Nut retaining assembly

Abstract

This invention discloses a nut retaining assembly, belonging to the field of contactor technology. The nut retaining assembly includes a nut retainer and arc-blocking plates. The nut retainer has multiple fixing slots spaced apart along a first direction, which can hold the nut. The nut retainer can be fixed to the contactor housing, and the fixing slots correspond one-to-one with the contactor's terminal blocks. Multiple arc-blocking plates are provided and can be connected to the nut retainer. The arc-blocking plates can be placed between adjacent terminal blocks of the contactor to isolate the terminal blocks. The nut retaining assembly provided by this invention eliminates the need for additional tools to fix the nut during the assembly and disassembly of the contactor from thermal relays, pre-fabricated wires, or terminals. Tightening or loosening the bolts passing through the terminal blocks is sufficient to achieve the desired connection, making assembly and disassembly convenient and reliable. Furthermore, the arc-blocking plates placed between adjacent terminal blocks of the contactor effectively block arcs of different phases, ensuring electrical safety.

Description

Technical Field

[0001] This invention relates to the field of contactor technology, and more particularly to a nut retaining assembly. Background Technology

[0002] Contactors are used in power, power distribution, and power consumption applications. In a broad sense, a contactor is an electrical device used in industrial electricity that uses the magnetic field generated by current flowing through a coil to close contacts, thereby controlling the load.

[0003] Currently, contactors are generally connected to thermal relays via bolts and nuts, and contactors are also installed with pre-fabricated wires or terminals using bolts and nuts. During connection, due to limited space in the distribution box, it is difficult to manipulate the nuts with wrenches or other tools, making disassembly and assembly very inconvenient. Furthermore, the different phases of arcs generated by the various terminal blocks of the contactor may interact, potentially damaging the contactor and external equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a nut retaining assembly that can fix the nut for easy assembly and disassembly, and can block electric arcs of different phases.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A nut retaining assembly is provided, comprising:

[0007] The nut retainer has multiple fixing slots spaced apart along a first direction. The fixing slots can fix the nut. The nut retainer can be fixed to the housing of the contactor, and the fixing slots can correspond one-to-one with the terminal blocks of the contactor.

[0008] Multiple arc-blocking plates are provided and can be connected to the nut retainer. The arc-blocking plates can be placed between adjacent terminal blocks of the contactor to isolate the terminal blocks.

[0009] Optionally, the nut retainer includes:

[0010] The fixing part is provided at intervals along the first direction, and each fixing part is provided with the fixing groove.

[0011] The connecting part is provided with multiple parts and is respectively disposed between adjacent fixing parts. The connecting part is provided with a first snap-fit ​​part, which can snap-fit ​​with a second snap-fit ​​part on the outer shell. The arc-blocking plate can be connected to the connecting part.

[0012] Optionally, a plurality of strip-shaped protrusions are provided circumferentially at intervals in the fixing groove, and one end of the strip-shaped protrusion facing the opening of the fixing groove is provided with a chamfered surface.

[0013] Optionally, the nut retainer is provided with a plurality of positioning protrusions spaced apart along the first direction. The positioning protrusions and the first snap-fit ​​portion are located on the same side of the nut retainer, and the positioning protrusions can fit against the outer shell.

[0014] Optionally, the connecting part is provided with a receiving groove, and one end of the arc-blocking plate can be inserted into the receiving groove.

[0015] Optionally, the inner side of the receiving groove is provided with a snap-fit ​​protrusion, and the arc-blocking plate is provided with a snap-fit ​​groove that matches and connects with the snap-fit ​​protrusion.

[0016] Optionally, the housing has a stepped surface, and the nut retainer has support members spaced apart along the first direction on the side facing away from the fixing groove. The nut retainer can be placed between the stepped surface and the terminal block, and the end of the support member abuts against the stepped surface, and the end of the fixing groove abuts against the terminal block.

[0017] Optionally, the arc-blocking plate is provided with a third snap-fit ​​portion, which can snap into a fourth snap-fit ​​portion on the outer shell.

[0018] Optionally, the arc-blocking plate includes two opposing limiting plates, which extend along a third direction toward the side of the arc-blocking plate where the third locking portion is provided, and the third locking portion is positioned between the two limiting plates.

[0019] Optionally, a through hole is provided at the center of the bottom of the fixing groove, and a disassembly hole is connected to the periphery of the through hole.

[0020] Optionally, the arc-blocking plate includes a partition and a reinforcing plate, wherein the partition and the reinforcing plate are arranged perpendicularly to make the arc-blocking plate cross-shaped.

[0021] Beneficial effects:

[0022] The nut retaining assembly provided by this invention fixes the nut in a fixing groove and secures the nut retainer to the contactor's housing, ensuring a one-to-one correspondence between the nuts in the fixing groove and the contactor's terminal blocks. During the assembly and disassembly of the contactor from thermal relays, pre-fabricated wires, or terminals, no additional tools are needed to secure the nuts; simply tightening the bolts passing through the terminal blocks achieves the tightening and loosening of the bolts and nuts, making assembly and disassembly convenient and reliable. Furthermore, an arc-blocking plate is placed between adjacent terminal blocks of the contactor to isolate them, effectively blocking arcs of different phases and ensuring electrical safety. Attached Figure Description

[0023] Figure 1 This is an installation diagram of the nut retaining assembly provided in Embodiment 1 of the present invention;

[0024] Figure 2This is a schematic diagram of the nut retainer provided in Embodiment 1 of the present invention from one perspective;

[0025] Figure 3 This is a schematic diagram of the nut retainer provided in Embodiment 1 of the present invention from another perspective;

[0026] Figure 4 This is another perspective structural schematic diagram of the nut retainer provided in Embodiment 1 of the present invention;

[0027] Figure 5 This is a schematic diagram of the arc-blocking plate provided in Embodiment 1 of the present invention from one perspective;

[0028] Figure 6 This is a schematic diagram of the arc-blocking plate provided in Embodiment 1 of the present invention from another perspective;

[0029] Figure 7 This is a schematic diagram of the arc-blocking plate provided in Embodiment 2 of the present invention from one perspective;

[0030] Figure 8 This is a schematic diagram of the arc-blocking plate provided in Embodiment 2 of the present invention from another perspective;

[0031] Figure 9 This is an installation diagram of the nut retaining assembly provided in Embodiment 2 of the present invention.

[0032] In the picture:

[0033] 100. Nut retainer; 110. Fixing part; 111. Fixing groove; 1111. Through hole; 1112. Removal hole; 112. Strip-shaped protrusion; 1121. Chamfered surface; 113. Positioning protrusion; 114. Support; 120. Connecting part; 121. First snap-fit ​​part; 122. Insertion arm; 1221. Receiving groove; 123. Snap-fit ​​protrusion;

[0034] 200, Arc-blocking plate; 210, Partition plate; 211, Snap-fit ​​groove; 220, Reinforcing plate; 230, Rib plate; 240, Third snap-fit ​​part; 241, Connecting block; 242, Extension plate; 2421, First limiting protrusion; 2422, Reserved groove; 250, Limiting plate; 251, Extension part;

[0035] 300. Outer shell; 310. Connecting surface; 311. Second snap-fit ​​part; 312. Fourth snap-fit ​​part; 320. Stepped surface;

[0036] 400, Terminal Block. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0041] Example 1

[0042] Reference Figures 1 to 3 As shown, this embodiment provides a nut retaining assembly, which includes a nut retainer 100 and an arc-blocking plate 200. The nut retainer 100 has multiple fixing slots 111 spaced apart along a first direction. Nuts can be fixed within the fixing slots 111, and the nut retainer 100 can be fixed to the contactor housing 300. Each fixing slot 111 corresponds one-to-one with a terminal block 400 of the contactor. Multiple arc-blocking plates 200 are provided and can be connected to the nut retainer 100. The arc-blocking plates 200 can be placed between adjacent terminal blocks 400 of the contactor to isolate the terminal blocks 400. Figure 1In this context, direction 'a' is the first direction.

[0043] In this embodiment, the nut is fixed in the fixing groove 111 and the nut retainer 100 is fixed to the contactor housing 300 so that the nut in the fixing groove 111 corresponds one-to-one with the terminal block 400 of the contactor. During the disassembly and assembly of the contactor with the thermal relay, pre-fabricated wires or terminals, no additional tools are needed to fix the nut. Only the bolts passing through the terminal block 400 need to be tightened to achieve the tightening and loosening between the bolt and the nut, making disassembly and assembly convenient and reliable. In addition, the arc blocking plate 200 is placed between adjacent terminal blocks 400 of the contactor to isolate the terminal blocks 400, which can effectively block arcs of different phases and ensure electrical safety. Of course, the nut retainer assembly can also be used for the installation of other electrical components, and no further limitations are made here.

[0044] In this embodiment, reference is made to Figures 2 to 4 As shown, the nut retainer 100 includes a fixing part 110 and a connecting part 120. Multiple fixing parts 110 are spaced apart along a first direction, each fixing part 110 having a fixing groove 111. Multiple connecting parts 120 are provided and disposed between adjacent fixing parts 110. Each connecting part 120 has a first snap-fit ​​part 121 that can snap-fit ​​with a second snap-fit ​​part 311 on the outer casing 300. The arc-damping plate 200 can be connected to the connecting part 120. In this embodiment, the nut retainer 100 is composed of fixing parts 110 and connecting parts 120, which facilitates injection molding. Furthermore, the connecting parts 120 are connected to the outer casing 300 via a snap-fit ​​mechanism, which is convenient and quick.

[0045] Preferably, the fixing part 110 is square in shape.

[0046] Preferably, the fixing part 110 is provided in three parts, each corresponding to the three-phase terminal block 400 of the contactor.

[0047] Specifically, multiple strip-shaped protrusions 112 are spaced circumferentially within the fixing groove 111. These protrusions extend along a second direction, and the fixing groove 111 effectively secures the nut via the protrusions 112. Furthermore, the small contact area between the protrusions 112 and the nut reduces sliding friction, facilitating nut installation and removal. Further, one end of each protrusion 112 facing the opening of the fixing groove 111 has a chamfered surface 1121. This chamfered surface guides the nut towards the bottom of the fixing groove 111, further facilitating nut installation and fixation. Figure 1 In this context, direction b is the second direction.

[0048] Specifically, the center of the bottom of the fixing groove 111 is provided with a through hole 1111 to provide clearance space and accommodate bolts of different lengths. Furthermore, the periphery of the through hole 1111 is connected to a disassembly hole 1112, which allows the nut to be pushed out of the fixing groove 111 by tools such as screwdrivers, which is convenient and quick.

[0049] Specifically, continue to refer to Figures 1 to 3 As shown, the housing 300 has a connecting surface 310, and terminal blocks 400 extend from the inside of the contactor through the connecting surface 310 in a third direction. The terminal blocks 400 are spaced apart in a first direction, and second engaging portions 311 are provided on the connecting surface 310 between adjacent terminal blocks 400. Figure 1 In this context, direction c represents the third direction.

[0050] Preferably, the first engaging portion 121 is a slot structure, and the second engaging portion 311 is a snap-fit ​​structure. The first connecting portion 120 includes two engaging arms, with a slot formed between the two engaging portions, extending along a second direction. Specifically, a first hook is provided on the inner side of one of the two engaging arms, and a second hook is provided on the corresponding second engaging portion 311. The first hook and the second hook engage with each other to achieve engagement between the first engaging portion 121 and the second engaging portion 311, thereby positioning the nut retainer 100 relative to the outer casing 300 along the first direction.

[0051] Furthermore, the two snap-fit ​​arms protrude from the connecting portion 120 in the first direction, so that the first snap-fit ​​portion 121 and the second snap-fit ​​portion 311 have a larger contact area, ensuring the stability of the connection between the first snap-fit ​​portion 121 and the second snap-fit ​​portion 311.

[0052] Furthermore, the first latching portion 121 may also have a first latch hook provided on the inner side of both latching arms, and the corresponding second latching portion 311 may also have a second latch hook provided on both opposite sides, in order to increase the stability of the connection between the first latching portion 121 and the second latching portion 311. Of course, the first latching portion 121 and the second latching portion 311 may also have other shapes, which will not be further limited here.

[0053] It is worth mentioning that the thickness of the connecting part 120 is less than that of the fixing part 110, and the toughness of the connecting part 120 is better than that of the fixing part 110. When the first snap-fit ​​part 121 and the second snap-fit ​​part 311 are snapped together, the connecting part 120 and the first snap-fit ​​part 121 are not easy to break.

[0054] In this embodiment, reference continues to be made to... Figures 1 to 3As shown, the nut retainer 100 is provided with a plurality of positioning protrusions 113 spaced apart along a first direction. The positioning protrusions 113 and the first snap-fit ​​portion 121 are located on the same side of the nut retainer 100. The positioning protrusions 113 can fit against the housing 300 to achieve positioning of the nut retainer 100 relative to the housing 300 along a third direction. Specifically, the positioning protrusions 113 fit against the connecting surface 310.

[0055] Specifically, the positioning protrusion 113 is provided on the fixing part 110, and the positioning protrusion 113 and the first snap-fit ​​part 121 are located on the same side of the nut retainer 100. Further, there are two positioning protrusions 113, which are respectively located on the fixing parts 110 at both ends of the nut retainer 100.

[0056] In this embodiment, reference continues to be made to... Figures 1 to 4 As shown, the housing 300 has a stepped surface 320. The nut retainer 100 has support members 114 spaced apart along the first direction on the side facing away from the fixing groove 111. The nut retainer 100 can be placed between the stepped surface 320 and the terminal block 400, and the end of the support member 114 abuts against the stepped surface 320, and the end of the fixing groove 111 abuts against the terminal block 400, so as to realize the positioning of the nut retainer 100 relative to the housing 300 in the second direction, so that the nut retainer 100 is not easy to loosen.

[0057] Specifically, the stepped surface 320 is located below the terminal block 400 along the second direction, and the stepped surface 320 is arranged parallel to the terminal block 400.

[0058] In this embodiment, reference continues to be made to... Figures 1 to 2 As shown, the connecting part 120 is provided with a receiving groove 1221. One end of the arc-blocking plate 200 is inserted into the receiving groove 1221. The nut retainer 100 is connected to the arc-blocking plate 200 by insertion, which ensures reliable positioning and is simple and quick. In addition, to facilitate the insertion of the arc-blocking plate 200 into the receiving groove 1221, the edges of the arc-blocking plate 200 into the receiving groove 1221 and the ends of the receiving groove 1221 are all chamfered.

[0059] In this embodiment, reference is made to Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the arc-blocking plate 200 includes a partition plate 210 and a reinforcing plate 220. The partition plate 210 and the reinforcing plate 220 are arranged vertically to make the arc-blocking plate 200 cross-shaped, giving the arc-blocking plate 200 strong structural stability. Furthermore, according to the shape of the arc-blocking plate 200, the receiving groove 1221 is also cross-shaped.

[0060] Specifically, the receiving groove 1221 and the fixing groove 111 are located on the same side of the nut retainer 100, and the receiving groove 1221 is surrounded by a plurality of plug-in arms 122 extending from the connecting portion 120 in the second direction. Specifically, there are four plug-in arms 122, which are L-shaped and have a certain deformation capability, so that the arc-blocking plate 200 can be inserted into the receiving groove 1221.

[0061] Furthermore, stiffening ribs 230 are provided on opposite sides of the partition 210 to further enhance the structural stability of the arc-blocking plate 200. In addition, the stiffening ribs 230 extend in a third direction. When the arc-blocking plate 200 is inserted into the insertion receiving groove 1221, the stiffening ribs 230 abut against the end of the receiving groove 1221, which has a limiting function and facilitates observation of whether the arc-blocking plate 200 is inserted in place.

[0062] Furthermore, a snap-fit ​​protrusion 123 is provided on the inner side of the receiving groove 1221, and a snap-fit ​​groove 211 is provided on the arc-blocking plate 200 to match and connect with the snap-fit ​​protrusion 123. When the arc-blocking plate 200 is inserted into the receiving groove 1221, the snap-fit ​​protrusion 123 snaps into the snap-fit ​​groove 211, thereby keeping the arc-blocking plate 200 and the nut retainer 100 relatively fixed. In this embodiment, the arc-blocking plate 200 and the nut retainer 100 are assembled first and then installed onto the outer shell 300. When the arc-blocking plate 200 and the nut retainer 100 are installed onto the outer shell, the snap-fit ​​protrusion 123 and the snap-fit ​​groove 211 can effectively prevent the arc-blocking plate 200 and the nut retainer 100 from loosening, ensuring installation efficiency. Of course, the nut retainer 100 can also be installed on the outer shell 300 first, and then the arc-blocking plate 200 can be installed on the outer shell 300.

[0063] Specifically, the partition plate 210 has snap-fit ​​grooves 211 on both sides, and the inner side of the corresponding receiving groove 1221 is also provided with two snap-fit ​​protrusions 123, so that the connection between the arc-blocking plate 200 and the nut retainer 100 is more stable.

[0064] In this embodiment, the arc-blocking plate 200 is provided with a third snap-fit ​​portion 240, which can snap-fit ​​with the fourth snap-fit ​​portion 312 on the outer shell 300 to achieve the positioning and fixing of the arc-blocking plate 200 relative to the outer shell 300.

[0065] Specifically, the third snap-fit ​​portion 240 is disposed on one side edge of the arc-blocking plate 200 along the third direction. The third snap-fit ​​portion 240 includes a connecting block 241 and an extension plate 242. The connecting block 241 is disposed on one side edge of the partition plate 210 along the third direction, and the extension plate 242 is disposed at the end of the connecting block 241 away from the partition plate 210. The extension plate 242 extends toward the snap-fit ​​groove 211 along the second direction. The extended end of the extension plate 242 is provided with a first limiting protrusion 2421, which extends toward the end away from the partition plate 210.

[0066] Furthermore, the fourth locking portion 312 is configured as a second limiting protrusion provided on the connecting surface 310. When the nut retaining assembly is fixed to the housing 300, the first limiting protrusion 2421 is located between the second limiting protrusion and the stepped surface 320. The first limiting protrusion 2421 abuts against the second limiting protrusion to make the nut retaining assembly more secure on the housing 300.

[0067] It is worth mentioning that, to accommodate installation scenarios where the nut retainer 100 is first installed on the housing 300, and then the arc-damping plate 200 is installed on the housing 300, the connecting block 241 protrudes from the partition plate 210, creating a deformation clearance space between the extension plate 242 and the partition plate 210 for the third locking portion 240. Furthermore, the first limiting protrusion 2421 has a chamfered lower edge along the second direction.

[0068] Furthermore, the reinforcing plate 220 is located closer to one side edge of the third snap-fit ​​portion 240 on the arc-blocking plate 200, and the connecting block 241 extends onto the reinforcing plate 220.

[0069] Furthermore, a reserved groove 2422 is provided on the extension plate 242, which extends along the second direction to the first limiting protrusion 2421, which is conducive to the injection molding at the third snap-fit ​​part 240.

[0070] Example 2

[0071] The arc-damping plate 200 in the nut retaining assembly provided in this embodiment differs from that in Embodiment 1. In this embodiment, refer to... Figures 7 to 9 As shown, the arc-blocking plate 200 includes not only the partition plate 210 and the reinforcing plate 220, but also two opposing limiting plates 250. The limiting plates 250 extend along a third direction toward the side of the arc-blocking plate 200 where the third engaging portion 240 is located, and the third engaging portion 240 is positioned between the two limiting plates 250. In this embodiment, the limiting plates 250 increase the protective level of the arc-blocking plate 200, more effectively blocking arcs of different phases and ensuring electrical safety.

[0072] Specifically, the third card connector 240 does not have a reserved slot 2422.

[0073] Specifically, one end of the limiting plate 250 is connected to the reinforcing plate 220, and the other end of the limiting plate 250 can fit against the connecting surface 310 of the outer shell 300, thereby making the arc blocking plate 200 more effective in blocking electric arcs of different phases and ensuring electrical safety.

[0074] Specifically, the first limiting protrusion 2421 extends outward at both ends along the first direction to increase the length of the first limiting protrusion 2421, and the second limiting portion on the housing 300 also extends outward at both ends along the first direction, thereby increasing the contact area between the first limiting protrusion 2421 and the second limiting protrusion and improving the fixing stability of the nut retaining assembly relative to the housing 300.

[0075] Furthermore, the limiting plate 250 is provided with an extension portion 251 extending along the second direction towards the edge of the insertion groove 1221 of the arc-blocking plate 200. When the arc-blocking plate 200 is inserted into the insertion groove 1221, the two extension portions 251 clamp the corresponding insertion arms 122, effectively preventing the arc-blocking plate 200 from shaking relative to the nut retainer 100.

[0076] The other structures of the nut retaining assembly provided in this embodiment are the same as those in Embodiment 1, and will not be described in detail here.

[0077] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A nut retention assembly characterized by, The utility model relates to a nut holder (100) is provided with a plurality of fixed slots (111) along the first direction interval, nut can be fixed in the fixed slot (111), the nut holder (100) can be fixed on the shell (300) of contactor, and the fixed slot (111) can correspond with the wiring panel (400) of contactor one by one, the nut holder (100) includes fixed part (110) and connecting part (120), the fixed part (110) is provided with a plurality of intervals along the first direction, and the fixed slot (111) is arranged respectively on each fixed part (110), the connecting part (120) is arranged between the adjacent fixed part (110) respectively, and the first clamping part (121) is arranged on the connecting part (120), and the first clamping part (121) can be clamped with the second clamping part (311) on the shell (300). Arc separation board (200) is provided with a plurality of and can be connected with the nut holder (100), and the arc separation board (200) can be placed between the adjacent wiring panel (400) of contactor respectively to isolate the wiring panel (400), and the arc separation board (200) is provided with the third clamping part (240), the third clamping part (240) can be clamped with the fourth clamping part (312) on the shell (300), and the arc separation board (200) can be connected with the connecting part (120). The fixed slot (111) is provided with a plurality of strip-shaped protrusions (112) along the circumference interval, and the strip-shaped protrusion (112) is provided with a chamfer surface (1121) towards the opening end of the fixed slot (111).

2. The nut retention assembly of claim 1, wherein, The nut holder (100) is provided with a plurality of positioning protrusions (113) along the first direction interval, the positioning protrusion (113) is located on the same side of the nut holder (100) with the first clamping part (121), and the positioning protrusion (113) can be attached with the shell (300).

3. The nut retention assembly of claim 1, wherein, The connecting part (120) is provided with a containing groove (1221), and one end of the arc separation board (200) can be inserted into the containing groove (1221).

4. The nut retention assembly of claim 1, wherein, The inner side of the containing groove (1221) is provided with a clamping protrusion (123), and the arc separation board (200) is provided with a clamping groove (211) matched with the clamping protrusion (123).

5. The nut retention assembly of claim 4, wherein, The shell (300) has a stepped surface (320), and the side of the nut holder (100) away from the fixed slot (111) is provided with a support (114) along the first direction interval, the nut holder (100) can be placed between the stepped surface (320) and the wiring panel (400), and the end of the support (114) abuts against the stepped surface (320), and the end of the fixed slot (111) abuts against the wiring panel (400).

6. The nut retention assembly of claim 1, wherein, ​ 7. The nut retention assembly of claim 1, wherein, The arc separation plate (200) comprises two opposite limiting plates (250), the limiting plates (250) extend to the side of the arc separation plate (200) along the third direction and the third clamping part (240) is arranged between the two limiting plates (250).

8. The nut retention assembly of claim 1, wherein, A through hole (1111) is arranged at the center of the groove bottom of the fixing groove (111), and a dismounting hole (1112) is in communication with the periphery of the through hole (1111).

9. The nut retention assembly of any one of claims 1 to 8, wherein, The arc separation plate (200) comprises a separation plate (210) and a reinforcing plate (220), and the separation plate (210) and the reinforcing plate (220) are arranged vertically to make the arc separation plate (200) in a cross shape.

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