A megawatt-class MCS rail transit charging connector

Abstract

This invention discloses a megawatt-level MCS rail transit charging connector, belonging to the technical field of charging connectors. It includes a plug end and a socket end. The plug end includes a plug housing, a floating plate mounted on the front end of the plug housing, and a power terminal assembly penetrating the floating plate. A limiting ring is installed on the inner side of the plug housing, sliding axially within a plug hole formed on the end face of the plug housing. An annular limiting groove is formed on the inner side of the limiting ring to limit the floating plate. Multiple radial elastic supports are evenly distributed circumferentially between the floating plate and the limiting ring. A limiting plate is also installed on the inner side of the plug housing, spaced axially from the limiting ring. This invention avoids the problem of uneven radial contact pressure on the power terminals inside the connector during mating due to settlement of the rail vehicle suspension system after passenger loading, track unevenness, or parking positioning errors, thus extending the lifespan of the device.

Description

Technical Field

[0001] This invention belongs to the field of charging connector technology, specifically relating to a megawatt-level MCS rail transit charging connector. Background Technology

[0002] In megawatt-level rail transit charging connectors, due to the extremely high charging power, even minute angular deviations during the docking process between the charging gun and the vehicle socket—such as those caused by the settlement of the rail vehicle's suspension system after passenger loading, track unevenness, or parking positioning errors—can lead to uneven radial contact pressure on the power terminals inside the connector during mating. This uneven contact, under megawatt-level current, can cause a sudden increase in local contact resistance, resulting in millisecond-level instantaneous arcing flashover at the contact interface. Over long-term use, the accumulation of these minute misalignments can cause localized burns and plating peeling on the terminal surface, thereby accelerating contact fatigue failure. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a megawatt-level MCS rail transit charging connector that can solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a megawatt-level MCS rail transit charging connector, comprising a plug end and a socket end. The plug end includes a plug housing, a floating plate mounted on the front end of the plug housing, and a power terminal assembly penetrating the floating plate. A limiting ring is installed on the inner side of the plug housing, and the limiting ring is slidably mounted in a plug hole formed on the end face of the plug housing along the axial direction. An annular limiting groove for limiting the floating plate is formed on the inner side of the limiting ring. Multiple radial elastic support members are evenly distributed circumferentially between the floating plate and the limiting ring. A limiting plate is also installed on the inner side of the plug housing, and the limiting plate and the limiting ring are axially spaced. An axial elastic support member is provided between the limiting plate and the limiting ring. The socket end includes a socket housing and mating terminals embedded in the socket housing, and the mating terminals correspond to the power terminal assembly.

[0005] Furthermore, the floating plate has through holes. The power terminal assembly includes a base, a support column, a helical spring, a deflection cap, and a terminal piece. The base is fixed to the inner side of the floating plate, and the support column is fixed on the base. The deflection cap has a hollow cylindrical structure. The support column is connected to the deflection cap through the helical spring. The deflection cap covers the outside of the support column and the helical spring. The deflection cap passes through the through hole and is connected to the terminal piece. The terminal piece is installed on the outer end of the deflection cap.

[0006] Furthermore, the terminal component includes multiple terminal bodies evenly spaced along the circumference of the deflection cap. The terminal bodies have an arc-shaped elongated block structure, and the multiple terminal bodies are combined to form a cylindrical contact interface that mates with the mating terminal.

[0007] Furthermore, a spiral cooling pipe is sleeved on the outside of the terminal piece, and both ends of the cooling pipe are connected to the cooling device through connecting pipes.

[0008] Furthermore, a support pipe is also installed on the floating plate, and a vortex plate is installed on the outside of the support pipe. The vortex plate is made of elastic material. The support pipe is connected to the inner end of the vortex plate, one of the connecting pipes is connected to the outer end of the vortex plate, and the other connecting pipe is fixedly installed on the floating plate.

[0009] Furthermore, the support tube includes an outer tube, a central column is slidably inserted into the inner side of the outer tube, a pressure plate is fixed to the outer end of the central column, and a friction plate is fixedly installed on the inner side of the pressure plate; a pressure column is installed on the inner side of the socket housing, and the pressure column corresponds to the pressure plate when the plug end and the socket end are engaged.

[0010] Furthermore, the axial elastic support includes a rubber pad, which is fixed inside the plug housing and installed between the limiting plate and the limiting ring. Both sides of the rubber pad are fixedly connected to the end faces of the limiting plate and the limiting ring, respectively.

[0011] The beneficial effects of this invention are as follows: This invention discloses a megawatt-level MCS rail transit charging connector. By designing a floating plate that can float radially and axially, the mating terminals at the socket end and the power terminal assembly at the plug end have a certain floating space when they mate. This avoids the problem of uneven radial contact pressure on the power terminals inside the connector during mating caused by the settlement of the rail vehicle suspension system after passenger loading, track unevenness, or parking positioning errors, thus extending the life of the device. Attached Figure Description

[0012] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the plug end structure; Figure 2 This is a schematic diagram showing the fit between the support column and the deflection cap; Figure 3 This is a schematic diagram of the deflection cap. Figure 4 This is a schematic diagram showing the arrangement of the radial elastic support members; Figure 5 This is a structural diagram of the socket end; Figure 6 This is a schematic diagram of the axial elastic support component. Figure 7 This is a schematic diagram showing the fit between the outer tube and the central column.

[0013] The following are the markings in the attached diagram: Plug end 1, Socket end 2, Plug housing 3, Floating plate 4, Power terminal assembly 5, Limiting ring 6, Plug hole 7, Annular limiting groove 8, Radial elastic support 9, Limiting plate 10, Axial elastic support 11, Socket housing 12, Connecting terminal 13, Through hole 14, Base 15, Support column 16, Helical spring 17, Deflection cap 18, Terminal piece 19, Terminal body 20, Cooling pipe 21, Outer pipe 22, Scroll plate 23, Center column 24, Pressure plate 25, Friction plate 26, Pressure column 27. Detailed Implementation

[0014] like Figures 1-7 As shown, the present invention discloses a megawatt-level MCS rail transit charging connector, including a plug end 1 and a socket end 2. The plug end 1 includes a plug housing 3, a floating plate 4 installed at the front end of the plug housing 3, and a power terminal assembly 5 passing through the floating plate 4. With the length direction of the plug hole 7 of the plug housing 3 as the axial direction, the floating plate 4 is perpendicular to this direction. When the power terminal assembly 5 is engaged with the mating terminal 13 of the socket end 2, a charging connection is realized.

[0015] In this invention, a limiting ring 6 is installed on the inner side of the plug housing 3. The limiting ring 6 is slidably installed in the plug hole 7 formed on the end face of the plug housing 3 along the axial direction. An annular limiting groove 8 is formed on the inner side of the limiting ring 6 to limit the floating plate 4. The floating plate 4 can only move in the annular limiting groove 8, and the direction of movement is along the radial direction of the plug hole 7.

[0016] To provide elastic support and restoring force, multiple radial elastic support members 9 are evenly distributed circumferentially between the floating plate 4 and the limiting ring 6. The radial elastic support members 9 are springs. A limiting plate 10 is also installed on the inner side of the plug housing 3. The limiting plate 10 and the limiting ring 6 are axially spaced. An axial elastic support member 11 is provided between the limiting plate 10 and the limiting ring 6. The socket end 2 includes a socket housing 12 and a mating terminal 13 embedded in the socket housing 12. The mating terminal 13 corresponds to the power terminal assembly 5. Thus, the power terminal assembly 5 and the floating plate 4 of the present invention can move radially and axially. After charging is completed, they can return to their original positions within the range of movement, ensuring both accurate docking and the lifespan of the device.

[0017] In this embodiment, the floating plate 4 has a through hole 14. The power terminal assembly 5 includes a base 15, a support column 16, a coil spring 17, a deflection cap 18, and a terminal piece 19. The base 15 is fixed to the inner side of the floating plate 4, and the support column 16 is fixed on the base 15. The deflection cap 18 has a hollow cylindrical structure. The support column 16 is connected to the deflection cap 18 through the coil spring 17. The deflection cap 18 covers the outside of the support column 16 and the coil spring 17. The deflection cap 18 passes through the through hole 14 and is connected to the terminal piece 19. The terminal piece 19 is installed at the outer end of the deflection cap 18. The deflection cap 18 and the terminal piece 19 can deflect relative to the base 15, so that each power terminal assembly 5 has a certain floating variation space and has a better adaptability.

[0018] In this embodiment, the terminal component 19 includes a plurality of terminal bodies 20 evenly spaced along the circumference of the deflection cap 18. The terminal bodies 20 have an arc-shaped elongated block structure, and the plurality of terminal bodies 20 are combined to form a cylindrical contact interface that mates with the mating terminal 13.

[0019] In this embodiment, a spiral cooling pipe 21 is sleeved on the outer side of the terminal component 19, and both ends of the cooling pipe 21 are connected to the cooling device via connecting pipes. The invention further includes a spiral cooling pipe 21, which is sleeved on the outer side of the terminal component 19 and connected to the cooling device via connecting pipes. Based on this structure, the invention can achieve efficient local cooling of the power terminal assembly 5, the main heat source, during the operation of the charging connector. The spiral cooling pipe 21 forms a surrounding cooling path, allowing the coolant to evenly remove heat from all circumferential parts of the terminal component 19 during flow, avoiding localized hot spots. Simultaneously, the spiral structure significantly extends the heat exchange path length within the limited space of the plug housing 3, improving cooling efficiency. This allows the power terminal assembly 5 to maintain a suitable operating temperature range under prolonged high-load operation, effectively suppressing problems such as increased contact resistance, material aging, or decreased insulation performance caused by temperature rise. This ensures the stability and safety of megawatt-level high-power charging and significantly extends the connector's service life.

[0020] In this embodiment, a support tube is also installed on the floating plate 4, and a vortex plate 23 is installed on the outer side of the support tube. The vortex plate 23 is made of elastic material. The support tube is connected to the inner end of the vortex plate 23, and one connecting tube is also connected to the outer end of the vortex plate 23. The other connecting tube is fixedly installed on the floating plate 4. The vortex plate 23 is made of elastic material, such as spring steel. Since the cooling pipe 21 can generate slight deformation and vibration when the coolant flows through it, this characteristic allows the vortex plate 23 to absorb the radial impact energy generated during the insertion of the plug end 1 and the socket end 2, adapting to the tensile changes of the cooling pipe 21. It can also provide elastic radial restoring force to the terminal piece 19, ensuring the subsequent connection effect of the device.

[0021] In this embodiment, the support tube includes an outer tube 22, a central column 24 is slidably inserted into the inner side of the outer tube 22, a pressure plate 25 is fixed to the outer end of the central column 24, and a friction plate 26 is fixedly installed on the inner side of the pressure plate 25; a pressure column 27 is installed on the inner side of the socket housing 12. When the plug end 1 and the socket end 2 are engaged, the pressure column 27 corresponds to the pressure plate 25. At this time, the pressure column 27 can press the pressure plate 25 toward the floating plate 4. At this time, the friction plate 26 and the vortex plate 23 are in contact, which plays a role in preventing the deformation of the turbine plate. The vortex plate 23 will not be stretched under the pressure. At this time, the cooling pipe 21 can be closely attached to the outer surface of the terminal piece 19 and will not be disturbed by other vibrations, making the charging process more stable.

Claims

1. A megawatt-level MCS rail transit charging connector, characterized in that: The device includes a plug end and a socket end. The plug end includes a plug housing, a floating plate installed at the front end of the plug housing, and a power terminal assembly passing through the floating plate. A limiting ring is installed on the inner side of the plug housing. The limiting ring is slidably installed in a plug hole formed on the end face of the plug housing along the axial direction. An annular limiting groove for limiting the floating plate is formed on the inner side of the limiting ring. Multiple radial elastic support members are evenly distributed circumferentially between the floating plate and the limiting ring. A limiting plate is also installed on the inner side of the plug housing. The limiting plate and the limiting ring are axially spaced. An axial elastic support member is provided between the limiting plate and the limiting ring. The socket end includes a socket housing and a mating terminal embedded in the socket housing. The mating terminal corresponds to the power terminal assembly.

2. The megawatt-level MCS rail transit charging connector according to claim 1, characterized in that: The floating plate has through holes. The power terminal assembly includes a base, a support column, a helical spring, a deflection cap, and a terminal piece. The base is fixed to the inner side of the floating plate, and the support column is fixed on the base. The deflection cap has a hollow cylindrical structure. The support column is connected to the deflection cap through the helical spring. The deflection cap covers the outside of the support column and the helical spring. The deflection cap passes through the through hole and is connected to the terminal piece. The terminal piece is installed on the outer end of the deflection cap.

3. The megawatt-level MCS rail transit charging connector according to claim 2, characterized in that: The terminal assembly includes multiple terminal bodies evenly spaced along the circumference of the deflection cap. The terminal bodies are arc-shaped elongated block structures, and the multiple terminal bodies are combined to form a cylindrical contact interface that mates with the mating terminal.

4. A megawatt-level MCS rail transit charging connector according to claim 3, characterized in that: A spiral cooling pipe is fitted on the outside of the terminal piece, and both ends of the cooling pipe are connected to the cooling device through connecting pipes.

5. A megawatt-level MCS rail transit charging connector according to claim 4, characterized in that: Support pipes are installed on the floating plate, and vortex plates are installed on the outside of the support pipes. The vortex plates are made of elastic material. The support pipes are connected to the inner ends of the vortex plates. One of the connecting pipes is connected to the outer end of the vortex plates, and the other connecting pipe is fixedly installed on the floating plate.

6. A megawatt-level MCS rail transit charging connector according to claim 5, characterized in that: The support tube includes an outer tube, a central column is slidably inserted into the inner side of the outer tube, a pressure plate is fixed to the outer end of the central column, and a friction plate is fixedly installed on the inner side of the pressure plate; a pressure column is installed on the inner side of the socket housing, and the pressure column corresponds to the pressure plate when the plug end and the socket end are engaged.

7. A megawatt-level MCS rail transit charging connector according to claim 1, characterized in that: The axial elastic support includes a rubber pad, which is fixed inside the plug housing. The rubber pad is installed between the limiting plate and the limiting ring, and both sides of the rubber pad are fixedly connected to the end faces of the limiting plate and the limiting ring, respectively.

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