rotating speed, high yield, fast change of pattern, good fabric quality, few working procedures and strong product adaptability, so the circular knitting machine develops quickly, the circular knitting machine has multiple loop forming paths, the circular knitting machine has a single needle path (one runway), two needle paths (two runways), three needle paths (three runways), four needle paths and six needle paths, the circular knitting machine is mostly used in the knitting enterprises at present, and the circular knitting machine is a four-needle path single-face circular knitting machine which utilizes organic permutation of knitting needles and triangles to knit various novel fabrics.

The surface fabric that big circular knitting machine was woven needs to be convoluteed through the winding up roller, and after the surface fabric on the winding up roller was convoluteed to the maximum, then need change the winding up roller, and present single face circular knitting machine is when changing the winding up roller, at first needs to shut down big circular knitting machine, then changes the winding up roller manually, causes the problem that whole change process is wasted time and energy.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a common single-side circular knitting machine for textile production.

In order to achieve the purpose, the invention adopts the following technical scheme:

the common single-face circular knitting machine for textile production comprises a creel, wherein support rods are uniformly and fixedly mounted on the periphery of the lower side wall of the creel, a support plate is fixedly mounted on one side, away from the creel, of each support rod, a stand column is uniformly and fixedly mounted on the outer side of the support plate, a support seat is fixedly mounted on the lower side wall of the stand column, a knitting mechanism is arranged below the support plate, the knitting mechanism is fixedly connected with the support seats, support blocks are fixedly mounted on opposite side walls of the support seats of each group, a bottom plate is fixedly mounted on the upper side wall of each support block, slide seats are symmetrically and slidably mounted on the upper side wall of the bottom plate, side plates are fixedly mounted on the upper side wall of each slide seat, through holes are formed in inner cavities of the side plates, drive shafts are rotatably, the winding motor with curb plate fixed connection, it is two sets of be equipped with positioner between the drive shaft, the outside of slide is equipped with the U-shaped support frame, the U-shaped support frame with bottom plate fixed connection, the top of U-shaped support frame is equipped with adjusting device, the last lateral wall center department fixed mounting of bottom plate has the mounting panel, the mounting panel is kept away from the both sides of bottom plate all are equipped with automatic dress roller device, the last lateral wall of mounting panel rotates installs the baffle, the baffle keep away from with one side of mounting panel junction is rotated and is installed the second pneumatic cylinder, the second pneumatic cylinder keep away from one side of baffle with the mounting panel rotates to be connected.

Preferably, positioner includes the main location disc, main location disc fixed mounting is two sets of the opposite side of drive shaft, the inner chamber center department fixed mounting of main location disc has the inserted bar, the main location disc is kept away from the constant head tank has evenly been seted up all around to one side of drive shaft, and is two sets of be equipped with the winding up roll between the main location disc, the equal fixed mounting in both ends of winding up roll has vice location disc, the inner chamber of vice location disc set up with the slot of inserted bar looks adaptation, even fixed mounting all around of vice location disc is kept away from winding up roll one side have with the straight triangle tooth piece of constant head tank looks adaptation.

Preferably, both sides of the outer side wall of the winding roller are fixedly provided with a retaining ring, one side of the retaining ring, which is close to the auxiliary positioning disc, is provided with a limiting block, and the limiting block is fixedly connected with the winding roller.

Preferably, adjusting device includes step motor, step motor fixed mounting in the last lateral wall of U-shaped support frame, the outside of drive shaft is rotated and is installed the adjustable ring, the lower lateral wall fixed mounting of adjustable ring has the guide slider, the below of guide slider is equipped with the guide roll, the lateral wall of guide roll seted up with the arc guide way of guide slider looks adaptation, the both sides of guide roll are all rotated and are installed the roller frame, the roller frame with bottom plate fixed connection, step motor's output runs through the through-hole with guide roll fixed connection.

Preferably, the upper side wall both sides of bottom plate all fixed mounting have the pouring jacket, roller frame, guide roll with the adjustable ring all set up in the inner chamber of pouring jacket.

Preferably, the inner chamber fixed mounting of pouring jacket has the slide bar, the outside slidable mounting of slide bar has the slider, the slider with the last lateral wall fixed connection of adjustable ring.

Preferably, the automatic roller loading device comprises a first hydraulic cylinder, the first hydraulic cylinder is fixedly installed on the mounting plate and is far away from the two sides of the bottom plate, the output end of the first hydraulic cylinder is fixedly installed with a lifting plate, the upper side wall of the lifting plate is provided with a chute, and the lower side of the chute is provided with a roller placing groove matched with the winding roller.

Preferably, the upper side wall of the guide plate is provided with a groove, an inner cavity of the groove is provided with an arc-shaped carriage, rotating shafts are fixedly mounted on two sides of the arc-shaped carriage and are rotatably connected with the guide plate, a torsion spring is sleeved on the outer side of each rotating shaft, and two ends of the torsion spring are fixedly connected with the arc-shaped carriage and the guide plate respectively.

The invention provides a common single-sided circular knitting machine for textile production, which has the beneficial effects that: the invention can realize the installation and the disassembly of the main positioning disk and the auxiliary positioning disk by arranging the stepping motor, the guide roller, the guide slide block and the lifting plate, when the stepping motor is started to work, the adjusting ring, the driving shaft and the main positioning disk can be driven to move by driving the guide roller to rotate, the roller placing groove and the chute are used for placing a roller for winding fabrics, when the first hydraulic cylinder is started to work, the roller in the inner cavity of the roller placing groove can be driven to move to the same height with the main positioning disks at two sides, then the stepping motor is started to drive the driving shaft and the main positioning disk to move to one side of the roller in the inner cavity of the roller placing groove, so that the inserted rod is inserted into the inner cavity of the slot, and the straight triangular tooth block is inserted into the inner cavity of the positioning groove to realize the installation and the fixation of the roller, compared with the prior art, the invention can automatically replace the roller, and avoid the manual replacement of the roller, not only wastes time and labor, but also influences the production efficiency of the circular knitting machine.

Drawings

FIG. 1 is a front view of a conventional single-sided circular knitting machine for textile production according to the present invention;

FIG. 2 is an enlarged view of the structure of part A of a common single-sided circular knitting machine for textile production according to the present invention;

FIG. 3 is an enlarged view of the structure of the B part of a common single-sided circular knitting machine for textile production according to the present invention;

FIG. 4 is a sectional view showing the structure of a jacket of a conventional single-sided circular knitting machine for textile production according to the present invention;

FIG. 5 is a schematic structural view of a lifting plate of a common single-sided circular knitting machine for textile production according to the present invention;

FIG. 6 is a side view of a guide plate structure of a common single-sided circular knitting machine for textile production according to the present invention;

FIG. 7 is a structural side view of a U-shaped supporting frame of a common single-sided circular knitting machine for textile production, which is provided by the invention;

FIG. 8 is a side view of the lifting plate structure of a common single-sided circular knitting machine for textile production according to the present invention.

In the figure: the yarn creel 1, the upright post 2, the knitting mechanism 3, a supporting plate 4, a supporting rod 5, a supporting seat 6, a supporting block 7, a bottom plate 8, a sliding seat 9, a side plate 10, a through hole 11, a driving shaft 12, an adjusting ring 13, a guiding slide block 14, a main positioning disc 15, an inserting rod 16, a positioning groove 17, a winding roller 18, an auxiliary positioning disc 19, an inserting groove 20, a straight triangular tooth block 21, a roller frame 22, a guiding roller 23, an arc-shaped guiding groove 24, a stepping motor 25, a U-shaped supporting frame 26, a winding motor 27, a limiting block 28, a baffle ring 29, a sleeve box 30, a mounting plate 31, a torsion spring 32, a first hydraulic cylinder 33, a lifting plate 34, a groove 35, an arc-shaped planker 36, a guide plate 37, a slide block 38, a slide rod 39, a.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-8, a common single-side circular knitting machine for textile production comprises a creel 1, wherein support rods 5 are uniformly and fixedly installed on the periphery of the lower side wall of the creel 1, a support plate 4 is fixedly installed on one side of each support rod 5 far away from the creel 1, an upright post 2 is uniformly and fixedly installed on the outer side of the support plate 4, a support seat 6 is fixedly installed on the lower side wall of the upright post 2, a knitting mechanism 3 is arranged below the support plate 4, the knitting mechanism 3 is fixedly connected with the support seat 6, support blocks 7 are fixedly installed on the opposite side walls of each group of support seats 6, a bottom plate 8 is fixedly installed on the upper side wall of each support block 7, slide seats 9 are symmetrically and slidably installed on the upper side wall of each bottom plate 8, side plates 10 are fixedly installed on the upper side wall of each slide seat 9, through holes 11 are, the winding motor 27 is fixedly connected with the side plate 10, a positioning device is arranged between the two groups of driving shafts 12, the positioning device comprises a main positioning disc 15, the main positioning disc 15 is fixedly arranged at the opposite side of the two groups of driving shafts 12, an inserted link 16 is fixedly arranged at the center of the inner cavity of the main positioning disc 15, positioning grooves 17 are uniformly arranged on the periphery of one side of the main positioning disc 15 away from the driving shafts 12, a winding roller 18 is arranged between the two groups of main positioning discs 15, auxiliary positioning discs 19 are fixedly arranged at the two ends of the winding roller 18, a slot 20 matched with the inserted link 16 is arranged in the inner cavity of the auxiliary positioning disc 19, straight triangular tooth blocks 21 matched with the positioning grooves 17 are uniformly and fixedly arranged on the periphery of one side of the auxiliary positioning disc 19 away from the winding roller 18, the straight triangular tooth blocks 21 and the positioning grooves 17 are matched with each other for connecting the driving shafts 12 with the winding roller 18, and, the winding motor 27 is used for driving the winding roller 18 to rotate through the driving shaft 12 when the starting operation is carried out, so that the big circular knitting machine cannot perform winding.

The outer side of the sliding seat 9 is provided with a U-shaped supporting frame 26, the U-shaped supporting frame 26 is fixedly connected with the bottom plate 8, an adjusting device is arranged above the U-shaped supporting frame 26, the adjusting device comprises a stepping motor 25, the stepping motor 25 is fixedly arranged on the upper side wall of the U-shaped supporting frame 26, the outer side of the driving shaft 12 is rotatably provided with an adjusting ring 13, the lower side wall of the adjusting ring 13 is fixedly provided with a guide slider 14, a guide roller 23 is arranged below the guide slider 14, the outer side wall of the guide roller 23 is provided with an arc-shaped guide groove 24 matched with the guide slider 14, both sides of the guide roller 23 are rotatably provided with roller frames 22, the roller frames 22 are fixedly connected with the bottom plate 8, the output end of the stepping motor 25 penetrates through the through hole 11 and is fixedly connected with the guide roller 23, the stepping motor 25 drives the guide roller 23 to rotate, The side plate 10 and the sliding seat 9 horizontally move, so that the straight triangular tooth block 21 is separated from the inner cavity of the positioning groove 17, the automatic disassembly of the winding roller 18 is realized, and the problems of time and labor waste caused by manual disassembly of the winding roller 18 are solved.

The mounting plate 31 is fixedly mounted at the center of the upper side wall of the bottom plate 8, the guide plate 37 is rotatably mounted on the upper side wall of the mounting plate 31, the second hydraulic cylinder 43 is rotatably mounted on one side of the guide plate 37, which is far away from the connection with the mounting plate 31, the second hydraulic cylinder 43 is rotatably connected with the mounting plate 31, the groove 35 is formed in the upper side wall of the guide plate 37, the arc-shaped carriage 36 is arranged in the inner cavity of the groove 35, the rotating shafts 42 are fixedly mounted on two sides of the arc-shaped carriage 36, the rotating shafts 42 are rotatably connected with the guide plate 37, the torsion spring 32 is sleeved outside the rotating shafts 42, two ends of the torsion spring 32 are respectively fixedly connected with the arc-shaped carriage 36 and the guide plate 37, when the second hydraulic cylinder 43 is started to work, the guide plate 37 is used for guiding the dismounted winding roller 18, the guide plate 37 rolls downwards, the arc-shaped carriage 36 is used for supporting and lifting the dismounted winding roller 18, and, the torsion spring 32 is used for driving the arc-shaped carriage 36 to rotate to an initial state after the disassembled winding roller 18 rolls off the inner cavity of the arc-shaped carriage 36, so as to lift and support the next group of disassembled winding rollers 18.

Both sides that the bottom plate 8 was kept away from to mounting panel 31 all are equipped with automatic roller loading device, automatic roller loading device includes first pneumatic cylinder 33, first pneumatic cylinder 33 fixed mounting is in the both sides that the bottom plate 8 was kept away from to mounting panel 31, the output fixed mounting of first pneumatic cylinder 33 has lift plate 34, chute 40 has been seted up to the last lateral wall of lift plate 34, the downside of chute 40 is seted up with the roller groove 41 of putting of winding up roller 18 looks adaptation, be used for placing the winding up roller 18 of not coiling the surface fabric on putting roller groove 41 and the chute 40, be used for adjusting the height of lift plate 34 when first pneumatic cylinder 33 starts, once with will put the winding up roller 18 of roller groove 41 inner chamber and promote as the same as the height of main positioning disc 15, once in the automatic change to winding up roller.

The two sides of the outer side wall of the winding roller 18 are fixedly provided with baffle rings 29, one side of each baffle ring 29, which is close to the auxiliary positioning disc 19, is provided with a limiting block 28, each limiting block 28 is fixedly connected with the winding roller 18, each baffle ring 29 is used for limiting the wound fabric, so that the fabric is wound more neatly, and each limiting block 28 is used for limiting the winding roller 18 when the winding roller 18 is placed on the two groups of lifting plates 34 so as to keep the winding roller 18 centered.

The two sides of the upper side wall of the bottom plate 8 are fixedly provided with the sleeve box 30, the roller frame 22, the guide roller 23 and the adjusting ring 13 are arranged in an inner cavity of the sleeve box 30, the inner cavity of the sleeve box 30 is fixedly provided with a slide rod 39, the outer side of the slide rod 39 is slidably provided with a slide block 38, the slide block 38 is fixedly connected with the upper side wall of the adjusting ring 13, the sleeve box 30 is used for protecting the winding motor 27 and the stepping motor 25, the situation that dust enters the inner cavities of the winding motor 27 and the stepping motor 25 when the circular knitting machine works is avoided, the service lives of the winding motor 27 and the stepping motor 25 are reduced, the slide rod 39 and the slide block 38 are used for guiding the left-right movement of the adjusting ring 13, the rotation of the adjusting ring 13 is prevented.

The working principle is as follows: when the invention is used, a plurality of winding rollers 18 are placed on a lifting plate 34, the winding roller 18 at the bottom end falls into an inner cavity of a roller placing groove 41 under the action of gravity, the fabric produced by a big circular machine is fixed on the winding roller 18 between two groups of main positioning disks 15, a winding motor 27 is started to work at the same time, so that the fabric produced by the big circular machine is wound, after the fabric on the winding roller 18 is wound to the maximum amount, the big circular machine and the winding motor 27 stop working, after the winding motor 27 stops rotating, a second hydraulic cylinder 43 is started to extend to drive a guide plate 37 to rotate until an arc-shaped planker 36 moves to be contacted with the fabric wound outside the winding roller 18, then stepping motors 25 at two sides are started simultaneously to enable the stepping motor 25 to drive a guide roller 23 to rotate to 180 degrees, when the guide roller 23 rotates, a guide slide block 14 slides along an arc-shaped guide groove 24 on the surface of the guide roller 23, the adjusting ring 13, the driving shaft 12, the side plate 10 and the slide carriage 9 are driven by the guide slide block 14 to move to one side far away from the winding roller 18, so that the straight triangular tooth block 21 is separated from the inner cavity of the positioning groove 17, the inserted link 16 is separated from the inner cavity of the slot 20, then the winding roller 18 fully wound with the fabric falls on the arc-shaped carriage 36 under the action of gravity, and then rolls along the guide plate 37 to the mounting plate 31 under the action of gravity, after the winding roller 18 is separated from the inner cavity of the arc-shaped carriage 36, the torsion spring 32 recovers deformation, and further the arc-shaped carriage 36 is driven to rotate to the initial position, then the second hydraulic cylinder 43 is started to contract, further the guide plate 37 is driven to rotate to the initial position, then the first hydraulic cylinder 33 is started, so that the first hydraulic cylinder 33 drives the inner cavity of the roller groove 41 to expect that the winding roller 18 not wound with the fabric above the chute 40 to move upwards until, meanwhile, the auxiliary positioning disks 19 on the two sides of the winding roller 18 are aligned with the main positioning disk 15, then the stepping motor 25 is started, so that the stepping motor 25 drives the guide roller 23 to rotate to 180 degrees again, when the guide roller 23 rotates again, the guide slider 14 slides along the arc-shaped guide groove 24 on the surface of the guide roller 23, and drives the adjusting ring 13, the driving shaft 12, the side plate 10 and the sliding seat 9 to move towards one side of the winding roller 18 close to the inner cavity of the roller holding groove 41 through the guide slider 14 until the inserted link 16 in the inner cavity of the main positioning disk 15 is inserted into the inner cavity of the slot 20, and the right triangular tooth block 21 is inserted into the inner cavity of the positioning groove 17, so that the winding roller 18 opposite to the inner cavity of the roller holding groove 41 is fixed, then the first hydraulic cylinder 33 is started again, so that the first hydraulic cylinder 33 drives the lifting plate 34 to move downwards, the winding roller 18 in the inner cavity of the roller holding groove 41 is separated from the roller holding groove 41, and the, the winding roller 18 at the bottom of the chute 40 rolls into the inner cavity of the roller holding groove 41, so as to facilitate the replacement of the winding roller 18 next time.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (8)

1. The utility model provides a weaving production is with knitting big circular knitting machine of ordinary single face, includes creel (1), its characterized in that, the even fixed mounting in the lower lateral wall of creel (1) has bracing piece (5) all around, one side fixed mounting that bracing piece (5) kept away from creel (1) has supporting disk (4), the even fixed mounting in the outside of supporting disk (4) has stand (2), the lower lateral wall fixed mounting of stand (2) has supporting seat (6), the below of supporting disk (4) is equipped with weaving mechanism (3), weaving mechanism (3) with supporting seat (6) fixed connection, each group the equal fixed mounting of the relative lateral wall of supporting seat (6) has tray (7), the last lateral wall fixed mounting of tray (7) has bottom plate (8), the last lateral wall symmetry slidable mounting of bottom plate (8) has slide (9), the last lateral wall fixed mounting of slide (9) has curb plate (10), through-hole (11) have been seted up to the inner chamber of curb plate (10), and are two sets of drive shaft (12), left side are all installed in the opposite side of curb plate (10) rotation, drive shaft (12) one end fixed mounting has coiling motor (27), coiling motor (27) with curb plate (10) fixed connection, it is two sets of be equipped with positioner between drive shaft (12), the outside of slide (9) is equipped with U-shaped support frame (26), U-shaped support frame (26) with bottom plate (8) fixed connection, the top of U-shaped support frame (26) is equipped with adjusting device, the last lateral wall center department fixed mounting of bottom plate (8) has mounting panel (31), mounting panel (31) are kept away from the both sides of bottom plate (8) all are equipped with automatic roller installation device, guide plate (37) are installed in the last lateral wall rotation of mounting panel (31), guide plate (37) keep away from with one side of mounting panel (31) junction is rotated and is installed second hydraulic 43) And one side of the second hydraulic cylinder (43) far away from the guide plate (37) is rotatably connected with the mounting plate (31).

2. A plain single-sided circular knitting machine for textile production according to claim 1, the positioning device comprises main positioning disks (15), the main positioning disks (15) are fixedly arranged on the opposite sides of the two groups of driving shafts (12), an inserted bar (16) is fixedly arranged at the center of the inner cavity of the main positioning disc (15), positioning grooves (17) are uniformly formed in the periphery of one side, away from the driving shaft (12), of each main positioning disc (15), a winding roller (18) is arranged between the two groups of main positioning discs (15), two ends of the winding roller (18) are fixedly provided with auxiliary positioning disks (19), the inner cavity of the auxiliary positioning disc (19) is provided with a slot (20) matched with the inserted rod (16), and straight triangular tooth blocks (21) matched with the positioning grooves (17) are uniformly and fixedly arranged on the periphery of one side, far away from the winding roller (18), of the auxiliary positioning disc (19).

3. A common single-sided circular knitting machine for textile production as in claim 2 characterized in that both sides of the outer side wall of the winding roller (18) are fixedly mounted with a retaining ring (29), a limiting block (28) is arranged on one side of the retaining ring (29) close to the secondary positioning disc (19), and the limiting block (28) is fixedly connected with the winding roller (18).

4. A plain single-sided circular knitting machine for textile production according to claim 1, the adjusting device comprises a stepping motor (25), the stepping motor (25) is fixedly arranged on the upper side wall of the U-shaped supporting frame (26), an adjusting ring (13) is rotatably arranged on the outer side of the driving shaft (12), a guide sliding block (14) is fixedly arranged on the lower side wall of the adjusting ring (13), a guide roller (23) is arranged below the guide sliding block (14), an arc-shaped guide groove (24) matched with the guide sliding block (14) is formed in the outer side wall of the guide roller (23), the two sides of the guide roller (23) are respectively provided with a roller frame (22) in a rotating way, the roller frames (22) are fixedly connected with the bottom plate (8), the output end of the stepping motor (25) penetrates through the through hole (11) and is fixedly connected with the guide roller (23).

5. A common single-sided circular knitting machine for textile production according to claim 4 characterized in that the two sides of the upper side wall of the bottom plate (8) are fixedly installed with a sleeve box (30), and the roller frame (22), the guide roller (23) and the adjusting ring (13) are all arranged in the inner cavity of the sleeve box (30).

6. A common single-sided circular knitting machine for textile production according to claim 5 characterized in that a slide bar (39) is fixedly installed in the inner cavity of the jacket (30), a slide block (38) is slidably installed on the outer side of the slide bar (39), and the slide block (38) is fixedly connected with the upper side wall of the adjusting ring (13).

7. The common single-sided circular knitting machine for textile production as claimed in claim 2, characterized in that the automatic roller loading device comprises a first hydraulic cylinder (33), the first hydraulic cylinder (33) is fixedly mounted on both sides of the mounting plate (31) far away from the bottom plate (8), the output end of the first hydraulic cylinder (33) is fixedly mounted with a lifting plate (34), the upper side wall of the lifting plate (34) is provided with a chute (40), and the lower side of the chute (40) is provided with a roller containing groove (41) adapted to the winding roller (18).

8. The common single-sided circular knitting machine for textile production as claimed in claim 1, characterized in that a groove (35) is formed in the upper side wall of the guide plate (37), an arc-shaped carriage (36) is arranged in the inner cavity of the groove (35), rotating shafts (42) are fixedly mounted on both sides of the arc-shaped carriage (36), the rotating shafts (42) are rotatably connected with the guide plate (37), a torsion spring (32) is sleeved on the outer side of the rotating shafts (42), and both ends of the torsion spring (32) are fixedly connected with the arc-shaped carriage (36) and the guide plate (37) respectively.

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