A mechanism for moving the hook up and down in a fishing net machine

Abstract

The utility model relates to the field of fishing net machine, concretely relates to a fishing net machine lower hook needle up and down moving mechanism, including needle seat beam, swing arm and drive link, the needle seat beam lower extreme horizontal rotation installation has the main shaft, and the main shaft one end rolling installation is in the swing arm, drive link rotation installation is in the end of main shaft. Through moving a small distance again to the position after moving to the position on the lower hook needle and moving forward, it can push the knotted wire ring to the position, ensures that the nodule is not loose after the elastic of wire and rebounds, and through setting adjusting screw rod, thread sleeve and swing wheel etc. Structure, user only needs to rotate adjusting screw rod to change the equivalent eccentricity of swing wheel, thereby steplessly adjusting the moving stroke of the secondary forward movement of lower hook needle. Without changing any spare part, it can adapt to the fishing net weaving demand of different mesh specifications, significantly improves the versatility and production flexibility of fishing net machine.

Description

Technical Field

[0001] This utility model relates to the field of fishing net machines, and in particular to a mechanism for the up-and-down movement of the lower hook needle in a fishing net machine. Background Technology

[0002] The fishing net weaving machine is the core equipment in modern fishing net production. Through the precise coordination of upper and lower hooks, it completes a series of actions such as hooking, looping, and knotting the fishing net, thus weaving a uniformly sized net. The drive mechanism of the lower hook is the key component determining the weaving quality and efficiency.

[0003] Traditional hook drive mechanisms typically use a motor-driven cam-linkage mechanism to convert rotational motion into a strictly vertical up-and-down movement of the lower hook to coordinate with the upper hook for knotting. However, such traditional mechanisms are functionally limited, with their movement trajectory restricted to the vertical direction. They lack an auxiliary action that, after the main knotting action is completed, can drive the lower hook to make a slight horizontal "forward thrust" or "locking" motion. This deficiency results in loose knots, especially when using modern netting materials such as smooth multifilament yarn and polyethylene. Due to the high elasticity of the material, the vertical knotting action alone is insufficient to completely tighten the knots. These knots are easily loosened or even unraveled during subsequent processing or use due to the material's rebound, affecting the quality of the fishing net. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a mechanism for the up-and-down movement of the hook needle in a fishing net machine, so as to solve the technical problems in the prior art.

[0005] To achieve the above objectives, this utility model provides a mechanism for the up-and-down movement of the lower hook of a fishing net machine, including a needle seat beam, a swing arm, and a drive linkage. A main shaft is horizontally rotatably mounted on the lower end of the needle seat beam, and one end of the main shaft is rolled onto the swing arm. The drive linkage is rotatably mounted on the end of the main shaft for driving the swing arm to swing. The movement mechanism further includes: A first gear is fixedly connected at equal intervals to the surface of the main shaft; Multiple support plates are horizontally arranged on the needle seat beam, and a rotating shaft is rotatably installed at one end of the support plate. A second gear is fixedly connected to one end of the rotating shaft, and the second gear meshes with the first gear. A connecting column is fixedly installed at one end of the support plate, and the connecting column is fixedly installed on one side of the needle seat beam. A rotating disk is fixedly installed at the other end of the rotating shaft. A fixing frame is fixedly provided on the side of the rotating disk away from the rotating shaft. An adjusting screw is rotatably installed in the middle of the fixing frame. A threaded sleeve is threaded onto the surface of the adjusting screw. A swing wheel is fixedly connected to one side of the threaded sleeve. A guide groove is provided on the side of the swing wheel away from the threaded sleeve. A guide rod is rolled and fitted in the guide groove. A detachable hook is installed at the bottom of the guide rod, the middle part of the guide rod slides through the guide block, and one side of the guide block is fixedly connected to the surface of the support plate; A third gear fixed to one end of the main shaft; A rack is fixed to the side wall of the swing arm, and the rack engages with the third gear.

[0006] Preferably, a bearing is fitted onto the upper surface of the adjusting screw, the inner ring of the bearing is fixedly connected to the surface of the adjusting screw, and the outer ring of the bearing is fixedly connected to the inner wall of the fixing frame.

[0007] Preferably, the top of the guide rod is rotatably fitted with a rotating sleeve, which is rolled and embedded in the guide groove.

[0008] Preferably, a slider is integrally formed on one side of the guide rod, and a groove adapted to the slider is formed on the inner wall of the guide block. The slider is slidably embedded in the groove to form a sliding guide structure for the guide rod.

[0009] Preferably, the moving mechanism further includes a movable groove axially formed at the top of the adjusting screw, a movable rod slidably passing through the movable groove, and one end of the movable rod extending to the outside of the movable groove; A rotating disk is fixed to the top of the movable rod, and a locking element is fixedly provided on the top of the rotating disk, and the rotating disk engages with the locking element; A fixing ring is fixedly sleeved on the upper end of the adjusting screw, and a spring is fixedly connected between the top surface of the fixing ring and the bottom surface of the rotating disk. The spring is sleeved on the surface of the movable rod.

[0010] Preferably, the locking member includes a fixed end and an arc-shaped tooth. The fixed end is fixedly connected to the top of the rotating disk, and the arc-shaped tooth is fixedly disposed on the top of the fixed end and extends toward one side of the rotating disk.

[0011] Preferably, the sidewall of the rotating disk is provided with a plurality of toothed grooves at equal intervals along the circumference, and the arc-shaped teeth mesh with the toothed grooves.

[0012] Preferably, a pointer is fixedly connected to the side of the swing wheel facing the fixed frame, and a scale is fixedly provided on the side of the fixed frame facing the pointer, with the pointer cooperating with the scale.

[0013] The beneficial effects of this utility model are as follows: The lower hook needle moving mechanism of this utility model, after moving upwards and forwards to its designated position, moves forward a short distance again to push the knotted line loop into place. This ensures that the knot will not spring back and loosen due to the elasticity of the line after being tightened. By incorporating an adjusting screw, threaded sleeve, and oscillating wheel, the user only needs to rotate the adjusting screw to change the equivalent eccentricity of the oscillating wheel, thus steplessly adjusting the secondary forward movement stroke of the lower hook needle. Without replacing any parts, it can adapt to the weaving needs of fishing nets with different mesh sizes, significantly improving the versatility and production flexibility of the fishing net machine. By employing a rotating disc with a locking mechanism linked to the adjusting screw, along with a pointer and scale, the stroke adjustment process becomes intuitive and accurate. During operation, simply press and rotate the disc to complete the adjustment; it automatically locks upon release, effectively preventing accidental displacement during equipment operation and ensuring the reliability and repeatability of the adjustment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a bottom view of the present invention; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a top view of the present invention; Figure 5 This is a schematic diagram of a partial structure of the main shaft, support plate, and swing arm of this utility model; Figure 6 This is a schematic diagram of a partial structure of the rotating shaft, support plate, and swing wheel of this utility model; Figure 7 Left view of the exploded structure of the rotating shaft, rotating disk and swing wheel of this utility model; Figure 8 for Figure 7 Enlarged view of the structure at point B in the middle; Figure 9 The right view shows the exploded structure of the rotating shaft, rotating disk, and threaded sleeve of this utility model. Figure 10 This is a schematic cross-sectional view of the rotating disk, fixing frame, and adjusting screw of this utility model; Figure 11 for Figure 10 Enlarged view of the structure at point C.

[0016] The diagram is marked as follows: 1. Needle seat beam; 101. Main shaft; 102. Swing arm; 103. Drive linkage; 104. First gear; 105. Third gear; 106. Rack; 2. Rotating shaft; 201. Second gear; 3. Support plate; 301. Connecting column; 4. Rotating disk; 5. Fixing frame; 6. Adjusting screw; 601. Movable groove; 7. Threaded sleeve; 8. Swing wheel; 801. Guide groove; 9. Guide rod; 10. Lower hook needle; 11. Guide block; 12. Movable rod; 13. Rotating disk; 14. Fixing ring; 15. Spring; 16. Locking element; 17. Pointer; 18. Scale. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] The first aspect of this utility model proposes a mechanism for the up-and-down movement of the hook needle on a fishing net machine, such as... Figure 1-11As shown, the mechanism includes a needle seat beam 1, a swing arm 102, and a drive linkage 103. A main shaft 101 is horizontally rotatably mounted on the lower end of the needle seat beam 1, and one end of the main shaft 101 is rolled onto the swing arm 102. It should be noted that a deep groove ball bearing is coaxially fixedly mounted on the end of the main shaft 101 near the swing arm 102. A rectangular guide groove adapted to the outer ring of the bearing is formed along the length of the middle of the swing arm 102. The outer ring of the bearing is rolled into the guide groove, enabling the main shaft 101 to move horizontally along the guide groove and rotate. The drive linkage 103 is rotatably mounted on the end of the main shaft 101 to drive the swing arm 102 to swing. It should be noted that one end of the drive linkage 103 is rotatably connected to the end of the main shaft 101 via a universal joint, and the other end is rotatably connected to the power output crankshaft of the fishing net machine via a bearing housing. The crankshaft is driven to rotate by a motor, and the drive linkage 103 drives the main shaft 101 and the swing arm 102 to complete the swinging motion. The moving mechanism also includes: The first gear 104 is fixedly connected at equal intervals to the surface of the main shaft 101; Multiple support plates 3 are horizontally arranged on the needle seat beam 1, and a rotating shaft 2 is rotatably installed at one end of the support plate 3. A second gear 201 is fixedly connected to one end of the rotating shaft 2, and the second gear 201 meshes with the first gear 104. A connecting column 301 is fixedly installed at one end of the support plate 3, and the connecting column 301 is fixedly installed on one side of the needle seat beam 1. The up and down movement of the lower hook of the fishing net machine is driven by the rotation of the motor shaft, which drives the cam of a specific profile to rotate. The cam pushes its rotor, forcing the swing arm to swing. The motion is then transmitted to the swing arm 102 through the connecting rod. The swing arm 102 finally pushes the lower hook seat, causing it to move strictly vertically up and down along the guide column, thereby driving all the lower hooks to move synchronously. This is the existing technology and will not be described in detail. A rotating disk 4 is fixedly installed at the other end of the rotating shaft 2. A fixing frame 5 is fixedly installed on the side of the rotating disk 4 away from the rotating shaft 2. An adjusting screw 6 is rotatably installed in the middle of the fixing frame 5. A threaded sleeve 7 is threaded onto the surface of the adjusting screw 6. A swing wheel 8 is fixedly connected to one side of the threaded sleeve 7. A guide groove 801 is opened on the side of the swing wheel 8 away from the threaded sleeve 7. A guide rod 9 is rolled and fitted in the guide groove 801. It should be added that the two sides of the threaded sleeve 7 are slidably installed on the two sides of the inner wall of the fixed frame 5 to improve the stability of the linear movement of the threaded sleeve 7. It should also be added that strip-shaped slide rails are opened vertically on the opposite sides of the inner wall of the fixed frame 5. The two sides of the threaded sleeve 7 are integrally formed with sliders that are adapted to the slide rails. The sliders are slidably embedded in the slide rails to form a linear guide structure for the threaded sleeve 7, ensuring its stable movement along the axis of the adjusting screw 6.

[0020] The lower hook 10 is detachably installed at the bottom of the guide rod 9. The middle part of the guide rod 9 slides through the guide block 11, and one side of the guide block 11 is fixedly connected to the surface of the support plate 3. It should be noted that the lower hook 10 is fixedly installed at the bottom of the guide rod 9 by a locking screw, which is existing technology and will not be described in detail.

[0021] A third gear 105 is fixed to one end of the main shaft 101; A rack 106 is fixed to the side wall of the swing arm 102, and the rack 106 engages with the third gear 105. After the connecting rod transmits the motion to the swing arm 102, causing the swing arm 102 to drive the lower hook on the needle seat beam 1 to move upward to the highest point of its trajectory, it then drives the lower hook to move horizontally in the direction of the upper hook. During this movement, the needle seat beam 1 drives the main shaft 101 to move horizontally along the guide groove in the middle of the swing arm 102, so that the third gear 105 on the main shaft 101 meshes with the rack 106 on the side wall of the swing arm 102. At this time, the main shaft 101 rotates and meshes with the second gear 201 at one end of the rotating shaft 2 through the first gear 104 fixed on the surface, thereby driving the rotating shaft 2 and the rotating disk 4 to rotate. As the rotating shaft 2 and rotating disk 4 rotate, the fixed frame 5, adjusting screw 6, threaded sleeve 7, and oscillating wheel 8 rotate as a whole around the axis of the rotating shaft 2. Since the guide groove 801 on the oscillating wheel 8 is in rolling engagement with the rotating sleeve at the top of the guide rod 9, when the oscillating wheel 8 revolves, its guide groove 801 pushes the top of the guide rod 9, forcing the guide rod 9 to make reciprocating linear motion under the constraint of the guide block 11, thereby driving the lower hook needle 10 to complete the weaving action. This "secondary forward movement," after the main knotting action is completed, this small forward thrust can serve as a "final locking" step. It pushes the knotted loops into place, ensuring that the knots will not spring back and loosen due to the elasticity of the thread after tightening. This is crucial for using modern mesh yarns such as smooth multifilament yarns or polyethylene, as these materials are more prone to loosening.

[0022] When it is necessary to change the travel of the lower hook 10, the adjusting screw 6 is rotated. Since the threaded sleeve 7 is restricted from rotating by the swing wheel 8 and its connecting structure, when the adjusting screw 6 is rotated, the threaded sleeve 7 will drive the swing wheel 8 to move up or down along the axis of the adjusting screw 6, thereby changing the equivalent eccentricity between the rotation center of the swing wheel 8 and the contact point of the guide rod 9. This change in eccentricity directly determines the travel of the guide rod 9 and the lower hook 10, realizing stepless adjustment of the travel of the lower hook 10 without replacing any parts, which greatly enhances the adaptability of the fishing net machine to different mesh sizes.

[0023] In this embodiment, a bearing is fitted onto the upper surface of the adjusting screw 6. The inner ring of the bearing is fixedly connected to the surface of the adjusting screw 6, and the outer ring of the bearing is fixedly connected to the inner wall of the fixing frame 5. The bearing enables the rotatable connection between the adjusting screw 6 and the fixing frame 5, thereby improving the stability of the adjusting screw 6 during rotation.

[0024] In this embodiment, a rotating sleeve is rotatably fitted onto the top of the guide rod 9, and the rotating sleeve is rolled and embedded in the guide groove 801. This reduces frictional loss between the guide rod 9 and the rotating wheel 8 as the swing wheel 8 rotates with the rotating disk 4.

[0025] In this embodiment, a slider is integrally formed on one side of the guide rod 9, and a groove adapted to the slider is formed on the inner wall of the guide block 11. The slider is slidably embedded in the groove to form a sliding guide structure for the guide rod 9. The sliding connection between the guide rod 9 and the inner wall of the guide block 11 further improves the stability of the movement of the guide rod 9.

[0026] In this embodiment, the moving mechanism further includes an axially formed movable groove 601 at the top of the adjusting screw 6. A movable rod 12 is slidably inserted into the movable groove 601, with one end of the movable rod 12 extending to the outside of the movable groove 601. It should be noted that the movable rod 12 and the movable groove 601 are slidably connected by a key or spline. A flat key groove is formed along the axial direction on the inner wall of the movable groove 601. A flat key that matches the flat key groove is integrally formed on the side wall of the movable rod 12. The flat key is slidably embedded in the flat key groove, so that the movable rod 12 can slide along the axial direction of the movable groove 601 and can drive the adjusting screw 6 to rotate synchronously.

[0027] A rotating disk 13 is fixed to the top of the movable rod 12. A locking element 16 is fixedly provided on the top of the rotating disk 4. The rotating disk 13 and the locking element 16 are engaged. A fixing ring 14 is fixedly sleeved on the upper end of the adjusting screw 6. A spring 15 is fixedly connected between the top surface of the fixing ring 14 and the bottom surface of the rotating disk 13. The spring 15 is sleeved on the surface of the movable rod 12. When the adjusting screw 6 is rotated, the rotating disk 13 is pressed down by hand to compress the spring 15, causing the toothed groove on the side of the rotating disk 13 to disengage from the arc-shaped teeth of the locking member 16 fixed on the rotating disk 4. At this time, the movable rod 12 at the top of the adjusting screw 6 can slide in the movable groove 601. However, the adjusting screw 6 itself is slidably connected to the rotating disk 13 by a key or spline, so that the rotating disk 13 can drive the adjusting screw 6 to rotate together. Rotating the rotating disk 13 drives the adjusting screw 6 to rotate, thereby adjusting the eccentricity of the swing wheel 8. The larger the equivalent eccentricity of the swing wheel 8, the greater the travel of the guide rod 9; conversely, the smaller the eccentricity, the smaller the travel.

[0028] After the rotating disk 13 is released, it will automatically engage and lock with the locking element 16 under the elastic reset action of the spring 15, preventing the mechanism from shifting due to vibration or other reasons during operation. The operation is simple and quick.

[0029] In this embodiment, the locking member 16 includes a fixed end and an arc-shaped tooth. The fixed end is fixedly connected to the top of the rotating disk 4, and the arc-shaped tooth is fixedly disposed on the top of the fixed end and extends toward the rotating disk 13.

[0030] In this embodiment, the sidewall of the rotating disk 13 is provided with multiple grooves at equal intervals along the circumference, and the arc-shaped teeth mesh with the grooves. The locking and positioning of the rotating disk 13 is achieved through the cooperation between the grooves and the arc-shaped teeth on the sidewall of the rotating disk 13.

[0031] In this embodiment, a pointer 17 is fixedly connected to the side of the swing wheel 8 facing the fixed frame 5, and a scale 18 is fixedly installed on the side of the fixed frame 5 facing the pointer 17. The pointer 17 cooperates with the scale 18. When adjusting the distance of the swing wheel 8, the pointer 17 on the fixed frame 5 and the pointer 17 on the swing wheel 8 can be observed. When the pointer 17 indicates the desired scale position, the rotation of the rotating disk 13 can be stopped, thus facilitating the observation of the movement distance of the swing wheel 8.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0033] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mechanism for the up-and-down movement of the hook needle on a fishing net machine, characterized in that, The mechanism includes a needle seat beam (1), a swing arm (102), and a drive link (103). A main shaft (101) is horizontally rotatably mounted on the lower end of the needle seat beam (1), and one end of the main shaft (101) is rolled onto the swing arm (102). The drive link (103) is rotatably mounted on the end of the main shaft (101) and is used to drive the swing arm (102) to swing. The moving mechanism also includes: The first gear (104) is fixedly connected to the surface of the main shaft (101) at equal intervals. Multiple support plates (3) are horizontally arranged on the needle seat beam (1), and a rotating shaft (2) is rotatably installed at one end of the support plate (3). A second gear (201) is fixedly connected to one end of the rotating shaft (2), and the second gear (201) meshes with the first gear (104). A connecting column (301) is fixedly installed at one end of the support plate (3), and the connecting column (301) is fixedly installed on one side of the needle seat beam (1). A rotating disk (4) is fixedly installed at the other end of the rotating shaft (2). A fixing frame (5) is fixedly installed on the side of the rotating disk (4) away from the rotating shaft (2). An adjusting screw (6) is rotatably installed in the middle of the fixing frame (5). A threaded sleeve (7) is threaded onto the surface of the adjusting screw (6). A swing wheel (8) is fixedly connected to one side of the threaded sleeve (7). A guide groove (801) is provided on the side of the swing wheel (8) away from the threaded sleeve (7). A guide rod (9) is rolled and fitted in the guide groove (801). A detachable hook (10) is installed at the bottom of the guide rod (9). The middle part of the guide rod (9) slides through the guide block (11). One side of the guide block (11) is fixedly connected to the surface of the support plate (3). A third gear (105) is fixed to one end of the main shaft (101). A rack (106) is fixed to the side wall of the swing arm (102), and the rack (106) cooperates with the third gear (105).

2. The fishing net machine hook moving up and down mechanism according to claim 1, characterized in that, The upper surface of the adjusting screw (6) is fitted with a bearing, the inner ring of the bearing is fixedly connected to the surface of the adjusting screw (6), and the outer ring of the bearing is fixedly connected to the inner wall of the fixing frame (5).

3. The fishing net machine hook moving up and down mechanism according to claim 1, characterized in that, The top of the guide rod (9) is rotatably fitted with a rotating sleeve, which is rolled and embedded in the guide groove (801).

4. The fishing net machine hook moving up and down mechanism according to claim 3, characterized in that, The guide rod (9) has a slider integrally formed on one side. The inner wall of the guide block (11) is provided with a groove that matches the slider. The slider is slidably embedded in the groove to form a sliding guide structure of the guide rod (9).

5. The fishing net machine hook moving up and down mechanism according to claim 2, characterized in that, The moving mechanism also includes an axially formed movable groove (601) on the top of the adjusting screw (6), a movable rod (12) is slidably passed through the movable groove (601), and one end of the movable rod (12) extends to the outside of the movable groove (601); A rotating disk (13) is fixed to the top of the movable rod (12), and a locking member (16) is fixedly provided on the top of the rotating disk (4). The rotating disk (13) and the locking member (16) are engaged. A fixed ring (14) is fixedly sleeved on the upper end of the adjusting screw (6). A spring (15) is fixedly connected between the top surface of the fixed ring (14) and the bottom surface of the rotating disk (13). The spring (15) is sleeved on the surface of the movable rod (12).

6. The fishing net machine hook moving up and down mechanism according to claim 5, characterized in that, The locking member (16) includes a fixed end and an arc-shaped tooth. The fixed end is fixedly connected to the top of the rotating disk (4), and the arc-shaped tooth is fixedly disposed on the top of the fixed end and extends toward the rotating disk (13).

7. The fishing net machine hook moving up and down mechanism according to claim 6, characterized in that, The sidewall of the rotating disk (13) is provided with multiple toothed grooves at equal intervals along the circumference, and the arc-shaped teeth mesh with the toothed grooves.

8. The fishing net machine hook moving up and down mechanism according to claim 1, characterized in that, The swing wheel (8) is fixedly connected to a pointer (17) on the side facing the fixed frame (5), and a scale (18) is fixedly installed on the side facing the pointer (17) of the fixed frame (5), with the pointer (17) cooperating with the scale (18).

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