CN203904624U - Rotating device for upper crochet hooks of knotted fishing net machine - Google Patents
Rotating device for upper crochet hooks of knotted fishing net machine Download PDFInfo
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- CN203904624U CN203904624U CN201420180915.0U CN201420180915U CN203904624U CN 203904624 U CN203904624 U CN 203904624U CN 201420180915 U CN201420180915 U CN 201420180915U CN 203904624 U CN203904624 U CN 203904624U
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- 238000005096 rolling process Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 abstract description 21
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003137 locomotive effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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Abstract
The utility model relates to a rotating device for upper crochet hooks of a knotted fishing net machine. The rotating device comprises a main shaft (1), a cylindrical cam (2) provided with a groove, a first roller (3), a second roller (8), a swing driven piece, a first small shaft (4-1), a second small shaft (6-1), a third small shaft (7-1), a first perforated support (6-2), a second perforated support (6-3), a third perforated support (13-1), a fourth perforated support (24), a slipping piece (9) provided with a groove, a long button (10), a No. 1 shaft (12), a No. 2 shaft (23), a U-shaped plate (14), a plate (17), a rack plate (19) and an upper crochet hook gear body (20). The rotating device has the following benefits: 1) by the adoption of the rack and gear device, simultaneous rotation of over 1000 crochet hooks is realized; 2) by the adoption of simple transmission devices in a serial manner, movement of the final execution piece is realized, multi-way devices in need of a plurality of movement driving links are avoided, and the cost is reduced.
Description
Technical Field
The utility model relates to a crochet hook rotating device on knotted fishing net machine belongs to spinning machine technical field.
Background
In the process of weaving the fishing net by the knotted fishing net machine, the realization of knotting of the braided wire is an important technical process. At this in-process, go up the crochet hook and have two movements, the rotation and the swing of going up the crochet hook promptly, the utility model discloses to rotating the requirement, design out specific mechanical motion device structure.
The rotation of the upper crochet hook has the following effects on the knotting process: the knitting yarn forms a basic coil, and then is pulled by a lower crochet hook and is interwoven and knotted with the weft yarn to form a knot. Therefore, the specific requirements of the rotation of the upper crochet hook have three aspects, namely the motion form, the motion change rule requirement and the motion stroke size. The motion form is rotation, the motion change rule is uniform rotation, and the stroke is 2.5 turns (within one rotation period of the main shaft). The key transmission device in the prior art adopts a spring return structure to meet the requirement of rotation of the upper hook needle, and the spring has fatigue effect and cannot well meet the requirements of motion change rule and motion stroke size, so that the quality of the woven fishing net is influenced, and the production efficiency of equipment is reduced.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide an upper crochet hook rotating device of a knotted fishing net machine.
The utility model relates to a crochet hook rotating device on a knotted fishing net machine, which comprises a main shaft (1), a cylindrical cam (2) with a groove, a first roller (3), a second roller (8), a swinging driven part, a first small shaft (4-1), a second small shaft (6-1), a third small shaft (7-1), a first support with holes (6-2), a second support with holes (6-3), a third support with holes (13-1), a fourth support with holes (24), a sliding part (9) with a groove, a long key (10), a first shaft (12), a second shaft (23), a U-shaped plate (14), a plate (17), a rack plate (19) and an upper crochet hook gear body (20),
wherein,
the cylindrical cam (2) is arranged on the main shaft (1), the first roller (3) is arranged in a groove of the cylindrical cam (2), the first roller (3) is a rolling bearing, an outer ring of the first roller is in contact with the groove on the cylindrical cam (2), and an inner ring of the first roller is tightly sleeved on the first small shaft (4-1);
the cylindrical cam (2) and the swinging follower form a primary cylindrical cam device; the swing driven piece consists of a swing arm (5-1) and a U-shaped swing arm (5-2); the first small shaft (4-1) is fixed on the swing arm (5-1); the second small shaft (6-1) is arranged in a hole of the first support (6-2) with the hole;
the U-shaped swing arm (5-2) is provided with two symmetrical vertical arms (R) and (L), the third small shaft (7-1) is fixed on the vertical arm (R), the other end of the third small shaft (7-1) is sleeved with a second roller (8), the second roller (8) is a rolling bearing, an inner ring is fixedly sleeved on the third small shaft (7-1), an outer ring is arranged in a groove of the sliding piece (9), similarly, the vertical arm (L) is also provided with a small shaft and a roller which are completely the same as those on the vertical arm (R), and the U-shaped swing arm (5-2), the second roller (8) and the sliding piece (9) form a lantern ring device;
the first shaft (12) is arranged in holes of the second support (6-3) with holes and the third support (13-1) with holes, a key groove with the same length as the first shaft (12) is formed in the first shaft (12), a long key (10) with the same length as the first shaft (12) is arranged in the key groove, and the sliding part (9) is sleeved at one end of the first shaft (12) and fixed at one end of the long key (10); the other end of the first shaft (12) is fixed with the U-shaped plate (14) into a whole, the plate (17) is fixed at the other end of the long key (10), the rack plate (19) is fixedly connected with the plate (17), and the long key (10) and the rack plate (19) are fixed into a whole through the plate (17);
the U-shaped plate (14) consists of an upper plate (14-1), a vertical plate (14-2), a middle plate (14-3), a top column (14-4), a guide plate (14-5) and a bottom plate (14-6), all parts are fixed into a whole, holes are formed in the middle plate (14-3) and the bottom plate (14-6) and used for mounting an upper crochet hook gear body (20), and the U-shaped plate (14) and the upper crochet hook gear body (20) form a rack and gear device; the U-shaped plate (14) is connected with a second shaft (23), and the second shaft (23) is sleeved in a hole of a fourth support (24) with a hole;
the rack plate (19) consists of a guide part (19-1) and a rack body (19-2), the guide part (19-1) is connected with the plate (17), and the rack plate (19) is attached to the guide plate (14-5);
the upper crochet hook gear body (20) consists of a head (20-1), a gear (20-2), a cylinder (20-3) and an upper crochet hook (20-4), the cylinder (20-3) of the upper crochet hook gear body (20) is arranged in holes of a middle plate (14-3) and a bottom plate (14-6) of a U-shaped plate, and the upper crochet hook gear body (20) is axially positioned by a clamp spring and can only rotate;
preferably, the first and second electrodes are formed of a metal,
a waist-shaped hole is formed in the swing arm (5-1), and the first small shaft (4-1) penetrates through the waist-shaped hole and is fixed on the swing arm (5-1);
the vertical arm (R) is provided with a waist-shaped hole, and the first small shaft (7-1) penetrates through the waist-shaped hole and is fixed on the vertical arm (R).
The working principle of the utility model is as follows: the working principle of the utility model is as follows: the primary cylindrical cam device is adopted to convert the continuous rotation of active motion into reciprocating swing, the requirement of the rotation change rule of the upper crochet hook is realized by different shapes of cam profile lines, the reciprocating swing is converted into reciprocating linear motion through the lantern ring device, and the reciprocating linear motion is converted into reciprocating rotation through the rack and gear device. When the cylindrical cam (2) rotates, the swinging driven piece is driven to swing, and the sliding piece (9) is driven to linearly slide on the shaft (12) through the second roller (8). The lantern ring device is composed of a U-shaped swing arm 5-2, a second roller (8) and a sliding piece (9). The long key (10) installed in the key groove of the first shaft (12) can move linearly relative to the first shaft (12). The sliding piece 9 and the long key 10 are slid together by a screw 11, so that the swinging of the swinging follower is converted into the linear movement of the long key 10 in the key groove of the first shaft 12. The long key (10) is fixed with the rack plate 19 through a plate (17), and the first shaft (12) is fixed with the U-shaped plate (14) through the plate (17). The shaft (12) does not move linearly, so that the U-shaped plate (14) does not move linearly, and the long key (10) moves linearly relative to the first shaft (12), so that the rack plate (19) moves linearly relative to the U-shaped plate. The upper crochet hook gear body (20) is arranged in the hole of the U-shaped plate. The rack body (19-2) is engaged with the gear (20-2), and when the rack plate (19) moves linearly, the driving gear (20-2) rotates, and the upper crochet hook (20-4) which is integrated with the gear (20-2) also rotates.
The utility model discloses has following technological effect:
1) the rack and gear device is utilized to realize the simultaneous rotation of more than 1000 crochet hooks;
2) the movement of the final actuating element is realized by adopting a mode of connecting simple transmission devices in series, a plurality of moving driving elements are avoided being adopted, and the cost is saved;
3) the driving part of the whole transmission device is driven by a cylindrical cam, and the driven part is locked in a shape through a geometric relation formed by grooves on the driving part, so that a spring return structure is avoided.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the following specific embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a partial structure diagram of a crochet hook rotating device on a knotted fishing net machine;
FIG. 2 is a partial schematic view of the cylindrical cam motion device;
FIG. 3 is a schematic view of a portion of the structure of FIG. 1;
FIG. 4 is a schematic view of a portion of FIG. 1 from the direction B;
fig. 5 is a partial schematic view of the structure of the U-shaped plate (14) and the rack plate (19).
Fig. 6 is a schematic structural view of the upper bearded needle gear body (20);
fig. 7 is a schematic view of a portion of the structure in fig. 1.
Wherein, 1 is a main shaft, 2 is a cylindrical cam, 3 and 8 are rollers, 4-1 is a first small shaft, 4-2, 4-3, 7-2 and 7-3 are nuts, 5-1 is a swing arm, 5-2 is a U-shaped swing arm, R, L is a vertical arm of the U-shaped swing arm (5-2), 6-0 is a left wallboard, 6-1 is a second small shaft, 7-1 is a third small shaft, 6-2 is a first support with holes, 6-3 is a second support with holes, 13-1 is a third support with holes, 24 is a fourth support with holes, 9 is a sliding piece, 10 is a long key, 12 is a first shaft, 23 is a second shaft, 11, 16, 18-1, 18-2 and 21 are screws, 13-0 is a right wallboard, 14 is a U-shaped plate, 14-1 is an upper plate, 14-2 is a vertical plate, 14-3 is a middle plate, 14-4 is a top column, 14-5 is a guide plate, 14-6 is a bottom plate, 15 is a partition plate, 17 is a plate, 19 is a rack plate, 19-1 is a guide part, 19-2 is a rack body, 20 is an upper bearded needle gear body, 20-1 is a head part of the upper bearded needle gear body, 20-2 is a gear of the upper bearded needle gear body, 20-3 is a column body of the upper bearded needle gear body, 20-4 is an upper bearded needle of the upper bearded needle gear body, and 25 is a tail wallboard.
Detailed Description
As shown in figures 1-7, the utility model discloses a there is knot fishing net machine goes up crochet hook rotating device includes main shaft (1), grooved cylinder cam (2), first roller (3), second roller (8), swing follower, first staff (4-1), second staff (6-1), third staff (7-1), first foraminiferous support (6-2), second foraminiferous support (6-3), third foraminiferous support (13-1), fourth foraminiferous support (24), grooved sliding piece (9), long key (10), first axle (12), second axle (23), U shaped plate (14), board (17), rack board (19) and the crochet hook gear body (20).
The main shaft (1) is positioned between the left wall plate (6-0) and the right wall plate (13-0) of the whole locomotive, is arranged in holes of the left wall plate (6-0) and the right wall plate (13-0), and is driven to rotate by a motor, a belt transmission and a gear transmission (not shown in the figure). A cylindrical cam (2) is fixedly arranged on the main shaft (1) and rotates together with the main shaft. The cylinder cam (2) is provided with a groove, the first roller (3) is arranged in the groove of the cylinder cam (2), the first roller (3) is of a rolling bearing structure, an outer ring is in contact with the groove on the cylinder cam (2), an inner ring is sleeved on the first small shaft (4-1) in a tight fit mode, the first small shaft (4-1) penetrates through a waist-shaped hole in the swing arm (5-1), a part, penetrating through the waist-shaped hole, of the first small shaft (4-1) is provided with threads, the first small shaft (4-2) and the first roller (4-3) are arranged on two sides of the swing arm (5-1) and tightly press the first small shaft (4-1) on the waist-shaped hole of the swing arm (5-1). When the cylindrical cam (2) rotates, the swing arm (5-1) is driven to swing through the first roller (3), the second small shaft (6-1) is a fulcrum small shaft of the swing arm (5-1) and is arranged in a hole of the first support (6-2) with the hole, and the first support (6-2) with the hole is fixedly arranged on the right and left wall plates (6-0) of the locomotive.
The other end of the swing arm (5-1) is a U-shaped swing arm (5-2), and the two swing arms swing around a second small shaft (6-1) integrally. The U-shaped swing arm (5-2) is provided with two symmetrical vertical arms R and L. A waist-shaped hole is formed in the R, a third small shaft (7-1) penetrates through the waist-shaped hole, threads are arranged on the part, penetrating through the waist-shaped hole, of the third small shaft (7-1), and the third small shaft (7-1) is tightly connected with two sides of the vertical arm R through two nuts (7-2) and (7-3), so that the third small shaft (7-1) is fixed on the vertical arm R. The other end of the third small shaft (7-1) is sleeved with a second roller (8), the second roller (8) is of a rolling bearing structure, an inner ring is fixedly sleeved on the third small shaft (7-1), and an outer ring is arranged in a groove of the sliding piece (9). Similarly, the vertical arm L is also provided with a small shaft and a roller having the same structure as the vertical arm R. The sliding piece (9) is sleeved on the first shaft (12), the first shaft (12) is arranged in the holes of the second perforated support (6-3) and the third perforated support (13-1), and the first shaft (12) can only rotate and cannot move linearly. As the second roller (8) is in contact with the groove on the sliding piece (9), when the U-shaped swing arm (5-2) swings, the sliding piece (9) moves linearly along the first shaft (12).
A key groove is formed in the first shaft (12), the length of the key groove is the same as that of the first shaft (12), and the length of the long key (10) is the same as that of the first shaft (12) and is arranged in the key groove of the first shaft (12). The step section on one side of the sliding piece (9) is provided with a hole, the sliding piece (9) and the long key (10) are fixed together through a screw (11), and therefore when the sliding piece (9) is driven by the U-shaped swing arm (5-2) to move linearly along the first shaft (12), the long key (10) and the sliding piece (9) move linearly relative to the first shaft (12).
The other end of the first shaft (12) is fixedly connected with the first shaft (12) and the U-shaped plate (14) through a screw (16), a partition plate (15) is arranged between the first shaft (12) and the U-shaped plate (14), the U-shaped plate (14) and the first shaft (12) form a whole, the whole can only rotate in holes of the second perforated support (6-3) and the third perforated support (13-1), and the whole cannot move linearly. The other end of the long key (10) positioned in the key groove of the first shaft (12) is fixed with the plate (17) through a screw (18-1), the rack plate (19) is fixed with the plate (17) through a screw (18-2), namely, the long key (10) and the rack plate (19) are fixed into a whole through the plate (17), and when the long key (10) moves linearly along the key groove on the shaft (12), the rack plate (19) also moves linearly.
As shown in figure 5, the U-shaped plate (14) consists of an upper plate (14-1), a vertical plate (14-2), a middle plate (14-3), a top column (14-4), a guide plate (14-5) and a bottom plate (14-6), all parts are welded and fixed into a whole, and the middle plate (14-3) and the bottom plate (14-6) are provided with holes for installing a crochet hook gear body (20). The rack plate (19) is composed of two parts, a guide part (19-1) and a rack body (19-2), and the guide part (19-1) is connected with the plate (17) through a screw (18-2). One side of the rack plate (19) is abutted against one surface of the guide plate (14-5), and when the rack plate (19) is driven by the long key (10) to move linearly, the guide plate (14-5) plays a role in guiding.
As shown in fig. 6, the upper crochet hook gear body (20) is composed of a head part (20-1), a gear (20-2), a column body (20-3) and an upper crochet hook (20-4).
As shown in figure 3, the cylinder (20-3) of the upper bearded needle gear body (20) is respectively arranged in the holes of the middle plate (14-3) and the bottom plate (14-6) of the U-shaped plate (14), and the upper bearded needle gear body (20) is axially positioned by a clamp spring so as to enable the upper bearded needle gear body to only rotate. When the rack plate (19) moves linearly, different parts of the rack body (19-2) on the rack plate are respectively meshed with the gears on the plurality of upper crochet hook gear bodies (20) to drive the rotation of the gears. Because the diameters of the gear parts on two adjacent upper crochet hook gear bodies (20) are larger, the movement interference of the diameters of the gear parts is avoided by adopting a gear dislocation mode.
As shown in figure 7, in the tail part of the vehicle, a U-shaped plate (14) is connected with a shaft (23) through a screw (21), the second shaft (23) is sleeved in a hole of a fourth support (24) with a hole, and the fourth support (24) with the hole is fixedly arranged on a tail wall plate (25).
The length of the U-shaped plate (14) and the rack plate (19) is the length of a weaving area of the whole machine, and the U-shaped plate (14) is arranged between the machine head and the machine tail through a first shaft (12) of the machine head part and a second shaft (23) of the machine tail part.
The motor, the belt transmission and the gear transmission (not shown in the figure) drive the main shaft (1) to rotate, which is the rotating power and the motion source of the middle and upper crochet hook of the utility model. The cylindrical cam (2) and the swinging follower form a primary cylindrical cam device, and the rotation of the main shaft (1) is converted into reciprocating swinging. The swing driven piece consists of a swing arm (5-1) and a U-shaped swing arm (5-2) which form a whole to swing around a fixed fulcrum small shaft, namely a second small shaft (6-1). The U-shaped swing arm (5-2), the roller (8) and the sliding piece (9) form a lantern ring device, and the swinging of the U-shaped swing arm (5-2) is converted into the linear movement of the sliding piece (9). A rack and pinion device is formed by the U-shaped plate (14) and the upper crochet hook gear body (20), and the linear movement of the U-shaped plate (14) is converted into the rotation of the upper crochet hook gear body (20).
Claims (3)
1. A crochet hook rotating device on a knotted fishing net machine is characterized by comprising a main shaft (1), a cylindrical cam (2) with a groove, a first roller (3), a second roller (8), a swinging driven part, a first small shaft (4-1), a second small shaft (6-1), a third small shaft (7-1), a first support with a hole (6-2), a second support with a hole (6-3), a third support with a hole (13-1), a fourth support with a hole (24), a sliding part (9) with a groove, a long key (10), a first shaft (12), a second shaft (23), a U-shaped plate (14), a plate (17), a rack plate (19) and an upper crochet hook gear body (20),
wherein,
the cylindrical cam (2) is arranged on the main shaft (1), the first roller (3) is arranged in a groove of the cylindrical cam (2), the first roller (3) is a rolling bearing, an outer ring of the first roller is in contact with the groove on the cylindrical cam (2), and an inner ring of the first roller is tightly sleeved on the first small shaft (4-1);
the cylindrical cam (2) and the swinging follower form a primary cylindrical cam device; the swing driven piece consists of a swing arm (5-1) and a U-shaped swing arm (5-2); the first small shaft (4-1) is fixed on the swing arm (5-1); the second small shaft (6-1) is arranged in a hole of the first support (6-2) with the hole;
the U-shaped swing arm (5-2) is provided with two symmetrical vertical arms (R) and (L), the third small shaft (7-1) is fixed on the vertical arm (R), the other end of the third small shaft (7-1) is sleeved with a second roller (8), the second roller (8) is a rolling bearing, an inner ring is fixedly sleeved on the third small shaft (7-1), an outer ring is arranged in a groove of the sliding piece (9), similarly, the vertical arm (L) is also provided with a small shaft and a roller which are completely the same as those on the vertical arm (R), and the U-shaped swing arm (5-2), the second roller (8) and the sliding piece (9) form a lantern ring device;
the first shaft (12) is arranged in holes of the second support (6-3) with holes and the third support (13-1) with holes, a key groove with the same length as the first shaft (12) is formed in the first shaft (12), a long key (10) with the same length as the first shaft (12) is arranged in the key groove, and the sliding part (9) is sleeved at one end of the first shaft (12) and fixed at one end of the long key (10); the other end of the first shaft (12) is fixed with the U-shaped plate (14) into a whole, the plate (17) is fixed at the other end of the long key (10), the rack plate (19) is fixedly connected with the plate (17), and the long key (10) and the rack plate (19) are fixed into a whole through the plate (17);
the U-shaped plate (14) consists of an upper plate (14-1), a vertical plate (14-2), a middle plate (14-3), a top column (14-4), a guide plate (14-5) and a bottom plate (14-6), all parts are fixed into a whole, holes are formed in the middle plate (14-3) and the bottom plate (14-6) and used for mounting an upper crochet hook gear body (20), and the U-shaped plate (14) and the upper crochet hook gear body (20) form a rack and gear device; the U-shaped plate (14) is connected with a second shaft (23), and the second shaft (23) is sleeved in a hole of a fourth support (24) with a hole;
the rack plate (19) consists of a guide part (19-1) and a rack body (19-2), the guide part (19-1) is connected with the plate (17), and the rack plate (19) is attached to the guide plate (14-5);
the upper crochet hook gear body (20) consists of a head (20-1), a gear (20-2), a cylinder (20-3) and an upper crochet hook (20-4), wherein the cylinder (20-3) of the upper crochet hook gear body (20) is arranged in holes of a middle plate (14-3) and a bottom plate (14-6) of a U-shaped plate, and the upper crochet hook gear body (20) is axially positioned by a clamp spring and can only rotate.
2. The crochet hook rotating device of the knotted fishing net machine according to claim 1, characterized in that the swing arm (5-1) is provided with a waist-shaped hole, and the first small shaft (4-1) passes through the waist-shaped hole and is fixed on the swing arm (5-1).
3. The crochet hook rotating device of the knotted fishing net machine according to claim 1, characterized in that the vertical arm (R) is provided with a waist-shaped hole, and the third small shaft (7-1) passes through the waist-shaped hole and is fixed on the vertical arm (R).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420180915.0U CN203904624U (en) | 2014-01-02 | 2014-04-15 | Rotating device for upper crochet hooks of knotted fishing net machine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420002273.5 | 2014-01-02 | ||
| CN201420002273 | 2014-01-02 | ||
| CN201420180915.0U CN203904624U (en) | 2014-01-02 | 2014-04-15 | Rotating device for upper crochet hooks of knotted fishing net machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203904624U true CN203904624U (en) | 2014-10-29 |
Family
ID=51778915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420180915.0U Expired - Lifetime CN203904624U (en) | 2014-01-02 | 2014-04-15 | Rotating device for upper crochet hooks of knotted fishing net machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203904624U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898675A (en) * | 2014-01-02 | 2014-07-02 | 海安纺织机械有限公司 | Upper bearded needle rotating device of knotted fishing net machine |
| CN110804800A (en) * | 2019-12-11 | 2020-02-18 | 巢湖市瀚海渔具有限公司 | Reciprocating driving device for fishing net braiding machine |
-
2014
- 2014-04-15 CN CN201420180915.0U patent/CN203904624U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898675A (en) * | 2014-01-02 | 2014-07-02 | 海安纺织机械有限公司 | Upper bearded needle rotating device of knotted fishing net machine |
| CN103898675B (en) * | 2014-01-02 | 2016-02-03 | 海安纺织机械有限公司 | There is crochet hook tumbler on knot fishing net machine |
| CN110804800A (en) * | 2019-12-11 | 2020-02-18 | 巢湖市瀚海渔具有限公司 | Reciprocating driving device for fishing net braiding machine |
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