Movable plug and electrical connector

Abstract

The utility model belongs to electrical equipment technical field discloses dynamic plug and electrical connector, and dynamic plug includes: the first casing includes the plug end and the installation end who set up oppositely, and there is first installation cavity in the first casing, and the plug end is equipped with first mounting hole, and the installation end is equipped with second mounting hole, and the second mounting hole bore area is greater than first mounting hole bore area, and the contact subassembly is worn in first mounting hole through second mounting hole and is constrained, and the main contact is located outside the first casing, and the electricity connection subassembly includes fixed casing and first electricity connection piece, and the first electricity connection end of first electricity connection piece is equipped with first fastener, and first electricity connection piece can detachably connect fixed casing, and fixed casing is detachably arranged in the first casing through second mounting hole, and the first connecting end is connected to the auxiliary contact of contact subassembly, and the first electricity connection end is located outside the first casing. Through above setting, can improve assembly efficiency, reduce production cost, do not influence contact subassembly when dismounting fixed casing, improve electrical connector maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to moving plugs and electrical connection devices. Background Technology

[0002] A drawer-type low-voltage switchgear is a complete set of switchgear that installs low-voltage electrical appliances in a removable functional unit. The drawer-type functional unit realizes the electrical connection or disconnection between the moving plug and the static socket on the cabinet through the pulling and pushing action.

[0003] Existing technology provides a moving plug, including a plug housing, a contact assembly for electrically connecting to a stationary socket, a plug copper busbar, and a contact fixing shell. The plug housing has a large mounting hole at one end and a small hole at the other end for the plug copper busbar to pass through. During assembly, the contact assembly, plug copper busbar, and contact fixing shell are first assembled together. Then, the assembly is installed inside the plug housing through the mounting hole. A fixing pin connects the contact fixing shell and the plug housing, thus fixing the positions of the contact assembly and plug copper busbar. The small hole serves to maintain the stability of the plug copper busbar. Due to its small diameter, the plug copper busbar needs to be installed inside the plug housing before the screw for connecting the wire is installed on the end of the plug copper busbar exposed by the small hole. Because moving plugs are difficult to clamp and position, it is difficult to automatically tighten the screws. Manual assembly is inefficient and increases production costs. Furthermore, when inspecting the inside of the contact fixing shell, the contact assembly, plug copper busbar, and contact fixing shell need to be completely removed from the plug housing, which is cumbersome and inefficient. Utility Model Content

[0004] One objective of this invention is to provide a movable plug that solves the problems of low efficiency, increased production costs, cumbersome maintenance procedures, and low disassembly and assembly efficiency when installing the screws on the copper busbars of the plug manually.

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

[0006] A movable plug is provided, including a contact assembly for inserting into a stationary socket, the movable plug further comprising:

[0007] A first housing includes a plug-in end and a mounting end disposed opposite to each other. The first housing has a first mounting cavity. The plug-in end has a first mounting hole, and the mounting end has a second mounting hole. The opening area of ​​the second mounting hole is larger than the opening area of ​​the first mounting hole. The contact assembly is configured to pass through the second mounting hole and be constrained within the first mounting hole. The main contact of the contact assembly is located outside the first housing.

[0008] A power-connecting assembly includes a fixed housing and a first power-connecting member. A first power-connecting end of the first power-connecting member is provided with a first fastener. The first power-connecting member is detachably connected to the fixed housing. The fixed housing is configured to be detachably disposed within the first housing via a second mounting hole. A first connecting end of the first power-connecting member is connected to an auxiliary contact of the contact assembly. The first power-connecting end is located outside the first housing.

[0009] In one embodiment, the fixed housing has an insertion hole, through which the auxiliary contact can be inserted into the fixed housing and connected to the first connection end.

[0010] In one embodiment, the contact assembly includes a positioning frame and two side-by-side contact pieces, each of the contact pieces having an auxiliary contact. Both contact pieces are detachably connected to the positioning frame, which is configured to constrain the two contact pieces to maintain a fixed distance between the two auxiliary contacts. A first connecting end is clamped between the two auxiliary contacts.

[0011] The fixed housing has two insertion holes, and the two auxiliary contacts correspond one-to-one with the two insertion holes.

[0012] In one embodiment, the fixed housing has a heat dissipation channel, and the fixed housing also has a heat dissipation hole. The heat dissipation hole is connected to the second mounting hole. One end of the heat dissipation channel is connected to the insertion hole, and the other end is connected to the heat dissipation hole. A blocking block is provided in the heat dissipation channel.

[0013] In one embodiment, one of the fixed housing and the first housing has a first assembly hole, and the other has a mounting member that can be inserted into the first assembly hole.

[0014] In one embodiment, the first assembly hole is formed in the first housing, the mounting member is disposed in the fixed housing, and the mounting member protrudes from the outer side wall of the fixed housing; and / or,

[0015] The mounting component has a first guide slope on the side facing the first mounting hole; and / or,

[0016] The mounting component has a second guide slope on the side facing the second mounting hole.

[0017] In one embodiment, the cross-sectional shape of the fixed housing is adapted to the second mounting hole. The fixed housing includes a first fixed housing and a second fixed housing that are interlocked with each other. The first fixed housing and the second fixed housing are respectively sandwiched on both sides of the first electrical contact. Both the first fixed housing and the second fixed housing are provided with the mounting component. The first housing has two first assembly holes, and the two first assembly holes correspond one-to-one with the two mounting components.

[0018] Another objective of this invention is to provide an electrical connection device having a movable plug.

[0019] To achieve this objective, the present invention employs the following technical solution in another aspect:

[0020] An electrical connection device is provided, including a movable plug as in any of the above embodiments, the electrical connection device further including a stationary socket, the stationary socket including a second contact element, the contact assembly being connected to the second contact element.

[0021] In one embodiment, the static socket further includes:

[0022] The second housing includes an isolation portion having a second mounting cavity and a communicating hole communicating with the second mounting cavity. The second housing also has a third mounting hole communicating with the second mounting cavity.

[0023] The second electrical connector has a second fastener at its second electrical terminal. The second electrical connector is inserted into the third mounting hole and detachably connected to the second housing. The second electrical connector has a second connection end located in the second mounting cavity and is connected to the main contact.

[0024] In one embodiment, the second housing has a second assembly hole, the second electrical connector has an insertion groove corresponding to the second assembly hole, and the static socket further includes a fixing block that is engaged with the insertion groove through the second assembly hole.

[0025] The beneficial effects of this utility model are:

[0026] The movable plug provided by this utility model has a larger opening area for the second mounting hole at the mounting end than that of the first mounting hole at the plug-in end. This allows for the first assembly of the contact assembly via the second mounting hole, while the first mounting hole constrains one end of the contact assembly, preventing it from detaching from the first housing at the plug-in end. The method of installation from the second mounting hole into the first housing does not constrain the first fastener on the first electrical connector. The first fastener and the first electrical connector can be assembled using an automated assembly process before being installed on the fixed housing, improving assembly efficiency and reducing production costs. The electrical connector is installed after the contact assembly. The first connecting end of the first electrical connector connects to the auxiliary contact of the contact assembly, thus constraining the other end of the contact assembly and completely fixing it in place. Furthermore, when maintenance is required inside the fixed housing, only the fixed housing and the first electrical connector need to be disassembled; the contact assembly remains inside the first housing and does not need to be disassembled with the fixed housing, simplifying the process and improving disassembly and assembly efficiency.

[0027] The electrical connector device provided by this utility model includes the aforementioned movable plug. It can be assembled with the first fastener and the first electrical connector using an automated assembly process before being installed in the fixed housing, improving the assembly efficiency of the electrical connector device and reducing production costs. Furthermore, when maintenance is required inside the fixed housing, only the fixed housing and the first electrical connector need to be disassembled and reassembled; the contact assembly remains inside the first housing and does not need to be disassembled along with the fixed housing, simplifying the process and improving the maintenance efficiency of the electrical connector device. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the movable plug provided in an embodiment of the present invention;

[0029] Figure 2 This is an assembly diagram of the movable plug provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the first housing provided in an embodiment of the present utility model;

[0031] Figure 4 This is a structural disassembly diagram of the power connection component provided in this embodiment of the utility model;

[0032] Figure 5 This is a cross-sectional view of the movable plug provided in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the insertion of the electrical connector provided in this embodiment of the utility model;

[0034] Figure 7 This is an assembly diagram of the static socket provided in this embodiment of the utility model;

[0035] Figure 8This is a schematic diagram of the structure of the second housing provided in an embodiment of the present invention.

[0036] In the picture:

[0037] 1. Contact assembly; 11. Main contact; 12. Auxiliary contact; 13. Contact piece; 14. Positioning frame; 2. First housing; 21. Insertion end; 22. Mounting end; 23. First mounting cavity; 24. First mounting hole; 25. Second mounting hole; 26. First assembly hole; 3. Power connection assembly; 31. Fixed housing; 311. Insertion hole; 312. Heat dissipation channel; 313. Heat dissipation hole; 314. Blocking block; 315. Mounting component; 3151. First guide slope; 3152. Second guide slope; 3161. First fixed housing; 3162. Second fixed housing; 32. First power connection component; 321. First power connection end; 322. First connection end; 33. First fastener;

[0038] 100. Static socket; 101. Second electrical connector; 1011. Second electrical terminal; 1012. Second connection terminal; 1013. Insertion groove; 102. Second housing; 1021. Isolation part; 1022. Second mounting cavity; 1023. Connecting hole; 1024. Third mounting hole; 1025. Second assembly hole; 1026. Auxiliary heat dissipation hole; 103. Second fastener; 104. Fixing block. Detailed Implementation

[0039] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] like Figures 1 to 3 As shown, this embodiment first provides a moving plug, which includes a contact assembly 1 for inserting into and connecting to a stationary socket 100. This embodiment is described using the example of providing circuit connection for three-phase electrical equipment. The moving plug is a three-pole moving plug, which is provided with three sets of contact assemblies 1.

[0044] The plug also includes a first housing 2 and a power connection assembly 3. The first housing 2 includes a plug-in end 21 and a mounting end 22 disposed opposite to each other. The first housing 2 has a first mounting cavity 23. The plug-in end 21 has a first mounting hole 24. The mounting end 22 has a second mounting hole 25. The opening area of ​​the second mounting hole 25 is larger than the opening area of ​​the first mounting hole 24. The contact assembly 1 is configured to pass through the second mounting hole 25 and be constrained within the first mounting hole 24. The main contact 11 of the contact assembly 1 is located outside the first housing 2 to facilitate contact with the static socket 100 and achieve electrical connection. The power connection assembly 3 includes a fixed housing 31 and a first power connection member 32. The first power connection member 32 has a first fastener 33 at its first power connection end 321. The first power connection member 32 is detachably connected to the fixed housing 31. The fixed housing 31 is configured to be detachably disposed inside the first housing 2 through the second mounting hole 25. The first connection end 322 of the first power connection member 32 is connected to the auxiliary contact 12 of the contact assembly 1. The first power connection end 321 is located outside the first housing 2.

[0045] In this embodiment, the opening area of ​​the second mounting hole 25 on the mounting end 22 is larger than the opening area of ​​the first mounting hole 24 on the plug end 21. The contact assembly 1 can be assembled first through the second mounting hole 25. The first mounting hole 24 constrains one end of the contact assembly 1, preventing it from detaching from the plug end 21 and the first housing 2. The method of installation from the second mounting hole 25 into the first housing 2 does not constrain the first fastener 33 on the first contactor 32. The first fastener 33 and the first contactor 32 can be assembled using an automated assembly process before being installed on the fixed housing 31, improving assembly efficiency and reducing production costs. The contact assembly 3 is installed after the contact assembly 1. The first connecting end 322 of the first contactor 32 is connected to the auxiliary contact 12 of the contact assembly 1, thereby constraining the other end of the contact assembly 1, thus completely fixing the contact assembly 1. Moreover, when maintenance is required inside the fixed housing 31, only the fixed housing 31 and the first electrical connector 32 need to be disassembled and reassembled. The contact assembly 1 remains inside the first housing 2 and does not need to be disassembled and reassembled with the fixed housing 31, simplifying the steps and improving disassembly and assembly efficiency.

[0046] In one embodiment, the first electrical connector 32 is a copper busbar, and the first fastener 33 is a wiring bolt. During the automated assembly process of the first fastener 33, the first electrical connector 32 can be fixed by a clamp, and the first fastener 33 can be tightened using an electric screwdriver. Figure 2 The middle arrow indicates the assembly direction of the moving plug. The power connection component 3 is assembled as one piece, and then the contact component 1 and the power connection component 3 are assembled onto the first housing 2 in sequence.

[0047] To constrain and fix the auxiliary contact 12, the fixed housing 31 has an insertion hole 311. The auxiliary contact 12 can be inserted into the fixed housing 31 through the insertion hole 311 and connected to the first connecting end 322. When the fixed housing 31 is installed in the first housing 2, the auxiliary contact 12 is inserted into the insertion hole 311 and connected to the first connecting end 322.

[0048] In one embodiment, the contact assembly 1 includes a positioning frame 14 and two parallel contact pieces 13, each contact piece 13 having an auxiliary contact 12. Both contact pieces 13 are detachably connected to the positioning frame 14. The positioning frame 14 is configured to constrain the two contact pieces 13 to maintain a fixed distance between the two auxiliary contacts 12. The fixing housing 31 has two insertion holes 311, with each auxiliary contact 12 corresponding to one insertion hole 311. The positioning frame 14 is provided with an intermediate separator to maintain the positional stability of the contact pieces 13 while maintaining a fixed distance between the two auxiliary contacts 12. Thus, when the auxiliary contacts 12 are inserted into the insertion holes 311, the first connecting end 322 can be easily clamped between the two auxiliary contacts 12. Preferably, the fixed distance between the two auxiliary contacts 12 is slightly smaller than the thickness of the first contacting member 32, which ensures the reliability of the electrical connection.

[0049] To improve the heat dissipation effect of contact assembly 1 during operation, such as Figure 5 As shown, the fixed housing 31 has a heat dissipation channel 312 inside, and the fixed housing 31 also has a heat dissipation hole 313. The heat dissipation hole 313 is connected to the second mounting hole 25. One end of the heat dissipation channel 312 is connected to the insertion hole 311, and the other end is connected to the heat dissipation hole 313. A blocking block 314 is provided inside the heat dissipation channel 312. When the moving plug and the stationary socket 100 are inserted and connected, the heat generated during the operation of the contact assembly 1 can be dissipated through the heat dissipation channel 312 from the mounting end 22 of the first housing 2. The stationary socket 100 will not form a blockage, resulting in better heat dissipation, which is beneficial for cooling the moving plug and improving the current carrying capacity of the moving plug.

[0050] Preferably, the blocking block 314 and the heat dissipation channel 312 are arranged at an angle to form a labyrinthine heat dissipation path. Figure 5 The dashed arrow in the middle indicates the heat dissipation path, which reduces the risk of impurities, moisture, etc. entering the inside of the moving plug through the heat dissipation channel 312 without affecting the heat dissipation effect, and improves the IP protection level of the moving plug.

[0051] Regarding the detachable connection structure between the fixed housing 31 and the first housing 2, in one embodiment, one of the fixed housing 31 and the first housing 2 has a first assembly hole 26, and the other has a mounting member 315, which can be inserted into the first assembly hole 26. The fixed housing 31 and the first housing 2 are injection-molded plastic structural parts, which are non-conductive and have a certain degree of elasticity. The detachable connection between the fixed housing 31 and the first housing 2 is achieved by the snap-fit ​​between the mounting member 315 and the first assembly hole 26. The structure is simple, the connection is reliable, and it can be repeatedly disassembled and assembled, making it convenient to use.

[0052] For example, a first assembly hole 26 is formed in the first housing 2, and a mounting member 315 is disposed in the fixed housing 31, protruding from the outer side wall of the fixed housing 31. When the fixed housing 31 is pushed toward the first housing 2, the mounting member 315 is directly engaged in the first assembly hole 26, indicating that the power connection assembly 3 is installed in place.

[0053] For ease of installation, such as Figure 4 As shown, the mounting component 315 has a first guide slope 3151 on the side facing the first mounting hole 24. Guided by the first guide slope 3151, the mounting component 315 can be smoothly engaged into the first assembly hole 26.

[0054] In one embodiment, such as Figure 4 As shown, the mounting component 315 has a second guide slope 3152 on the side facing the second mounting hole 25. When it is necessary to disassemble the fixed housing 31, the fixed housing 31 moves in the opposite direction to the first housing 2. Guided by the second guide slope 3152, the mounting component 315 can be easily disassembled from the first assembly hole 26.

[0055] The cross-sectional shape of the fixed housing 31 is adapted to the second mounting hole 25. The fixed housing 31 includes a first fixed housing 3161 and a second fixed housing 3162 that are interlocked. The first fixed housing 3161 and the second fixed housing 3162 are respectively sandwiched on both sides of the first electrical connector 32. The fixed housing 31 has a pin that passes through the through hole on the first electrical connector 32 to limit and constrain the first electrical connector 32. Both the first fixed housing 3161 and the second fixed housing 3162 are provided with mounting parts 315. The first housing 2 has two first assembly holes 26, and the two first assembly holes 26 correspond one-to-one with the two mounting parts 315. Since the cross-sectional shape of the fixed housing 31 is adapted to the second mounting hole 25, after the first fixed housing 3161, the second fixed housing 3162 and the first electrical connector 32 are aligned and assembled, no other fixing parts are needed, and the electrical connector 3 can be constrained and positioned in the second mounting hole 25.

[0056] The present invention further provides an electrical connection device, such as... Figures 6 to 8As shown, the electrical connector includes a movable plug as described in any of the above embodiments. The electrical connector also includes a stationary socket 100, which includes a second contact element 101. The contact assembly 1 is connected to the second contact element 101. The opening area of ​​the second mounting hole 25 at the mounting end 22 of the movable plug is larger than the opening area of ​​the first mounting hole 24 at the plug-in end 21. The contact assembly 1 can be assembled first through the second mounting hole 25. The first mounting hole 24 constrains one end of the contact assembly 1, preventing it from detaching from the plug-in end 21 and the first housing 2. The method of installation from the second mounting hole 25 into the first housing 2 does not constrain the first fastener 33 on the first contact element 32. The first fastener 33 and the first contact element 32 can be assembled using an automated assembly process before being installed on the fixed housing 31, improving the assembly efficiency of the electrical connector and reducing production costs. The energizing assembly 3 is installed after the contact assembly 1. The first connecting end 322 of the first energizing element 32 is connected to the auxiliary contact 12 of the contact assembly 1, thereby constraining the other end of the contact assembly 1 and completely fixing the contact assembly 1. Moreover, when maintenance is required inside the fixed housing 31, only the fixed housing 31 and the first energizing element 32 need to be disassembled and assembled. The contact assembly 1 remains inside the first housing 2 and does not need to be disassembled and assembled with the fixed housing 31, simplifying the process and improving the maintenance efficiency of electrical connection equipment.

[0057] In one embodiment, the static socket 100 further includes a second housing 102, which includes an isolation portion 1021, such as... Figure 8 As shown, the isolation part 1021 has a second mounting cavity 1022, and the isolation part 1021 has a connecting hole 1023 communicating with the second mounting cavity 1022. The second housing 102 has a third mounting hole 1024 communicating with the second mounting cavity 1022. The second power-connecting end 1011 of the second power-connecting component 101 is provided with a second fastener 103. The second power-connecting component 101 is inserted into the third mounting hole 1024 and detachably connected to the second housing 102. The second connecting end 1012 of the second power-connecting component 101 is located in the second mounting cavity 1022 and is connected to the main contact 11. By forming an integral connection structure between the isolation part 1021 and the second housing 102, the number of parts is reduced and the assembly process is simplified. Moreover, the assembly process of the second electrical connector 101 will not constrain the second fastener 103. The second fastener 103 and the second electrical connector 101 can be assembled by an automated assembly process and then installed on the second housing 102, avoiding problems such as low production efficiency and high production cost caused by manual tightening.

[0058] The second electrical connector 101 is a copper busbar, and the second fastener 103 is a wiring bolt. During the automated assembly of the second fastener 103, the second electrical connector 101 can be fixed using a clamp, and the second fastener 103 can be tightened using an electric screwdriver. Taking the circuit connection for three-phase electrical equipment as an example, the static socket 100 is a three-pole static socket, equipped with three sets of second electrical connectors 101, each corresponding to one of the three sets of contact assemblies 1. For example... Figure 7 As shown in the figure, the arrows indicate the assembly direction of the second electrical connector 101 with the second fastener 103 and the fixing block 104 in the static socket 100.

[0059] In one embodiment, for the installation of the second electrical connector 101, the second housing 102 has a second assembly hole 1025, and the second electrical connector 101 has a insertion groove 1013 corresponding to the second assembly hole 1025. The static socket 100 also includes a fixing block 104, which is engaged with the insertion groove 1013 via the second assembly hole 1025. This snap-fit ​​method allows for the detachable installation of the second electrical connector 101 on the second housing 102, resulting in a simple structure, reliable connection, and the ability to be repeatedly disassembled and reassembled, making it convenient to use.

[0060] Optionally, to better dissipate heat from the static socket 100, multiple auxiliary heat dissipation holes 1026 are provided on the top and sides of the second housing 102, which helps to improve the current carrying capacity of the static socket 100. This embodiment does not limit the specific location and number of the auxiliary heat dissipation holes 1026.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A movable plug, comprising a contact assembly (1) for inserting into a static socket (100), characterized in that, The movable plug also includes: A first housing (2) includes a plug-in end (21) and a mounting end (22) disposed opposite to each other. The first housing (2) has a first mounting cavity (23). The plug-in end (21) has a first mounting hole (24). The mounting end (22) has a second mounting hole (25). The opening area of ​​the second mounting hole (25) is larger than the opening area of ​​the first mounting hole (24). The contact assembly (1) is configured to pass through the second mounting hole (25) and be constrained within the first mounting hole (24). The main contact (11) of the contact assembly (1) is located outside the first housing (2). The power connection assembly (3) includes a fixed housing (31) and a first power connection member (32). The first power connection member (32) has a first fastener (33) at its first power connection end (321). The first power connection member (32) is detachably connected to the fixed housing (31). The fixed housing (31) is configured to be detachably disposed in the first housing (2) through the second mounting hole (25). The first connection end (322) of the first power connection member (32) is connected to the auxiliary contact (12) of the contact assembly (1). The first power connection end (321) is located outside the first housing (2).

2. The movable plug according to claim 1, characterized in that, The fixed housing (31) has an insertion hole (311), and the auxiliary contact (12) can be inserted into the fixed housing (31) through the insertion hole (311) and connected to the first connection end (322).

3. The movable plug according to claim 2, characterized in that, The contact assembly (1) includes a positioning frame (14) and two contact pieces (13) arranged side by side. Each contact piece (13) has an auxiliary contact (12). Both contact pieces (13) are detachably connected to the positioning frame (14). The positioning frame (14) is configured to constrain the two contact pieces (13) so that a fixed distance is maintained between the two auxiliary contacts (12). The first connecting end (322) is sandwiched between the two auxiliary contacts (12). The fixed housing (31) has two insertion holes (311), and the two auxiliary contacts (12) correspond one-to-one with the two insertion holes (311).

4. The movable plug according to claim 2, characterized in that, The fixed housing (31) has a heat dissipation channel (312) inside, and the fixed housing (31) also has a heat dissipation hole (313). The heat dissipation hole (313) is connected to the second mounting hole (25). One end of the heat dissipation channel (312) is connected to the insertion hole (311), and the other end is connected to the heat dissipation hole (313). A blocking block (314) is provided inside the heat dissipation channel (312).

5. The movable plug according to claim 1, characterized in that, One of the fixed housing (31) and the first housing (2) is provided with a first assembly hole (26), and the other is provided with a mounting part (315), which can be inserted into the first assembly hole (26).

6. The movable plug according to claim 5, characterized in that, The first assembly hole (26) is formed in the first housing (2), the mounting member (315) is disposed in the fixed housing (31), and the mounting member (315) protrudes from the outer side wall of the fixed housing (31); and / or, The mounting component (315) has a first guide slope (3151) on the side facing the first mounting hole (24); and / or, The mounting component (315) has a second guide slope (3152) on the side facing the second mounting hole (25).

7. The movable plug according to claim 5, characterized in that, The cross-sectional shape of the fixed housing (31) is adapted to the second mounting hole (25). The fixed housing (31) includes a first fixed housing (3161) and a second fixed housing (3162) that are fastened together. The first fixed housing (3161) and the second fixed housing (3162) are respectively sandwiched on both sides of the first electrical contact (32). The first fixed housing (3161) and the second fixed housing (3162) are both provided with the mounting component (315). The first housing (2) has two first assembly holes (26). The two first assembly holes (26) and the two mounting components (315) correspond one-to-one.

8. An electrical connector, characterized in that, Including the movable plug as described in any one of claims 1-7, the electrical connection device further includes a stationary socket (100), the stationary socket (100) including a second contact element (101), and the contact assembly (1) connected to the second contact element (101).

9. The electrical connection device according to claim 8, characterized in that, The static socket (100) also includes: The second housing (102) includes an isolation portion (1021), the isolation portion (1021) having a second mounting cavity (1022), the isolation portion (1021) having a connecting hole (1023) communicating with the second mounting cavity (1022), and the second housing (102) having a third mounting hole (1024) communicating with the second mounting cavity (1022); The second power-connecting terminal (1011) of the second power-connecting component (101) is provided with a second fastener (103). The second power-connecting component (101) is inserted into the third mounting hole (1024) and detachably connected to the second housing (102). The second connecting terminal (1012) of the second power-connecting component (101) is located in the second mounting cavity (1022) and is connected to the main contact (11).

10. The electrical connection device according to claim 9, characterized in that, The second housing (102) has a second assembly hole (1025), and the second electrical connector (101) has an insertion groove (1013) corresponding to the second assembly hole (1025). The static socket (100) also includes a fixing block (104), which is engaged in the insertion groove (1013) through the second assembly hole (1025).

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