Protecting connection structures

Abstract

The present invention discloses a protective connection structure, comprising a connecting piece, a conductive stud and a nut assembly, wherein the nut assembly comprises a nut body, a torsion spring and a rotating piece, wherein the rotating piece is rotatably arranged on the nut body, wherein the two ends of the torsion spring are respectively connected to the rotating piece and the nut body, wherein the nut body is provided with a threaded hole, wherein the connecting end is screwed into the threaded hole, wherein the rotating piece is provided with an identification area, and wherein the nut body is provided with an observation area, wherein when the nut assembly and the conductive stud are in a loose state, the rotating piece is in a first position, wherein the identification area and the observation area are separated, and when the nut assembly and the conductive stud are in a tightened state, the rotating piece rotates to a second position, wherein the identification area and the observation area coincide with each other. The position of the identification area can be observed in the observation area to intuitively judge whether the nut assembly and the conductive stud are tightened, thereby judging whether the connecting piece is clamped between the limit surface and the nut assembly, without requiring maintenance personnel to individually twist each nut assembly to judge whether the connecting piece is loose.

Description

Technical Field

[0001] The present invention relates to the field of electricity safety, and in particular to a protective connection structure. Background Art

[0002] Substation cabinets, such as protection panels and measurement and control panels, are equipped with numerous protective connectors. These connectors are used to activate or deactivate corresponding protective functions, acting like switches, connecting and disconnecting the protective circuit. For example, if the connector for an instantaneous trip circuit breaker is open, a short circuit on the load side of the switchgear will not trip the switch, but will cause an over-trip, potentially leading to a widespread power outage.

[0003] To ensure the secure connection of protective connectors, operators must regularly inspect them. Due to the large number of protective screens and measurement and control panels within a substation, the number of connectors in use is also high. Furthermore, the nuts on the connectors must be manually tightened to ensure a secure connection. Overall, inspecting protective connectors within a substation is a significant workload. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a protective connection structure that can directly reflect the tightness of the connecting plate nut and reduce the amount of manual work.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A protection connection structure is provided, comprising:

[0007] A connecting piece, wherein the connecting piece is provided with a connecting hole;

[0008] A conductive stud, one end of the conductive stud is a connecting end, a limiting member is provided on the conductive stud, a side of the limiting member facing the connecting end is a limiting surface, the connecting end passes through the connecting hole, and a side surface of the connecting piece is tightly abutted against the limiting surface;

[0009] The nut assembly comprises a nut body, a torsion spring, a rotating member and a driving member, the rotating member is rotatably arranged on the nut body, the two ends of the torsion spring are respectively connected to the rotating member and the nut body, the nut body is provided with a threaded hole, the connecting end is screwed into the threaded hole, the rotating member is provided with an identification area, and the nut body is provided with an observation area. When the nut assembly and the conductive stud are in a loose state, the rotating member is in a first position, and the identification area and the observation area are spaced apart. When the nut assembly and the conductive stud are in a tightened state, the driving member drives the rotating member to rotate to the second position, the identification area coincides with the observation area, and the torsion spring always has a tendency to drive the rotating member to rotate to the first position.

[0010] As a preferred solution for the protective connection structure, the driving member includes a sliding member and an elastic member. The sliding member is connected to the nut body through the elastic member. The elastic member always has a tendency to drive the sliding member to move toward the connecting piece. When the nut assembly and the conductive stud are in a loose state, the sliding member is spaced apart from the rotating member. When the nut assembly and the conductive stud are in a tightened state, the connecting piece presses against the sliding member, the sliding member moves toward the rotating member, and the sliding member presses against the rotating member and drives the rotating member to rotate.

[0011] As a preferred solution for the protective connection structure, a protrusion is provided on the rotating member, a guide surface is provided on the protrusion, and the guide surface is inclined along the circumferential direction of the rotating member. A clamping rod is provided on the sliding member, and when the sliding member moves toward the rotating member, the end of the clamping rod slides along the guide surface, and the rotating member rotates.

[0012] As a preferred solution for the protective connection structure, the sliding member is pressed against a side surface of the connecting piece away from the limiting surface.

[0013] As a preferred solution for protecting the connection structure, the original length of the elastic member is greater than the length of the connection end screwed into the threaded hole.

[0014] As a preferred solution for protecting the connection structure, the sliding part includes a sliding ring, the clamping rod and the sliding ring are integrally formed, a first through hole is provided on the sliding ring, the connecting end passes through the first through hole and is screwed into the threaded hole, the nut body includes a shell, a fixed block and a connecting shaft, the fixed block is fixed in the shell through the connecting shaft, the rotating part is rotatably set on the connecting shaft, the threaded hole is set on the fixed block, and a spacing channel is provided between the peripheral side surface of the fixed block and the inner side surface of the shell, the sliding ring is connected to the fixed block through the elastic part, and the clamping rod passes through the spacing channel and is clamped to the rotating part.

[0015] As a preferred solution for the protective connection structure, two abutting rods are provided, and the two abutting rods are symmetrically distributed on the sliding ring along the center of the first through hole.

[0016] As a preferred solution for protecting the connection structure, a mounting groove is provided on the side of the fixing block facing the connecting piece, the threaded hole is provided at the bottom of the mounting groove, the elastic member is a spring, one end of the elastic member is inserted into the mounting groove, and the elastic member is sleeved on the conductive stud.

[0017] As a preferred solution for protecting the connection structure, the sliding member includes a first gasket, a first through hole is provided on the first gasket, the connecting end passes through the first through hole and is screwed into the threaded hole, the nut body includes a shell, a fixed block and a connecting shaft, the fixed block is fixed in the shell through the connecting shaft, the rotating member is rotatably set on the connecting shaft, the threaded hole is provided on the fixed block, and a mounting hole is provided on the fixed block, the clamping rod is set in the mounting hole, the clamping rod is connected to the fixed block through the elastic member, and the end of the clamping rod away from the rotating member is clamped against the first gasket, and when the nut assembly and the conductive stud are in a loose state, the clamping rod moves toward one side of the connecting piece and squeezes the first gasket, and the first gasket tilts and presses against the connecting piece.

[0018] As a preferred solution for protecting the connection structure, the shell includes an end plate and a surrounding wall arranged on one side of the end plate, the observation area is arranged on the end plate, an observation hole is arranged in the observation area, and the rotating part has a first side facing the end plate, and the identification area is arranged on the first side.

[0019] The beneficial effects of the present invention are as follows: by arranging that when the nut assembly and the conductive stud are in a tightened state, the rotating part rotates to the second position, the identification area coincides with the observation area, and when the nut assembly and the conductive stud are in a loose state, the identification area and the observation area are spaced apart, and the position of the identification area can be observed in the observation area to intuitively judge whether the nut assembly and the conductive stud are tightened, thereby judging whether the connecting piece is clamped between the limit surface and the nut assembly, and there is no need for maintenance personnel to individually twist each nut assembly to judge whether the connecting piece is loose, thereby reducing the amount of manual labor; by arranging a torsion spring, when the nut assembly and the conductive stud are in a loose state, the rotating part can be driven to reset to the first position under the action of the elastic force of the torsion spring, thereby ensuring that the observation area and the identification area are spaced apart in the loose state. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0021] Figure 1 This is a schematic diagram of the protection connection structure described in Example 1 of the present invention.

[0022] Figure 2 Schematic diagram of the insulating base according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the nut assembly described in Example 1 of the present invention.

[0024] Figure 4 Schematic diagram of the housing according to an embodiment of the present invention.

[0025] Figure 5 This is a three-dimensional schematic diagram of the rotating member described in Example 1 of the present invention.

[0026] Figure 6 Schematic diagram of the rotating member according to the first embodiment of the present invention (the side where the observation area is located).

[0027] Figure 7 Schematic diagram of the sliding member according to the first embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the protection connection structure described in Example 2 of the present invention.

[0029] Figure 9 This is a schematic diagram of the nut assembly described in Example 2 of the present invention.

[0030] Figure 10 This is a schematic diagram of the rotating member according to the second embodiment of the present invention (the side where the protrusion is located).

[0031] Figure 11 This is a schematic diagram of the rotating member described in Example 2 of the present invention (the side where the observation area is located).

[0032] Figure 12 This is a schematic diagram of the connecting piece according to an embodiment of the present invention.

[0033] In the picture:

[0034] 1. Conductive stud; 101. Connecting end; 102. Fixed end; 2. Nut assembly; 201. Sliding member; 2011. Clamping rod; 2012. Sliding ring; 2013. First gasket; 202. Elastic member; 203. Rotating member; 2031. Protrusion; 2032. Guide surface; 2033. Identification area; 204. Torsion spring; 205. Fixed block; 2051. Threaded hole; 2052. Mounting groove; 2053. Mounting hole; 206. First through hole; 207. Housing; 2071. End plate; 2072. Surrounding wall; 2073. Observation hole; 208. Connecting shaft; 3. Nut member; 4. Limiting member; 5. Second gasket; 6. Connecting piece; 601. Operating block; 602. Connecting hole; 7. Insulating base; 701. Second through hole. DETAILED DESCRIPTION

[0035] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0037] like Figures 1 to 12 As shown, a protective connection structure provided by the present invention includes a connecting piece 6, a conductive stud 1 and a nut assembly 2, wherein a connecting hole 602 is provided on the connecting piece 6; one end of the conductive stud 1 is a connecting end 101, and a limiting member 4 is provided on the conductive stud 1, and a side of the limiting member 4 facing the connecting end 101 is a limiting surface, the connecting end 101 passes through the connecting hole 602, and a side of the connecting piece 6 is tightly pressed against the limiting surface; the nut assembly 2 includes a nut body, a torsion spring 204, a driving member and a rotating member 203, the rotating member 203 is rotatably arranged on the nut body, and the two ends of the torsion spring 204 are respectively connected to the rotating member 203 It is connected to the nut body, a threaded hole 2051 is provided on the nut body, the connection end 101 is screwed into the threaded hole 2051, an identification area 2033 is provided on the rotating part 203, and an observation area is provided on the nut body. When the nut assembly 2 and the conductive stud 1 are in a loose state, the rotating part 203 is in the first position, and the identification area 2033 and the observation area are separated. When the nut assembly 2 and the conductive stud 1 are in a tightened state, the rotating part 203 rotates to the second position, and the identification area 2033 coincides with the observation area. The torsion spring 204 always has a tendency to drive the rotating part 203 to rotate to the first position. By setting the nut assembly 2 and the conductive stud 1 in a tightened state, the driving member drives the rotating member 203 to rotate to the second position, and the identification area 2033 coincides with the observation area. When the nut assembly 2 and the conductive stud 1 are in a loose state, the identification area 2033 and the observation area are separated. The position of the identification area 2033 can be observed in the observation area to intuitively judge whether the nut assembly 2 and the conductive stud 1 are tightened, thereby judging whether the connecting piece 6 is clamped between the limit surface and the nut assembly 2. There is no need for maintenance personnel to individually twist each nut assembly 2 to judge whether the connecting piece 6 is loose, thereby reducing the amount of manual labor. By setting the torsion spring 204, when the nut assembly 2 and the conductive stud 1 are in a loose state, the rotating member 203 can be driven to reset to the first position under the elastic force of the torsion spring 204, ensuring that the observation area and the identification area 2033 are separated in the loose state.

[0038] Reference Figure 12In this embodiment, the connecting piece 6 has two connection holes 602, one of which is circular, and the other communicates with the side of the connecting piece 6, thereby facilitating the installation and connection between the connecting piece 6 and the two conductive studs 1. An insulating operating block 601 is also provided on the side of the connecting piece 6 away from the stopper 4. The operating block 601 is located in the middle of the connecting piece 6 and between the two connection holes 602.

[0039] Reference Figure 2 The protective connection structure also includes an insulating base 7, which is provided with two second through holes 701. Two conductive studs 1 respectively pass through the two second through holes 701. The end of the conductive stud 1 away from the connecting end 101 is a fixed end 102. A nut part 3 is screwed on the fixed end 102. The nut part 3 and the limiting part 4 jointly clamp the conductive stud 1 on the insulating base 7, wherein two nut parts 3 are provided on the fixed end 102, and a second gasket 5 is clamped between the two nut parts 3. This can prevent the nut part 3 on the fixed end 102 from loosening and shifting. In this embodiment, the limiting part 4 is a nut made of metal, and a second gasket 5 is also clamped between the limiting part 4 and the connecting piece 6. Of course, a second gasket 5 is also provided between the nut body and the connecting piece 6.

[0040] Specifically, the driving member includes a sliding member 201 and an elastic member 202. The sliding member 201 is connected to the nut body via the elastic member 202. The elastic member 202 always has a tendency to drive the sliding member 201 toward the connecting piece 6. When the nut assembly 2 and the conductive stud 1 are in a loose state, the sliding member 201 is spaced apart from the rotating member 203. When the nut assembly 2 and the conductive stud 1 are in a tightened state, the connecting piece 6 abuts against the sliding member 201, and the sliding member 201 moves toward the rotating member 203. The sliding member 201 and the rotating member 203 abut and drive the rotating member 203 to rotate. By providing the sliding member 201 and the elastic member 202, the movement of the sliding member 201 can drive the rotation of the rotating member 203, achieving a change in the position of the identification area 2033, thereby providing maintenance assistance for maintenance personnel.

[0041] Specifically, a protrusion 2031 is provided on the rotating member 203, and an inclined guide surface 2032 is provided on the protrusion 2031. The guide surface 2032 is inclined along the circumferential direction of the rotating member 203. A clamping rod 2011 is provided on the sliding member 201. When the sliding member 201 moves toward the rotating member 203, the end of the clamping rod 2011 slides along the guide surface 2032, and the rotating member 203 rotates. When the nut assembly 2 and the conductive stud 1 are in a loose state, the rotating member 203 is in the first position. At this time, the abutting rod 2011 is directly opposite the high position of the protrusion 2031. When the nut assembly 2 is tightened, the sliding member 201 and the rotating member 203 approach each other, the abutting rod 2011 and the protrusion 2031 are pressed against each other. Due to the inclination of the guide surface 2032 of the protrusion 2031, the rotating member 203 rotates relative to the sliding member 201 under the guidance of the guide surface 2032, so that the low point of the protrusion 2031 is pressed against the abutting rod 2011. At this time, the rotating member 203 rotates to the second position, and the marking area 2033 coincides with the observation area. The guide surface 2032 can be an inclined surface or a curved surface.

[0042] Specifically, in this embodiment, whether in a tightened state or a loosened state, the sliding member 201 is pressed against the connecting piece 6 , thereby ensuring electrical conduction between the connecting piece 6 and the conductive stud 1 .

[0043] Reference Figures 1 to 3 In one embodiment, the original length of the elastic member 202 is greater than the length of the connection end 101 screwed into the threaded hole 2051 when tightened. By setting the original length of the elastic member 202 greater than the length of the connection end 101 screwed into the threaded hole 2051 when tightened, the elastic member 202 is always in a compressed state when the nut body is connected to the conductive stud 1, allowing the sliding member 201 to always press against the connecting piece 6. This ensures that the connecting piece 6 and the limiting member 4 are always in contact, ensuring electrical conduction between the connecting piece 6 and the conductive stud 1. The elastic member 202 can be selected to have a larger elastic coefficient.

[0044] Reference Figure 7Specifically, the sliding member 201 includes a sliding ring 2012, the tightening rod 2011 and the sliding ring 2012 are integrally formed, a first through hole 206 is provided on the sliding ring 2012, the connecting end 101 passes through the first through hole 206 and is screwed into the threaded hole 2051, the nut body includes a shell 207, a fixed block 205 and a connecting shaft 208, the fixed block 205 is fixed in the shell 207 through the connecting shaft 208, the rotating member 203 is rotatably set on the connecting shaft 208, the threaded hole 2051 is set on the fixed block 205, and a spacing channel is provided between the peripheral side surface of the fixed block 205 and the inner side surface of the shell 207, the sliding ring 2012 is connected to the fixed block 205 through the elastic member 202, and the tightening rod 2011 passes through the spacing channel and presses against the rotating member 203. By providing an integrally formed abutting rod 2011 and a sliding ring 2012 , the connection strength between the sliding ring 2012 and the abutting rod 2011 can be improved, thereby ensuring the connection reliability of the nut assembly 2 .

[0045] Specifically, two abutting rods 2011 are provided, symmetrically distributed on the sliding ring 2012 along the center of the first through hole 206. Accordingly, two protrusions 2031 are also provided on the rotating member 203. Providing two abutting rods 2011 increases the number of points at which the sliding member 201 applies force to the rotating member 203, facilitating the rotation of the rotating member 203 and preventing the rotating member 203 from becoming stuck during rotation.

[0046] Reference Figure 3 Specifically, a mounting groove 2052 is provided on the side of the fixing block 205 facing the connecting piece 6, with a threaded hole 2051 located at the bottom of the mounting groove 2052. The elastic member 202 is a spring, one end of which is inserted into the mounting groove 2052, and the elastic member 202 is sleeved onto the conductive stud 1. Providing the mounting groove 2052 on the fixing block 205 facilitates assembly of the elastic member 202 and reduces the size of the nut assembly 2. The conductive stud 1 penetrates the elastic member 202, guiding the expansion and contraction of the elastic member 202 and preventing it from bending during deformation.

[0047] Reference Figure 8 and Figure 9In another embodiment, the sliding member 201 includes a first gasket 2013, the first gasket 2013 is provided with a first through hole 206, the connecting end 101 passes through the first through hole 206 and is screwed into the threaded hole 2051, the nut body includes a housing 207, a fixed block 205 and a connecting shaft 208, the fixed block 205 is fixed in the housing 207 by the connecting shaft 208, the rotating member 203 is rotatably provided on the connecting shaft 208, and the threaded hole 2051 is provided on the fixed block 205. The fixing block 205 is provided with a mounting hole 2053, and a pressing rod 2011 is disposed within the mounting hole 2053. The pressing rod 2011 is connected to the fixing block 205 via the elastic member 202. The end of the pressing rod 2011 away from the rotating member 203 presses against the first washer 2013. When the nut assembly 2 and the conductive stud 1 are in a loose state, the pressing rod 2011 moves toward one side of the connecting piece 6 and presses the first washer 2013, causing the first washer 2013 to tilt and press against the connecting piece 6. Due to the small size of the pressing rod 2011, the contact area between the pressing rod 2011 and the first washer 2013 is small. When the nut assembly 2 and the conductive stud 1 are in a loose state, the pressing rod 2011 presses against the first washer 2013, and the force applied to the first washer 2013 is uneven, causing the first washer 2013 to tilt and press against the connecting piece 6. In this embodiment, the diameter of the first gasket 2013 is larger than the diameter of the second gasket 5. In this embodiment, the mounting hole 2053 is a stepped hole, a limiting protrusion is provided around the abutting rod 2011, and the elastic member 202 is a spring sleeved on the abutting rod 2011. One end of the spring is fixed to the stepped surface in the mounting hole 2053, and the other end is fixed to the limiting protrusion.

[0048] Reference Figure 3 、 Figure 4 and Figure 9 Specifically, the housing 207 includes an end plate 2071 and a surrounding wall 2072 disposed on one side of the end plate. An observation area is disposed on the end plate 2071, and an observation hole 2073 is disposed within the observation area. The rotating member 203 has a first side surface facing the end plate, and an identification area 2033 is disposed on the first side surface. In this embodiment, the identification area 2033 is coated with green paint, and the non-identification area is coated with red paint to indicate a warning. Of course, the identification area 2033 can also be coated with a gradient color, with the color gradually changing along the circumferential direction of the rotating member 203, so as to determine the degree of tightening. When red is observed through the observation hole 2073, it indicates that the nut assembly 2 and the conductive stud 1 are in a loose state. When green is observed through the observation hole 2073, it indicates that the nut assembly 2 and the conductive stud 1 are in a tight state.

[0049] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0050] In this specification, reference to terms such as "one embodiment" or "example" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0051] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0052] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will readily conceive of other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the present invention.

Claims

1. A protective connection structure, characterized in that: include: A connecting piece, wherein the connecting piece is provided with a connecting hole; A conductive stud, one end of the conductive stud is a connecting end, a limiting member is provided on the conductive stud, a side of the limiting member facing the connecting end is a limiting surface, the connecting end passes through the connecting hole, and a side surface of the connecting piece is tightly abutted against the limiting surface; The nut assembly comprises a nut body, a torsion spring, a rotating member and a driving member, the rotating member is rotatably arranged on the nut body, the two ends of the torsion spring are respectively connected to the rotating member and the nut body, the nut body is provided with a threaded hole, the connecting end is screwed into the threaded hole, the rotating member is provided with an identification area, and the nut body is provided with an observation area. When the nut assembly and the conductive stud are in a loose state, the rotating member is in a first position, and the identification area and the observation area are spaced apart. When the nut assembly and the conductive stud are in a tightened state, the driving member drives the rotating member to rotate to the second position, the identification area coincides with the observation area, and the torsion spring always has a tendency to drive the rotating member to rotate to the first position.

2. The protective connection structure according to claim 1, characterized in that: The driving member includes a sliding member and an elastic member, the sliding member is connected to the nut body through the elastic member, and the elastic member always has a tendency to drive the sliding member to move toward the connecting piece. When the nut assembly and the conductive stud are in a loose state, the sliding member is spaced apart from the rotating member. When the nut assembly and the conductive stud are in a tightened state, the connecting piece presses against the sliding member, the sliding member moves toward the rotating member, and the sliding member presses against the rotating member and drives the rotating member to rotate.

3. The protective connection structure according to claim 2, characterized in that: The rotating member is provided with a protrusion, and the protrusion is provided with a guide surface, and the guide surface is inclined along the circumferential direction of the rotating member. The sliding member is provided with a clamping rod, and when the sliding member moves toward the rotating member, the end of the clamping rod slides along the guide surface, and the rotating member rotates.

4. The protective connection structure according to claim 3, characterized in that: The sliding member is pressed against a side surface of the connecting piece away from the limiting surface.

5. The protective connection structure according to claim 4, characterized in that: The original length of the elastic member is greater than the length of the connecting end screwed into the threaded hole.

6. The protective connection structure according to claim 5, characterized in that: The sliding member includes a sliding ring, the clamping rod and the sliding ring are integrally formed, a first through hole is provided on the sliding ring, the connecting end passes through the first through hole and is screwed into the threaded hole, the nut body includes a shell, a fixed block and a connecting shaft, the fixed block is fixed in the shell through the connecting shaft, the rotating member is rotatably arranged on the connecting shaft, the threaded hole is provided on the fixed block, and a spacing channel is provided between the peripheral side surface of the fixed block and the inner side surface of the shell, the sliding ring is connected to the fixed block through the elastic member, and the clamping rod passes through the spacing channel and is clamped to the rotating member.

7. The protective connection structure according to claim 6, characterized in that: Two abutting rods are provided, and the two abutting rods are symmetrically distributed on the sliding ring along the center of the first through hole.

8. The protective connection structure according to claim 6, characterized in that: The fixing block is provided with a mounting groove on one side facing the connecting piece, the threaded hole is provided at the bottom of the mounting groove, the elastic member is a spring, one end of the elastic member is inserted into the mounting groove, and the elastic member is sleeved on the conductive stud.

9. The protective connection structure according to claim 4, characterized in that: The sliding member includes a first gasket, a first through hole is provided on the first gasket, the connecting end passes through the first through hole and is screwed into the threaded hole, the nut body includes a shell, a fixed block and a connecting shaft, the fixed block is fixed in the shell through the connecting shaft, the rotating member is rotatably set on the connecting shaft, the threaded hole is provided on the fixed block, and a mounting hole is provided on the fixed block, the clamping rod is set in the mounting hole, the clamping rod is connected to the fixed block through the elastic member, and the end of the clamping rod away from the rotating member is clamped against the first gasket, when the nut assembly and the conductive stud are in a loose state, the clamping rod moves toward one side of the connecting piece and squeezes the first gasket, and the first gasket tilts and presses against the connecting piece.

10. The protective connection structure according to any one of claims 6 to 9, characterized in that: The shell includes an end plate and a surrounding wall arranged on one side of the end plate, the observation area is arranged on the end plate, an observation hole is arranged in the observation area, the rotating part has a first side facing the end plate, and the identification area is arranged on the first side.

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