Swivel structure for protecting inductive coupling transmission anti-torsion device of offshore buoy

Abstract

The utility model relates to the technical field of marine buoy data transmission equipment, in particular to a swivel structure for protecting an inductive coupling transmission anti-torsion device of a marine buoy, which comprises a connecting assembly, a protecting assembly, a supporting assembly and a fixing assembly, the protection assembly is fixedly connected with the supporting assembly and the fixing assembly, the connecting assembly comprises a first connecting shackle and a second connecting shackle, the protection assembly is composed of an upper ring and a lower ring, and the fixing assembly comprises an upper fixing sliding block, a lower fixing sliding block and a plastic-coated steel cable mounting bolt. The cage-shaped structure formed by the vertical rod of the supporting assembly and the upper ring and the lower ring of the protection assembly is adopted, the anti-torsion rotating ring is protected inside, the upper ring surrounds the outer side of the anti-torsion rotating ring, sundries such as a fishing net can be effectively prevented from directly winding the anti-torsion rotating ring, the rotating ring is prevented from being clamped due to winding, and normal operation of the device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of marine buoy data transmission equipment, and in particular to a rotating ring structure for protecting the anti-torsion device of marine buoy inductive coupling transmission. Background Technology

[0002] In the field of marine monitoring, marine buoys are key devices for acquiring marine data, and their stable operation and accurate data transmission are crucial. Inductive coupling transmission technology, with its unique advantages, has become a common method for real-time data transmission from underwater buoy observation sensors. This technology utilizes sensors installed on the underwater buoy's mooring system, forming a closed circuit with the help of water and a plastic-coated steel cable. Data is transmitted in real-time to an underwater host computer via electromagnetic induction coupling, and then connected to the buoy's data acquisition processor via a watertight vulcanized cable.

[0003] However, the extremely harsh marine environment presents numerous challenges to buoy data transmission. Under the influence of wind, waves, and currents, buoys experience six degrees of freedom of swaying, rotation, and coupled motion. Since the data transmission cable is connected to the data acquisition processor inside the buoy, the buoy's swaying and rotational motions cannot be synchronized with the anchorage, making the cable extremely prone to breakage. Once the cable breaks, data transmission is interrupted, resulting in the loss of coupled observation data for the entire buoy system and severely impacting the buoy's ability to continuously observe underwater data.

[0004] To address this issue, the industry has developed an inductive coupling transmission anti-torsion device, which is installed on the upper end of the plastic-coated steel cable of the buoy anchor. However, currently, after a period of operation, the rotating ring of the inductive coupling transmission anti-torsion device frequently malfunctions. Debris such as fishing nets and seaweed in the ocean easily become entangled in the rotating ring, causing it to jam and become unable to rotate. The jammed rotating ring not only causes the insulation layer of the plastic-coated steel cable to crack due to uneven stress, resulting in the loss of underwater observation data from the buoy, but in more serious cases, it can cause the plastic-coated steel cable to break, the buoy to shift, and all underwater observation sensors to be lost, causing huge losses to marine monitoring work. At present, there is a need for a rotating ring structure to protect the inductive coupling transmission anti-torsion device of marine buoys. Utility Model Content

[0005] To address the problems of cable breakage due to buoy swaying and swivel jamming due to marine debris, this invention provides a swivel structure to protect the anti-torsion device of the inductive coupling transmission system for marine buoys.

[0006] This utility model provides a rotating ring structure for protecting the anti-torsion device of the inductive coupling transmission system for marine buoys, employing the following technical solution:

[0007] A rotating ring structure for protecting the anti-torsion device of the inductive coupling transmission of a marine buoy includes:

[0008] The system includes a connecting component, a protective component, a supporting component, and a fixing component, wherein the lower end of the connecting component is connected to the supporting component, and the protective component is fixedly connected to both the supporting component and the fixing component.

[0009] The connecting assembly includes a first connecting shackle and a second connecting shackle. The protective assembly consists of an upper ring and a lower ring. The second connecting shackle is installed on the upper end of the upper ring. The supporting assembly includes multiple vertical rods, a fixed mounting plate, a rotating mounting plate, a rotating mounting plate below the plate, and an underwater host computer mounting plate. The top and bottom ends of the vertical rods are respectively connected to the upper ring and the lower ring. The fixing assembly includes an upper fixed slider, a lower fixed slider, and a plastic-coated steel cable mounting bolt.

[0010] Furthermore, the upper end of the first connecting shackle is connected to the mooring eye plate at the root of the buoy by bolts, the lower end of the first connecting shackle is connected to the upper end of the second connecting shackle by a shackle pin, and the lower end of the second connecting shackle is connected to the anti-torsion swivel by a bearing.

[0011] Furthermore, the upper ring wraps around the outside of the anti-torsion swivel and connects to the top of the vertical rod of the support assembly, and the lower ring wraps around the outside of the plastic-coated steel cable and connects to the bottom of the vertical rod. The connection points of the lower ring and the upper ring with the vertical rod both form an oblique angle within a certain range.

[0012] Furthermore, anti-torsion rotating rings are provided at the middle positions of the fixed mounting plate, the upper rotating mounting plate, the lower rotating mounting plate, and the underwater host computer mounting plate. The fixed mounting plate and the underwater host computer mounting plate are fixedly connected to the vertical rod, and the upper rotating mounting plate and the lower rotating mounting plate are rotatably connected to the vertical rod.

[0013] Furthermore, the underwater host computer mounting plate is connected to the vertical rod of the support component through a slot to achieve circumferential positioning and axial limiting. The underwater host computer mounting plate is provided with an installation interface adapted to underwater equipment.

[0014] Furthermore, a bearing is provided at the connection between the upper rotating mounting plate and the vertical rod. The bearing is a deep groove ball bearing, the inner ring of the bearing is interference-fitted with the vertical rod, and the outer ring of the bearing is connected to the upper rotating mounting plate by bolts.

[0015] Furthermore, the anti-torsion swivel is installed inside the cage-like structure formed by the vertical rod of the support component and the upper and lower rings of the protective component to protect the plastic-coated steel cable.

[0016] Furthermore, the upper fixed slider is installed at the bottom end of the upper rotating mounting plate, and the lower fixed slider is installed at the bottom end of the lower ring. Both the upper and lower fixed sliders are provided with slots inside, and the outer side of the plastic-coated steel cable is provided with protruding ribs that match the slots. The circumferential positioning of the upper fixed slider and the plastic-coated steel cable is achieved by the protruding ribs being embedded into the slots.

[0017] Furthermore, both the upper and lower fixed sliders are provided with an anti-slip rubber layer on the side that is in contact with the plastic-coated steel cable.

[0018] Furthermore, the end of the plastic-coated steel cable is provided with a ferrule, which is inserted into the forked eye plate below the anti-torsion ring. The plastic-coated steel cable mounting bolts laterally fix the ferrule of the plastic-coated steel cable inside the forked eye plate.

[0019] In summary, this utility model has the following beneficial technical effects:

[0020] 1. This utility model adopts a cage-like structure consisting of a vertical rod of the support component and an upper and lower ring of the protective component, which protects the anti-torsion swivel ring inside. The upper ring surrounds the outside of the anti-torsion swivel ring, and the vertical rod connects the upper and lower rings. This effectively prevents fishing nets and other debris from directly wrapping around the anti-torsion swivel ring, avoiding the swivel ring from getting stuck due to wrapping, ensuring the normal operation of the device, and reducing problems such as cracking of the insulation layer of the plastic-coated steel cable, data loss, and cable breakage caused by the swivel ring getting stuck.

[0021] 2. This utility model provides stable support for each mounting plate and the entire device through multiple vertical rods, so that the local structure of the device is subjected to symmetrical force under the hydrodynamic action of the buoy. The fixed mounting plate, the rotating mounting plate, the bottom of the rotating mounting plate and the underwater host computer mounting plate are all fixedly connected to the vertical rods, which enhances the stability of the overall structure and improves the structural strength and service life of the anti-torsion device.

[0022] 3. In this utility model, the upper and lower fixed sliders are installed on the plastic-coated steel cable. The internal grooves cooperate with the outer protrusions of the plastic-coated steel cable to achieve circumferential positioning. The side that is in contact with the plastic-coated steel cable is provided with an anti-slip rubber layer to prevent the plastic-coated steel cable from rubbing against other structural components, avoid damage to the cable sheath, and ensure the stability of data transmission. At the same time, the anti-torsion swivel ring is installed in the middle of each key mounting plate, which allows the data transmission cable to rotate synchronously with the buoy body. This ensures that the rotation of the buoy body does not affect the operation of the underwater host computer and observation sensors on the anchor system below, and ensures the normal realization of the inductive coupling transmission function.

[0023] 4. This utility model uses an underwater host computer mounting plate connected to a vertical rod via a slot, achieving not only circumferential positioning and axial limiting, but also facilitating installation and disassembly. It also features an installation interface on top suitable for underwater equipment, making it easy to install different underwater devices. Attached Figure Description

[0024] Figure 1 This is an overall structural diagram of the rotating ring of a protective inductive coupling transmission anti-torsion device for marine buoys according to Embodiment 1 of this utility model.

[0025] Figure 2This is a left view of the rotating ring of an inductive coupling transmission anti-torsion device for protecting marine buoys according to Embodiment 1 of this utility model.

[0026] Figure 3 This is a front view of the rotating ring of an anti-torsion device for inductive coupling transmission of marine buoys according to Embodiment 1 of this utility model.

[0027] Figure 4 This is a schematic diagram of the plastic-coated steel cable structure of the rotating ring of the anti-torsion device for inductive coupling transmission of marine buoys according to Embodiment 1 of this utility model.

[0028] Figure 5 This is a connection structure diagram of the plastic-coated steel cable installation bolt in Embodiment 1 of this utility model.

[0029] The components include: 1. Mooring eyeplate; 2. Coupler cable; 3. First connecting shackle; 4. Second connecting shackle; 5. Upper ring; 6. Vertical rod; 7. Fixed mounting plate; 8. First anti-torsion swivel ring; 9. Plastic-coated steel cable mounting bolt; 10. Plastic-coated steel cable; 11. Upper rotating mounting plate; 12. Upper fixed slider; 13. Underwater host computer mounting plate; 14. Lower rotating mounting plate; 15. Lower ring; 16. Lower fixed slider; 17. Heart-shaped ring; 18. Forked eyeplate. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings. Example 1

[0031] Reference Figure 1 The rotating ring structure of the inductive coupling transmission anti-torsion device for protecting marine buoys according to this embodiment includes:

[0032] The system includes a connecting component, a protective component, a supporting component, and a fixing component, wherein the lower end of the connecting component is connected to the supporting component, and the protective component is fixedly connected to both the supporting component and the fixing component.

[0033] The connecting assembly includes a first connecting shackle and a second connecting shackle. The protective assembly consists of an upper ring and a lower ring. The second connecting shackle is installed on the upper end of the upper ring. The supporting assembly includes multiple vertical rods, a fixed mounting plate, a rotating mounting plate, a rotating mounting plate below the plate, and an underwater host computer mounting plate. The top and bottom ends of the vertical rods are respectively connected to the upper ring and the lower ring. The fixing assembly includes an upper fixed slider, a lower fixed slider, and a plastic-coated steel cable mounting bolt.

[0034] Specifically, it includes the following:

[0035] like Figure 1 , Figure 2 and Figure 3The connecting assembly shown is a key part of the connection between the entire device and the buoy, consisting of a first connecting shackle 3 and a second connecting shackle 4. First, the upper end of the first connecting shackle 3 is connected to the mooring eye plate 1 at the root of the buoy using high-strength bolts. During installation, mounting holes for the matching bolts are drilled at corresponding positions on the mooring eye plate 1 at the root of the buoy and the first connecting shackle 3. After cleaning impurities from the holes, an appropriate amount of thread-locking adhesive is applied, and the bolts are passed through the mounting holes to ensure the stability of the connection, enabling it to withstand the significant tensile force generated by the buoy during its movement. The first connecting component and the second connecting shackle 4... Both connecting parts adopt a ring structure, and the two interlock to complete the connection. For ease of description, the anti-torsion swivel is divided into the first anti-torsion swivel 8, the second anti-torsion swivel, the third anti-torsion swivel, and the fourth anti-torsion swivel. The first anti-torsion swivel 8, the second anti-torsion swivel, the third anti-torsion swivel, and the fourth anti-torsion swivel represent the anti-torsion swivels that are connected to the fixed mounting plate 7, the upper rotating mounting plate 11, the underwater host computer mounting plate 13, and the lower rotating mounting plate 14, respectively. Finally, the lower end of the second connecting shackle 4 is connected to the first anti-torsion swivel 8 through a bearing.

[0036] The protective assembly consists of an upper ring 5 and a lower ring 15, which play a crucial protective role for the anti-torsion swivel. First, the upper ring 5 is wrapped around the outside of the first anti-torsion swivel 8. Then, the lower ring 15 is wrapped around the outside of the plastic-coated steel cable 10. Threaded holes are machined at the bottom of the vertical rod 6 and at the corresponding positions of the lower ring 15. At the same time, the connection points of the lower ring 15 and the upper ring 5 with the vertical rod 6 are both at a certain angle. The angled design not only effectively prevents the device from colliding with the ship's side during buoy retrieval operations, facilitating buoy retrieval, but also the upper ring 5 and the lower ring 15 together form a protective barrier for the anti-torsion swivel, preventing fishing nets and other debris from getting entangled in the swivel.

[0037] The support assembly is a crucial support structure for the entire device, comprising multiple vertical rods 6, a fixed mounting plate 7, a rotating mounting plate, a lower rotating mounting plate, and an underwater host computer mounting plate 13. First, aluminum alloy vertical rods 6 are selected, with their top and bottom ends connected to the upper ring 5 and lower ring 15, respectively, to ensure that the vertical rods 6 provide stable support for the entire device. Next, anti-torsion swivel rings are installed at the middle positions of the fixed mounting plate 7, the rotating mounting plate, the lower rotating mounting plate, and the underwater host computer mounting plate 13. During installation, it is ensured that the center of the swivel ring is aligned with the center of the mounting plate. Initial positioning is achieved using locating pins, and then the swivel ring is fixedly connected to the mounting plate using bolts.

[0038] For the underwater host computer mounting plate 13, a slot with a width of 25mm and a depth of 15mm is machined on its side to connect with the vertical rod 6. During installation, the slot is aligned with the corresponding protrusion on the vertical rod 6 and slowly inserted to achieve circumferential positioning and axial limiting. The underwater host computer mounting plate is provided with an installation interface for underwater equipment, which is used to transmit the cable 2 via the coupling cat. The underwater host computer mounting plate 13 is also provided with a standard flange interface for underwater equipment. The size and sealing requirements of the flange interface meet the relevant industry standards, which facilitates the installation of different underwater equipment. A deep groove ball bearing is installed at the connection between the upper rotating mounting plate 11 and the vertical rod 6. The inner ring of the bearing is installed on the vertical rod 6 using a heat-fitting method, and the outer ring of the bearing is connected to the upper rotating mounting plate 11 by bolts, so that the upper rotating mounting plate 11 can rotate flexibly around the vertical rod 6.

[0039] like Figure 4 , Figure 5 As shown, the fixing assembly consists of an upper fixing slider 12, a lower fixing slider 16, and a plastic-coated steel cable mounting bolt 9. It is mainly used to fix the plastic-coated steel cable 10. First, the end of the plastic-coated steel cable is passed through the ferrule. A special crimping tool is used to fix the ferrule to the plastic-coated steel cable. The ferrule 17 is inserted between the two forks of the fork-shaped eye plate below the anti-torsion ring, so that the outer flange of the ferrule fits against the inner side of the fork arm, forming axial positioning. The plastic-coated steel cable mounting bolt is passed laterally through the bolt hole of the fork arm and the through hole in the middle of the ferrule. Flat washers, spring washers, and nuts are installed sequentially at both ends of the bolt, so that the ferrule is clamped in the fork-shaped eye plate 19, achieving rigid fixing of the end of the plastic-coated steel cable. The upper fixing slider 12 is installed to the bottom end of the upper rotating mounting plate 11, and the lower fixing slider 16 is installed to the bottom end of the lower ring 15. The upper fixing slider 12 and the lower fixing slider 16 are then connected. Each of the 16 components has a slot inside, and the outer side of the plastic-coated steel cable 10 is machined with a protrusion that matches the slot. During installation, the slots of the upper fixed slider 12 and the lower fixed slider 16 are aligned with the protrusion of the plastic-coated steel cable, and they are slowly pushed in to achieve circumferential positioning of the upper fixed slider 12 and the plastic-coated steel cable 10. When the buoy rotates, the upper rotating mounting plate is connected to the vertical rod through a deep groove ball bearing and can rotate independently of the fixed components. Since there is a circumferential gap between the inner side of the upper rotating mounting plate and the outer side of the upper fixed slider, the rotation path of the rotating mounting plate is isolated by the fixed slider, and its inner side will not contact the plastic-coated steel cable. The lower fixed slider at the bottom of the lower ring is also designed with a gap to isolate the rotation area of ​​the lower rotating mounting plate from the plastic-coated steel cable, avoiding direct friction between rotating components (such as the mounting plate and the outer ring of the bearing) and the plastic-coated steel cable sheath, thereby protecting the cable insulation layer.

[0040] A 3mm thick anti-slip rubber layer is pasted on the side of the upper fixed slider 12 and the lower fixed slider 16 that are in contact with the plastic-coated steel cable to increase friction and prevent the plastic-coated steel cable 10 from sliding. Finally, an installation hole is set below the anti-torsion swivel of the fixed mounting plate 7, and the plastic-coated steel cable mounting bolt 9 is fixed to the plastic-coated steel cable 10 through the installation hole. Example 2

[0041] The difference between this embodiment and embodiment 1 is that this embodiment provides a working principle of the rotating ring structure of the anti-torsion device for the inductive coupling transmission of marine buoys;

[0042] This application employs multi-dimensional technical design to effectively avoid the jamming problem of the rotating structure of the anti-torsion device for marine buoy inductive coupling transmission in complex marine environments, ensuring the stable operation of the device, as detailed below:

[0043] In the design of the connecting components, a deep groove ball bearing is used to connect the second connecting shackle and the anti-torsion swivel. When the buoy rotates due to external forces such as wind and waves, the buoy drives the first connecting shackle, which then transmits the force to the second connecting shackle via a shackle pin. Due to the presence of the deep groove ball bearing, the rotation of the second connecting shackle allows the anti-torsion swivel to rotate flexibly in its axial direction. This design enables the anti-torsion swivel to respond promptly to the buoy's rotation, preventing it from jamming due to excessive torsional resistance. This ensures that while transmitting tension, the swivel can rotate freely, maintaining the system's stability.

[0044] The upper and lower rings of the protective assembly, together with the vertical rod, form a cage-like structure. This structure not only protects the internal components but also plays a crucial role in preventing jamming. When encountering debris such as fishing nets or seaweed, the cage-like structure acts as a physical barrier, preventing the debris from approaching the anti-torsion swivel and reducing the risk of the swivel getting entangled and jammed. Simultaneously, the 30° angled design at the connection points of the upper and lower rings with the vertical rod changes the direction of the impact force when the buoy is retrieved or comes into contact with other objects. This disperses the debris or impact force along the angled direction, preventing debris from accumulating at the swivel and indirectly ensuring its normal rotation, thus preventing jamming.

[0045] In the support assembly, each mounting plate (fixed mounting plate, rotating mounting plate, under rotating mounting plate, and underwater upper computer mounting plate) is fixedly connected to the vertical rod, and the anti-torsion swivel ring in the middle of the mounting plate allows the components to rotate relative to each other. When the buoy moves, the torsional force on each component is buffered and released by the anti-torsion swivel ring. Taking the upper rotating mounting plate as an example, the deep groove ball bearing at its connection with the vertical rod allows the upper rotating mounting plate to rotate flexibly around the vertical rod under the influence of the buoy. This relative rotation capability between the components effectively avoids the swivel ring from getting stuck due to mutual restraint, ensuring that the entire device can still operate normally in complex motion environments.

[0046] The design of the upper and lower fixed sliders in the fixing components further ensures that the device avoids jamming. The internal groove of the slider engages with the outer protrusion of the plastic-coated steel cable to achieve circumferential positioning of the cable, ensuring its stability within the device and preventing the cable from swaying and interfering with other components. Simultaneously, the anti-slip rubber layer on the side of the slider that contacts the cable effectively buffers external impacts, preventing abnormal movement of the cable from affecting the rotation of the swivel ring, thus preventing the swivel ring from jamming due to issues with the cable.

[0047] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A rotating union structure for protecting a marine buoy from a twist in an inductively coupled transmission, characterized by include: The system includes a connecting component, a protective component, a supporting component, and a fixing component, wherein the lower end of the connecting component is connected to the supporting component, and the protective component is fixedly connected to both the supporting component and the fixing component. The connecting assembly includes a first connecting shackle and a second connecting shackle. The protective assembly consists of an upper ring and a lower ring. The second connecting shackle is installed on the upper end of the upper ring. The supporting assembly includes multiple vertical rods, a fixed mounting plate, a rotating mounting plate, a rotating mounting plate below the plate, and an underwater host computer mounting plate. The top and bottom ends of the vertical rods are respectively connected to the upper ring and the lower ring. The fixing assembly includes an upper fixed slider, a lower fixed slider, and a plastic-coated steel cable mounting bolt.

2. A swivel structure for protecting a marine buoy from a twist caused by an inductively coupled transmission, according to claim 1, wherein The upper end of the first connecting shackle is connected to the mooring eye plate at the root of the buoy by bolts, the lower end of the first connecting shackle is connected to the upper end of the second connecting shackle by a shackle pin, and the lower end of the second connecting shackle is connected to the anti-torsion swivel by a bearing.

3. A swivel structure for protecting a marine buoy from a twist caused by an inductively coupled transmission according to claim 1, wherein The upper ring wraps around the outside of the anti-torsion swivel and connects to the top of the vertical rod of the support assembly. The lower ring wraps around the outside of the plastic-coated steel cable and connects to the bottom of the vertical rod. The connection points of the lower ring and the upper ring with the vertical rod form an oblique angle within a certain range.

4. A swivel structure for protecting a marine buoy from a twist caused by an inductively coupled transmission according to claim 1, wherein Anti-torsion rings are provided in the middle of the fixed mounting plate, the upper rotating mounting plate, the lower rotating mounting plate, and the underwater host computer mounting plate. The fixed mounting plate and the underwater host computer mounting plate are fixedly connected to the vertical rod, and the upper rotating mounting plate and the lower rotating mounting plate are rotatably connected to the vertical rod.

5. A swivel structure for protecting a marine buoy from a twist in an inductively coupled transmission according to claim 4, wherein The underwater host computer mounting plate is connected to the vertical rod of the support component through a slot to achieve circumferential positioning and axial limiting. The underwater host computer mounting plate is provided with an installation interface adapted to underwater equipment.

6. A swivel structure for protecting a marine buoy from a twist in an inductively coupled transmission according to claim 4, wherein A bearing is provided at the connection between the upper rotating mounting plate and the vertical rod. The bearing is a deep groove ball bearing. The inner ring of the bearing is interference-fitted with the vertical rod, and the outer ring of the bearing is connected to the upper rotating mounting plate by bolts.

7. A swivel structure for protecting a marine buoy from a twist in an inductively coupled transmission according to claim 4, wherein The anti-torsion swivel is installed inside the cage-like structure consisting of the vertical rod of the support component and the upper and lower rings of the protective component, and is used to protect the plastic-coated steel cable.

8. The rotating ring structure of the inductive coupling transmission anti-torsion device for protecting marine buoys according to claim 1, characterized in that, The upper fixed slider is installed at the bottom of the upper rotating mounting plate, and the lower fixed slider is installed at the bottom of the lower ring. Both the upper and lower fixed sliders have slots inside, and the plastic-coated steel cable has protrusions on the outside that match the slots. The circumferential positioning of the upper fixed slider and the plastic-coated steel cable is achieved by the protrusions being embedded in the slots.

9. A swivel structure for protecting a marine buoy inductive coupling transmission anti-twist device according to claim 8, characterized in that, Both the upper and lower fixed sliders have an anti-slip rubber layer on the side that is in contact with the plastic-coated steel cable.

10. A swivel structure for protecting a marine buoy inductive coupling transmission anti-twist device according to claim 1, characterized in that, The end of the plastic-coated steel cable is provided with a ferrule. The ferrule at the end of the plastic-coated steel cable is inserted into the fork-shaped eye plate below the anti-torsion ring. The plastic-coated steel cable mounting bolts fix the ferrule in the fork-shaped eye plate laterally.

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