Coupler with interface protection structure

Abstract

The application relates to a coupler with an interface protection structure, comprising a coupler main body, an interface structure installed at the end of the coupler main body, and at least two protection components arranged on the inner wall of the interface structure; the protection component comprises a protection base, a protection block installed on the protection base, the side wall of the protection block is elastic, the protection block is hollow inside, and an elastic element is arranged in the protection block. When a cable is plugged into the coupler through the interface structure, the protection block of the application is pressed by the cable and is recessed inward, so that the elastic element is bent, the restoring force of the elastic element and the restoring force of the recessed part of the side wall of the protection block jointly act on the cable, so that the cable is clamped, and the stability of the connection between the cable and the coupler is improved.

Description

Technical Field

[0001] This application relates to the field of coupler technology, and in particular to a coupler with an interface protection structure. Background Technology

[0002] Currently, carrier communication technology that uses high-voltage transmission lines to transmit high-frequency carrier signals is being used more and more widely. Inductive couplers are important coupling devices used in high-voltage transmission line carrier communication systems. They can be installed in the potential-free shielding layer or grounded busbar circuit of the power cable, transmitting or receiving power line carrier signals through a high-frequency cable. This achieves impedance matching between the transmission channel and the power line carrier equipment, isolation between the high-voltage equipment and the power line carrier equipment, and provides very low insertion attenuation for the transmission of power line carrier signals.

[0003] However, if the connection between the inductive coupler and the cable becomes loose, it may cause signal transmission interruption or instability, which may not only affect the continuity of communication, but also interfere with systems that rely on these signals to operate. Utility Model Content

[0004] Therefore, it is necessary to provide a coupler with an interface protection structure to address the problem of signal transmission interruption or instability caused by loose connection between the inductive coupler and the cable, so as to improve the stability of the connection between the cable and the coupler.

[0005] According to one aspect of this application, a coupler with an interface protection structure is provided, comprising: a coupler body, an interface structure installed at the end of the coupler body, and at least two protection components provided on the inner wall of the interface structure;

[0006] The protective component includes: a protective base, and a protective block mounted on the protective base; the protective block is hollow inside and is provided with an elastic element, and the side walls of the protective block are all elastic. When the protective block is subjected to external force, the protective block collapses and the elastic element deforms.

[0007] In one embodiment, the protective base includes:

[0008] Support;

[0009] A reset mechanism is provided, with one end connected to the support base and the other end used to support the protective block. The reset mechanism is configured such that when the protective block is subjected to an external force, the reset mechanism deforms, causing the distance between the protective block and the support base to decrease, and at the same time generating a force to drive the protective block away from the support base.

[0010] In one embodiment, the support seat is provided with a sliding groove;

[0011] The reset mechanism includes a receiving section and a reset assembly; wherein...

[0012] The receiving section includes a rigidly connected rotating arm and a support arm, the support arm being used to support the protective block; the rotating arm is axially connected to the bearing seat, and the angle between the rotating arm and the bearing seat can be adjusted under the action of the protective block or the reset assembly, so as to adjust the distance between the protective block and the bearing seat;

[0013] The first end of the reset component is mounted on the side of the support arm away from the protective block, and the second end of the reset component is located in the sliding groove and can move in the sliding groove under the action of the protective block. When the distance between the protective block and the bearing seat decreases, the reset component is used to provide a force to the protective block away from the bearing seat.

[0014] In one embodiment, the support seat is provided with a sliding groove; the reset mechanism includes a receiving block and a reset component. The receiving block is used to support the protective block. The receiving block is installed at the first end of the reset component. The second end of the reset component is located in the sliding groove and can move in the sliding groove under the action of the protective block to change the distance between the protective block and the support seat. When the distance between the protective block and the support seat decreases, the reset component is used to provide a force to the protective block away from the support seat.

[0015] In one embodiment, the first end of the sliding groove has a limiting hole, the inner diameter of which is smaller than the inner diameter of the sliding groove.

[0016] The reset assembly includes a sliding rod, and a slider body and an elastic component located in the sliding groove;

[0017] Wherein, the inner diameter of the slider body is larger than the inner diameter of the limiting hole; the elastic component is installed between the slider body and the second end of the sliding groove; the first end of the sliding rod passes through the limiting hole and is connected to the slider body, and the second end of the sliding rod is connected to the support arm or the receiving block.

[0018] In one embodiment, the at least two protective components are evenly distributed circumferentially along the inner wall of the interface structure.

[0019] In one embodiment, the plurality of elastic supports are symmetrically distributed about the center of the protective block.

[0020] In one embodiment, the protective block is semi-cylindrical, and the axial direction of the protective block is consistent with the axial direction of the interface structure; the elastic support is an arc-shaped cross-section rod, and the length of the elastic support is consistent with the length of the protective block.

[0021] In one embodiment, the sidewalls of the protective block are made of rubber, and the elastic element is made of rubber.

[0022] In one embodiment, the outer side wall of the coupler body is provided with a plurality of mounting slots, and the end of the interface structure is provided with a mounting plate with the same number of mounting slots, and the size of the mounting plate matches the size of the mounting slot, so that the mounting plate can be inserted into and fixed in the mounting slot.

[0023] In one embodiment, the sidewall of the interface structure has an opening along its axial direction, and through holes are symmetrically arranged at both ends of the opening. Fasteners are arranged in the through holes. By adjusting the fasteners, the opening can be driven to contract or expand to strengthen the fixation or disassembly of the interface structure.

[0024] In one embodiment, the interface structure has a first section and a second section along its own axial direction, the inner diameter of the first section is smaller than the inner diameter of the second section, and the inner diameter of the second section matches the outer diameter of the coupler body; the sidewall of the interface structure has an opening along its own axial direction, the opening extending at least to cover the second section; through holes are symmetrically arranged at both ends of the opening, and fasteners are disposed in the through holes.

[0025] The aforementioned coupler with an interface protection structure, when the cable is inserted into the interface structure, causes the protective block of the protection component to indent inward due to the cable's pressure. This causes the elastic element inside the protective block to bend. The restoring force of the elastic element and the restoring force of the indented portion of the protective block's sidewall together act on the cable, clamping it securely and improving the stability of the cable-coupler connection. This prevents signal transmission interruptions or instability caused by a loose connection. Furthermore, when the cable is plugged into the interface structure, the cable's sidewall only contacts the sidewall of the protective block. The elastic deformation of the protective block effectively suppresses surface wear caused during cable insertion, achieving the purpose of cable protection.

[0026] In addition, when the cable is inserted into the interface structure, the cable indirectly applies pressure to the reset mechanism through the protection block, causing the reset mechanism to deform and thus change the distance between the protection block and the carrier. At this time, the reset mechanism generates a reset force to drive the protection block away from the carrier and closer to the cable, thereby achieving further clamping of the cable. Attached Figure Description

[0027] Figure 1This is a schematic diagram of the overall structure of the coupler with interface protection structure provided in this embodiment.

[0028] Figure 2 This embodiment provides a schematic diagram of the split structure of the coupler with interface protection.

[0029] Figure 3 This is a schematic diagram of the side structure of the coupler with interface protection structure provided in this embodiment.

[0030] Figure 4 This is a schematic diagram of the structure of the protection component provided in this embodiment.

[0031] Figure 5 This is a cross-sectional structural diagram of the protective block provided in this embodiment.

[0032] Figure 6 This is a cross-sectional structural diagram of the protective base provided in this embodiment.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Coupler body; 20. Interface structure; 30. Protection component; 11. Mounting slot; 21. Mounting plate; 22. Opening; 23. Through hole; 24. Fastener; 31. Protective base; 32. Protective block; 321. Side wall of the protective block; 322. Elastic support; 311. Bearing seat; 312. Receiving section; 313. Reset component; 3111. Sliding groove; 3121. Rotating arm; 3122. Support arm; 3112. Limiting hole; 3131. Sliding rod; 3132. Slider body; 3133. Elastic component. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] As described in the background section, when the connection between the inductive coupler and the cable becomes loose, it may cause signal transmission interruption or instability, which may not only affect the continuity of communication, but also interfere with systems that rely on these signals to operate.

[0042] To address this, this application provides a coupler with an interface protection structure, which improves the stability of the cable-inductive coupler connection, overcoming the series of effects caused by the aforementioned unstable cable-inductive coupler connection. It is worth noting that this application is not only applicable to inductive couplers, but also to other coupling devices requiring interface mating, such as capacitive couplers and radio frequency couplers.

[0043] like Figure 1-2 As shown, a coupler with an interface protection structure provided in one embodiment of this application includes: a coupler body 10 and an interface structure 20 installed at the end of the coupler body 10. The interface structure 20 can be fixedly installed on the coupler body 10 by a fixed connection or detachably installed on the coupler body 10. To improve the applicability of the interface structure 20, enabling one interface structure 20 to be adapted to multiple couplers and reducing costs, in the embodiment provided in this application, the interface structure 20 is detachably installed at the end of the coupler body 10.

[0044] Specifically, such as Figure 2 As shown, multiple mounting slots 11 are arranged circumferentially along the outer side wall of the coupler body 10. The end of the interface structure 20 is provided with mounting plates 21 in the same number as the mounting slots 11. The size of the mounting plates 21 matches the size of the mounting slots 11 so that the mounting plates 21 can be inserted and fixed in the mounting slots 11, thereby fixing the interface structure 20 on the coupler body 10.

[0045] Furthermore, the sidewall of the interface structure 20 has an opening 22 along its axial direction, making the interface structure 20 a deformable C-shaped structure. Through holes 23 are symmetrically arranged at both ends of the opening 22, and fasteners 24 are disposed within the through holes 23. By adjusting the fasteners 24, the opening 22 can be driven to contract or expand, thereby strengthening the fixation or disassembly of the interface structure 20. Specifically, when the mounting plate 21 of the interface structure 20 is inserted into the mounting groove 11 of the coupler body 10, adjusting the fasteners 24 causes the opening 22 to contract, thereby enhancing the clamping force between the interface structure 20 and the coupler body 10 and improving the connection stability; when disassembling the interface structure 20, the fasteners 24 are adjusted in the opposite direction to expand the opening 22, thereby disassembling or replacing the interface structure 20. Preferably, the fasteners 24 include, but are not limited to, bolts, screws, and pins.

[0046] In other embodiments of this application, the interface structure 20 has a first segment and a second segment along its axial direction. The inner diameter of the first segment is smaller than the inner diameter of the second segment, and the inner diameter of the second segment matches the outer diameter of the coupler body 10, forming a transition fit or clearance fit. By fitting the second segment of the interface structure 20 onto the coupler body 10, a detachable connection between the interface structure 20 and the coupler body 10 can be achieved. Further, the sidewall of the interface structure 20 has an opening 22 along its axial direction, and the opening 22 at least extends to cover the second segment of the interface structure 20. Through holes 23 are symmetrically arranged at both ends of the opening 22, and fasteners 24 are disposed within the through holes 23. By adjusting the fasteners 24, the opening 22 can be driven to contract or expand, thereby strengthening the fixation or allowing the interface structure 20 to be removed.

[0047] like Figure 3 As shown, two protective components 30 are provided on the inner wall of the interface structure 20, and the two protective components 30 are symmetrically distributed about the center of the interface structure 20. In other embodiments of this application, three protective components 30 are provided on the inner wall of the interface structure 20, and the three protective components 30 are evenly distributed circumferentially along the inner wall of the interface structure 20. The tops of the multiple protective components 30 together form a cable insertion space, the inner diameter of which is slightly smaller than the outer diameter of the cable, so that the cable can be inserted into the interface structure 20 while compressing each protective component 30.

[0048] like Figures 4-5As shown, the protection component 30 includes a protection base 31 and a protection block 32 mounted on the protection base 31. The sidewall 321 of the protection block has a certain thickness and is elastic; the protection block 32 is hollow inside, and an elastic element is provided inside the protection block 32. The elastic element includes a plurality of elastic support members 322 extending radially along the protection block 32, and these elastic support members 322 are symmetrically distributed about the center of the protection block 32. Preferably, the sidewall 321 of the protection block 32 is made of rubber, and the elastic support members 322 are made of rubber. When the cable is inserted into the interface structure 20, the protection block 32 is squeezed by the cable and indented inward, causing the elastic support members 322 inside the protection block 32 to bend. The restoring force of the elastic support members 322 and the restoring force of the indented part of the sidewall 321 of the protection block together react on the cable, thereby clamping the cable and improving the stability of the connection between the cable and the coupler, so as to avoid signal transmission interruption or instability caused by loose connection between the cable and the coupler. In addition, when the cable is plugged into the interface structure 20, the sidewall of the cable only contacts the sidewall 321 of the protective block 32. The elastic deformation of the protective block 32 can effectively suppress the wear of the outer sheath caused during the cable plugging process, thereby achieving the purpose of cable protection.

[0049] Preferably, in order to increase the contact area between the outer wall of the cable and the protective block 32 and further improve the stability of the connection between the cable and the coupler, in one embodiment of this application, the protective block 32 is semi-cylindrical, the axial direction of the protective block 32 is consistent with the axial direction of the interface structure 20, the elastic support 322 is an arc-shaped cross-section rod, and the length of the elastic support 322 is consistent with the length of the protective block 32.

[0050] The protective base 31 includes a support base 311 and a reset mechanism. One end of the reset mechanism is connected to the support base 311, and the other end of the reset mechanism is used to support the protective block 32. When the cable is inserted into the interface structure 20, the sidewall of the cable squeezes the protective component 30, the protective block 32 collapses under force, and the squeezing force of the cable is transmitted to the reset mechanism. The deformation of the reset mechanism reduces the distance between the protective block 32 and the support base 311. At the same time, the reset mechanism generates a reset force to drive the protective block 32 away from the support base 311 and closer to the cable, thereby further clamping the cable.

[0051] Specifically, such as Figure 4 , Figure 6As shown, the bearing seat 311 has a sliding groove 3111 inside, and the reset mechanism includes a receiving section 312 and a reset assembly 313. The receiving section 312 includes a rigidly connected rotating arm 3121 and a support arm 3122. The support arm 3122 is parallel to the reference plane of the bearing seat 311 and is used to support the protective block 32. The rotating arm 3121 is axially connected to the bearing seat 311 and forms an acute angle with the reference plane of the bearing seat 311. The rotating arm 3121 can adjust the angle between itself and the bearing seat 311 under the action of the protective block 32 or the reset assembly 313, so as to adjust the distance between the protective block 32 and the bearing seat 311. The first end of the reset assembly 313 is mounted on the side of the support arm 3122 away from the protective block 32, and the second end of the reset assembly 313 is located in the sliding groove 3111. The reset assembly 313 can move in the sliding groove 3111 under the action of the protective block 32. When the distance between the protective block 32 and the bearing seat 311 is shortened, the reset assembly 313 is used to provide the protective block 32 with a force to keep it away from the bearing seat 311.

[0052] When the protective block 32 is squeezed by the cable, on the one hand, the protective block 32 itself collapses, and on the other hand, the protective block 32 transmits the force of the cable to the support arm 3122 and the reset assembly 313, thereby driving the rotating arm 3121 to rotate relative to the bearing seat 311 to reduce the distance between the protective block 32 and the bearing seat 311. At the same time, it drives the second end of the reset assembly 313 to move in the sliding groove 3111. At this time, the reset assembly 313 generates a reset force to push the rotating arm 3121 to rotate in the opposite direction, and at the same time pushes the protective block 32 away from the bearing seat 311, thereby further clamping the cable.

[0053] In other embodiments of this application, the reset mechanism includes a receiving block and a reset assembly 313. The receiving block is mounted on the first end of the reset assembly 313, and the second end of the reset assembly 313 is located within a sliding groove 3111. The receiving block supports the protective block 32, and the reset assembly can move within the sliding groove 3111 under the action of the protective block 32. The movement of the reset assembly within the sliding groove 3111 changes the distance between the protective block 32 and the support seat 311, and the deformation of the reset assembly generates a reset force. Therefore, when the distance between the protective block 32 and the support seat 311 decreases, the reset assembly provides a force to the protective block 32 that moves away from the support seat 311.

[0054] Furthermore, the first end of the sliding groove 3111 has a limiting hole 3112, the inner diameter of which is smaller than the inner diameter of the sliding groove 3111. The reset assembly 313 includes a sliding rod 3131, a slider body 3132 located in the sliding groove 3111, and an elastic component 3133. The slider body 3132 is movable within the sliding groove 3111, and its outer diameter is larger than the inner diameter of the limiting hole 3112 to prevent it from falling out of the sliding groove 3111. The elastic component is installed between the slider body 3132 and the second end of the sliding groove 3111. The first end of the sliding rod 3131 passes through the limiting hole 3112 and connects to the slider body 3132, while the second end of the sliding rod 3131 connects to the support arm 3122. When the protective block 32 is compressed by the cable, the sliding rod 3131 drives the slider body 3132 to move within the sliding groove 3111, causing the elastic component 3133 to compress. At this time, the elastic component generates a restoring force, pushing the sliding rod 3131 to move in the opposite direction, thereby pushing the protective block 32 away from the bearing seat 311, achieving further clamping of the cable. Preferably, the elastic component 3133 includes, but is not limited to, a spring, a bellows, and an elastic ring.

[0055] In the aforementioned coupler with an interface protection structure, when a cable is inserted into the interface structure 20, the protective block 32 of the protection component 30 is compressed by the cable and indents inward. This causes the elastic support 322 inside the protective block 32 to bend. The restoring force of the elastic support 322 and the restoring force of the recessed portion of the side wall 321 of the protective block 32 work together to clamp the cable, improving the stability of the connection between the cable and the coupler and preventing signal transmission interruption or instability caused by a loose connection. Furthermore, when the cable is plugged into the interface structure 20, the side wall of the cable only contacts the side wall 321 of the protective block 32. The elastic deformation of the protective block 32 effectively suppresses sheath wear caused during cable insertion, achieving the purpose of cable protection.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A coupler with an interface protection structure, characterized in that, include: A coupler body, an interface structure installed at the end of the coupler body, and at least two protective components provided on the inner wall of the interface structure; The protective component includes: a protective base, and a protective block mounted on the protective base; the protective block is hollow inside and has an elastic element, and the sidewall of the protective block is elastic. When the protective block is subjected to an external force, the protective block collapses and the elastic element deforms.

2. The coupler with an interface protection structure according to claim 1, characterized in that, The protective base includes: Support; A reset mechanism is provided, with one end connected to the support base and the other end used to support the protective block. The reset mechanism is configured such that when the protective block is subjected to an external force, the reset mechanism deforms, reducing the distance between the protective block and the support base, and simultaneously generating a reset force to drive the protective block away from the support base.

3. The coupler with interface protection structure according to claim 2, characterized in that, The bearing seat is provided with a sliding groove; the reset mechanism includes a receiving section and a reset component. The receiving section includes a rigidly connected rotating arm and a support arm, the support arm being used to support the protective block; the rotating arm is axially connected to the bearing seat, and the angle between the rotating arm and the bearing seat can be adjusted under the action of the protective block or the reset assembly, so as to adjust the distance between the protective block and the bearing seat; The first end of the reset component is mounted on the side of the support arm away from the protective block, and the second end of the reset component is located in the sliding groove and can move in the sliding groove under the action of the protective block. When the distance between the protective block and the bearing seat decreases, the reset component is used to provide a force to the protective block away from the bearing seat.

4. The coupler with interface protection structure according to claim 3, characterized in that, The bearing seat is provided with a sliding groove; The reset mechanism includes a receiving block and a reset component. The receiving block supports the protective block and is installed at a first end of the reset component. The second end of the reset component is located in the sliding groove. The reset component can move within the sliding groove under the action of the protective block to change the distance between the protective block and the support seat. When the distance between the protective block and the support seat decreases, the reset component provides a force to the protective block that moves away from the support seat.

5. The coupler with an interface protection structure according to claim 3 or 4, characterized in that, The first end of the sliding groove has a limiting hole, and the inner diameter of the limiting hole is smaller than the inner diameter of the sliding groove. The reset assembly includes a sliding rod, and a slider body and an elastic component located in the sliding groove; Wherein, the inner diameter of the slider body is larger than the inner diameter of the limiting hole; the elastic component is installed between the slider body and the second end of the sliding groove; the first end of the sliding rod passes through the limiting hole and is connected to the slider body, and the second end of the sliding rod is connected to the support arm or the receiving block.

6. The coupler with an interface protection structure according to claim 1, characterized in that, The at least two protective components are evenly distributed circumferentially along the inner wall of the interface structure.

7. The coupler with an interface protection structure according to claim 1, characterized in that, The sidewalls of the protective block are made of rubber, and the elastic element is made of rubber.

8. The coupler with an interface protection structure according to claim 1, characterized in that, The outer side wall of the coupler body is provided with multiple mounting slots, and the end of the interface structure is provided with a mounting plate with the same number of mounting slots. The size of the mounting plate matches the size of the mounting slot, so that the mounting plate can be inserted into and fixed in the mounting slot.

9. The coupler with an interface protection structure according to claim 8, characterized in that, The sidewall of the interface structure has an opening along its own axial direction, and through holes are symmetrically arranged at both ends of the opening. Fasteners are arranged in the through holes. By adjusting the fasteners, the opening can be driven to contract or expand to strengthen the fixation or disassembly of the interface structure.

10. The coupler with an interface protection structure according to claim 1, characterized in that, The interface structure has a first section and a second section along its own axial direction. The inner diameter of the first section is smaller than the inner diameter of the second section, and the inner diameter of the second section matches the outer diameter of the coupler body. The sidewall of the interface structure has an opening along its own axial direction, and the opening extends to at least cover the second section. Through holes are symmetrically arranged at both ends of the opening, and fasteners are arranged in the through holes.

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