Rock trawl
By using limiting fasteners and a multi-ring structure, the problem of unstable connection at the rock trawl connection point is solved, achieving a stable connection when retrieving hard objects and ensuring the continuous use of the rock trawl.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN UNIV
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-17
AI Technical Summary
The metal outer mesh connection end of conventional rock trawl nets is prone to movement due to excessive force, resulting in low stability and affecting continuous use.
By employing limiting fasteners and a multi-ring structure, the movement of the collar on the connecting rod is restricted through a combination of a collar, a first ring, a second ring, and a long screw, ensuring the stability of the connection.
The robustness of the rock trawl net has been improved, ensuring that the connecting ends do not move when retrieving hard objects, and supporting continuous operation.
Smart Images
Figure CN224136933U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a rock trawl net. Background Technology
[0002] Rock trawls are a common geological sampling device widely used in cobalt-rich crust surveys and marine geological surveys. Their primary objective is to obtain samples of hard seabed rocks and crusts. In daily use, because rock trawls target hard seabed rocks and similar materials, the fixed ends of the outer metal mesh must be securely connected. Otherwise, if one end detaches, the force distributed across the metal mesh will be disrupted, leading to uneven force distribution and hindering subsequent use. Conventional methods use a connecting rod and a nut for securing the outer metal mesh. While this provides some stability, the connection is still susceptible to movement under excessive force, even with the nut, making continuous use of the trawl impossible. Utility Model Content
[0003] This invention provides a rock trawl net that can effectively solve the above-mentioned problems.
[0004] This utility model is implemented as follows:
[0005] A rock trawl net includes a metal outer mesh mounted on a trailer body, a net bag located at the bottom of the trailer body, side traction frames located on both sides of the trailer body, and several [unclear - possibly related to a number of traction nets] arranged around the perimeter of the trailer body.
[0006] Linkage rod, used for connection to the metal outer mesh;
[0007] A collar is disposed on the outer wall of the connecting rod, the outer wall of the collar having a second groove, an annular retaining ring disposed at one end of the collar, and a limiting and fixing member disposed inside the second groove, for limiting the rotation of the collar;
[0008] The first ring is disposed on the outer wall of the connecting rod and located behind the collar, and an annular groove is formed at the front end of the first ring;
[0009] The second ring is disposed on the outer wall of the connecting rod and in front of the collar, and at least two long screws are disposed on the second ring;
[0010] The first ring, the collar, and the second ring are sequentially fitted onto the connecting rod. The annular retaining ring on the collar is inserted into the first ring, and the limiting and fixing member connects the collar and the connecting rod. The long screw on the second ring is connected to the limiting and fixing member, thereby restricting the movement of the collar on the connecting rod.
[0011] As a further improvement, the limiting and fixing component includes a limiting frame, plug-in blocks symmetrically arranged at the upper and lower ends of the limiting frame, a plug-in rod arranged on one side of the limiting frame, an auxiliary plate arranged in the middle of the limiting frame, and a mating groove and a recessed groove formed at one end of the auxiliary plate.
[0012] As a further improvement, a pull rod is symmetrically arranged on both sides of the outer ring of the annular groove at one end of the first ring, and a bend is provided at one end of the pull rod.
[0013] As a further improvement, the bent portion on the pull rod is inserted into the docking groove formed on the auxiliary plate, and the end of the bent portion is engaged with the recessed groove to form a limiting and fixing structure.
[0014] As a further improvement, the inner diameter of the mating groove is smaller than the width of the bend.
[0015] As a further improvement, the upper and lower ends of the second groove are respectively formed with slots corresponding to the plug-in block.
[0016] As a further improvement, the recessed groove has a depth D, where 0.2 mm ≤ D ≤ 0.5 mm.
[0017] As a further improvement, a hook is provided on the outer wall of the collar 7.
[0018] The beneficial effects of this utility model are:
[0019] (1) In this utility model, the first ring, the collar and the second ring are sequentially sleeved on the connecting rod. The annular retaining ring on the collar is inserted into the first ring, and the limiting and fixing member connects the collar and the connecting rod. The long screw on the second ring is connected to the limiting and fixing member, thereby restricting the movement of the collar on the connecting rod. This ensures that the connecting end will not move due to the excessive weight of the collected object when the trawl net is in use, thus improving the firmness of the trawl net and facilitating the continuous operation of the trawl net. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 This is the front view of this utility model.
[0022] Figure 2 This is a schematic diagram of the connecting rod of this utility model.
[0023] Figure 3 This is an exploded view of this utility model.
[0024] Figure 4 This is an enlarged view of utility model A.
[0025] Explanation of icon numbers:
[0026] 1. Tractor body; 2. Side towing frame;
[0027] 3. Connecting rod; 30. First slot; 31. Insertion hole;
[0028] 4. Metal outer mesh; 5. Mesh bag;
[0029] 6. First ring; 60. Tie rod; 61. Bending section; 62. Annular groove;
[0030] 7. Collar; 70. Annular retaining ring; 71. Second groove; 72. Groove opening; 73. Limiting bracket; 74. Insertion block; 75. Insertion rod; 76. Auxiliary plate; 77. Connecting groove; 78. Recessed groove;
[0031] 8. Second ring; 80. Long screw;
[0032] 9. Hooks. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.
[0034] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0035] Reference Figure 1-4As shown, a rock trawl net includes a metal outer mesh 4 mounted on a trailer body 1, a mesh bag 5 located at the bottom of the trailer body 1, and side traction frames 2 located on both sides of the trailer body 1. Several connecting rods 3 are arranged around the trailer body 1 for connecting to the metal outer mesh 4. The upper and lower ends of the second groove 71 are respectively formed with slots 72 corresponding to the insertion blocks 74.
[0036] The first ring 6 is located on the outer wall of the connecting rod 3 and behind the collar 7. The front end of the first ring 6 has an annular groove 62. One end of the first ring 6 is symmetrically arranged with a pull rod 60 on both sides of the outer ring of the annular groove 62, and a bent portion 61 is provided at one end of the pull rod 60.
[0037] The bending part 61 is made of metal. The bending part 61 made of metal has higher strength than that of composite materials and will not break easily.
[0038] A collar 7 is disposed on the outer wall of the connecting rod 3. The outer wall of the collar 7 has a second groove 71. An annular retaining ring 70 is disposed at one end of the collar 7. A limiting and fixing member is disposed inside the second groove 71 to limit the rotation of the collar 7. The limiting and fixing member includes a limiting frame 73, insert blocks 74 symmetrically disposed at the upper and lower ends of the limiting frame 73, insert rod 75 disposed on one side of the limiting frame 73, auxiliary plate 76 disposed in the middle of the limiting frame 73, and a mating groove 77 and a recessed groove 78 formed at one end of the auxiliary plate 76. A hook 9 is disposed on the outer wall of the collar 7.
[0039] The second ring 8 is located on the outer wall of the connecting rod 3 and in front of the collar 7. At least two long screws 80 are provided on the second ring 8. The long screws 80 can be connected to the screw holes on the other side of the limiting frame 73, so that the limiting frame 73 can be fixed three times.
[0040] In use, the first ring 6, the collar 7, and the second ring 8 are sequentially fitted onto the connecting rod 3. The annular retaining ring 70 on the collar 7 is inserted into the first ring 6, and the second groove 71 on the collar 7 is aligned with the first groove 30 on the connecting rod 3. (It should be noted that in order to ensure that the insertion rod 75 on one side of the limit frame 73 can be inserted into the insertion hole 31 in the first groove 30, there must be a misalignment between the first groove 30 and the second groove 71. That is, the opening size of either the first groove 30 or the second groove 71 is larger, so that the two grooves can form a misalignment relationship.) At this time, the bent part 61 on the pull rod 60 is inserted into the auxiliary plate 76 to form a... In the groove 77, the end of the bent part 61 engages with the recessed groove 78 to form a limiting and fixing structure. Then, the limiting frame 73 in the limiting and fixing component is embedded into the first groove 30 and the second groove 71, thereby restricting the collar 7 and the connecting rod 3. During the embedding process, the plug block 74 on the limiting frame 73 will connect with the groove 72, and the limiting frame 73 will be fixed. Next, the second ring 8 is connected to the connecting rod 3. As the second ring 8 moves, the long screw 80 on the second ring 8 will connect with the screw hole (not shown in the figure) on the other side of the limiting frame 73, thereby restricting and fixing the first ring 6, the collar 7 and the second ring 8, and also restricting the movement of the collar 7 on the connecting rod 3.
[0041] Furthermore, the auxiliary plate 76 can also serve as a disassembly point for subsequent disassembly work, allowing the auxiliary plate 76 to be pulled out directly using tools. Even further, the auxiliary plate 76 can also act as a support; when the collar 7 is under force and needs to rotate, the auxiliary plate 76 can increase the support strength of the limit frame 73, strengthening the limit frame 73 and preventing potential damage to it.
[0042] The recessed groove 78 has a depth D, where 0.2 mm ≤ D ≤ 0.5 mm. In one embodiment, D is approximately 0.25 mm to prevent the bent portion 61 from dislodging from the mating groove 77. If the depth is too deep, it may prevent the bent portion 61 from being dislodged from the recessed groove 78; if the depth is too shallow, it may prevent the bent portion 61 from being properly connected and secured to the recessed groove 78.
[0043] The inner diameter of the mating groove 77 is smaller than the width of the bent portion 61. Furthermore, the width of the bent portion 61 is slightly larger than the inner diameter of the mating groove 77. This is because the bent portion 61 is made of metal and has a certain degree of flexibility. If the inner diameter is too large, the bent portion 61 will move within the mating groove 77, resulting in poor fastening. When the inner diameter is smaller than the width, the flexibility of the metal material itself allows the bent portion 61 to be engaged within the mating groove 77. Simultaneously, the end of the bent portion 61 connects with the recessed groove 78, thus achieving the desired effect.
[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A rock drag net comprising a metal outer net (4) provided on a drag body (1), a bag (5) provided at the bottom of the drag body (1), and side pull frames (2) provided on both sides of the drag body (1), characterized in that, The trailer body (1) is surrounded by several Link (3) is used to connect to the metal outer mesh (4); A collar (7) is provided on the outer wall of the connecting rod (3). A second groove (71) is formed on the outer wall of the collar (7). An annular retaining ring (70) is provided at one end of the collar (7). A limiting and fixing member is provided inside the second groove (71) to restrict the rotation of the collar (7). The first ring (6) is disposed on the outer wall of the connecting rod (3) and located behind the collar (7). The front end of the first ring (6) has an annular groove (62). The second ring (8) is disposed on the outer wall of the connecting rod (3) and in front of the collar (7), and at least two long screws (80) are provided on the second ring (8). The first ring (6), the collar (7) and the second ring (8) are sequentially sleeved on the connecting rod (3). The annular retaining ring (70) on the collar (7) is inserted into the first ring (6), and the limiting and fixing member connects the collar (7) and the connecting rod (3). The long screw (80) on the second ring (8) is connected to the limiting and fixing member, thereby restricting the movement of the collar (7) on the connecting rod (3).
2. A rock drag according to claim 1, characterised in that The limiting and fixing component includes a limiting frame (73), plug-in blocks (74) symmetrically arranged at the upper and lower ends of the limiting frame (73), a plug-in rod (75) arranged on one side of the limiting frame (73), an auxiliary plate (76) arranged in the middle of the limiting frame (73), and a docking groove (77) and a recessed groove (78) formed at one end of the auxiliary plate (76).
3. A rock trawl net according to claim 2, characterized in that, One end of the first ring (6) is symmetrically arranged on both sides of the outer ring of the annular groove (62) with a pull rod (60) and a bend (61) at one end of the pull rod (60); the bend (61) on the pull rod (60) is inserted into the docking groove (77) formed on the auxiliary plate (76), and the end of the bend (61) is engaged with the recessed groove (78) to form a limiting and fixing structure.
4. A rock drag according to claim 3, characterised in that The inner diameter of the docking groove (77) is smaller than the width of the bent portion (61).
5. A rock drag according to claim 2, wherein, The upper and lower ends of the second groove (71) are respectively formed with slots (72) corresponding to the plug-in block (74).
6. A rock drag according to claim 2, wherein, The recessed groove (78) has a depth D, where 0.2 mm ≤ D ≤ 0.5 mm.
7. A rock trawl net according to claim 1, characterized in that, A hook (9) is provided on the outer wall of the collar (7).