Large-current self-locking high-voltage connector and high-voltage switching power supply

Abstract

The utility model provides a large-current self-locking high-voltage connector and a high-voltage switching power supply. The high-voltage connector comprises a plug and a socket. A plug shell of the plug forms a first cavity connected with a first high-voltage line, one end of the plug shell is connected with a plug core, the plug core is electrically connected with the first high-voltage line, and the outer surface of the other end of the plug shell is provided with at least one locking groove. A second cavity connected with the plug shell is formed in a socket shell of the socket, a socket hole component is arranged in the second cavity and electrically connected to the second high-voltage wire, and a socket hole matched with the plug core is formed in the socket hole component. The socket is provided with a locking sleeve at a cavity opening of the second cavity, the locking sleeve is provided with a notch portion extending in the length direction, a connecting protrusion is formed on the inner surface of the locking sleeve, the outer diameter of the plug shell is larger than the inner diameter of the socket shell at the position of the connecting protrusion, and when the plug shell and the socket shell are connected in an inserted mode, the locking sleeve is arranged outside the plug shell in a sleeving mode. And the connecting bulge is clamped in the locking groove after opening the locking sleeve, so that reliable connection between the plug and the socket is realized.

Description

Technical Field

[0001] This utility model generally relates to the field of high-voltage connectors, and more specifically to a high-current self-locking high-voltage connector and a high-voltage switching power supply. Background Technology

[0002] In high-voltage electrical equipment such as high-voltage switching power supplies, high-voltage connectors are important components for high-voltage output conversion and key connection devices in power systems.

[0003] High-voltage connectors are difficult to withstand due to their structural pressure. Protection typically involves wrapping with insulating tape or using a potting compound with certain pressure resistance. Once a potted connector is damaged, repair is complex and often requires replacement. After the plug and socket of a high-voltage connector are connected, they are usually locked using a nut or keyway. This relies on the stress at the contact points between the plug and socket electrodes. However, the nut locking method can be inconvenient for insertion and removal, and the keyway locking method can loosen over time. Furthermore, under prolonged operation at high current, electrode aging can cause loosening between electrodes, or even the plug to detach completely, potentially leading to arcing and safety hazards, and significantly reducing the lifespan of the connector or power supply product.

[0004] Therefore, there is a need to provide a high-current self-locking high-voltage connector and a high-voltage switching power supply to at least partially solve the above problems. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, a first aspect of this utility model provides a high-current self-locking high-voltage connector, the high-voltage connector comprising:

[0007] A plug, comprising a plug housing and a plug core, one end of the plug housing being connected to the plug core, the plug housing having a first cavity for connecting to a first high-voltage line, the plug core being electrically connected to the first high-voltage line, and the outer surface of the other end of the plug housing having at least one locking groove; and

[0008] A socket, comprising a socket housing and a socket hole component for a second high-voltage line, the socket housing having a second cavity for connecting to the plug housing, the socket hole component being disposed within the second cavity, the socket hole component having a socket hole matching the plug core, the socket hole component being used for electrical connection to the second high-voltage line;

[0009] The second cavity has a locking sleeve at its opening. The inner surface of the locking sleeve forms a connecting protrusion. The outer diameter of the plug shell is larger than the inner diameter of the socket shell at the connecting protrusion. The locking sleeve has a notch extending along its length. When the plug shell and the socket shell are plugged in, the locking sleeve is fitted over the plug shell, and the connecting protrusion is located in the locking groove and is locked in place by the locking groove.

[0010] Optionally, the locking groove is constructed as an annular groove, and a plurality of locking grooves are spaced apart on the outer surface of the other end of the plug housing along the length direction; and / or

[0011] The locking sleeve has a plurality of notches, which are spaced apart around the axis of the locking sleeve.

[0012] Optionally, one of the outer surface of the plug housing and the inner surface of the socket housing is provided with an anti-rotation protrusion, and the other of the outer surface of the plug housing and the inner surface of the socket housing is provided with a groove that matches the anti-rotation protrusion.

[0013] Optionally, the high-voltage connector further includes a limiting nut, and the outer surface of the socket housing is provided with an external thread that matches the limiting nut.

[0014] Optionally, a limiting protrusion is provided on the outer surface of the socket housing.

[0015] Optionally, the limiting protrusion is provided with an annular groove for installing a sealing ring; and / or

[0016] The limiting protrusion is provided with a connecting hole.

[0017] Optionally, the high-voltage connector further includes an insulating protective sleeve, which is fitted over the second high-voltage line. The insulating protective sleeve is integrally formed with the socket housing, or the insulating protective sleeve is threadedly connected to the socket housing; and / or

[0018] The socket housing is constructed of polytetrafluoroethylene (PTFE).

[0019] Optionally, a crown spring is provided inside the socket hole.

[0020] Optionally, the plug core is constructed as a QBe2 beryllium bronze plug core, and the outer surface of the plug core is provided with a silver plating layer.

[0021] A second aspect of this utility model also provides a high-voltage switching power supply, the high-voltage switching power supply including a power supply housing, on which a high-voltage connector according to the first aspect of this utility model is installed.

[0022] This utility model provides a high-current self-locking high-voltage connector and a high-voltage switching power supply having the high-voltage connector. The high-voltage connector includes a socket and a plug. The socket shell has a locking sleeve with a notch extending along its length and a connecting protrusion on its inner surface. The plug shell has a locking groove on its outer surface. The outer diameter of the plug shell is larger than the inner diameter of the connecting protrusion. When the socket and plug are inserted, the plug shell squeezes the locking sleeve to deform it slightly so that the locking groove and the connecting protrusion can engage and lock together, thereby realizing the self-locking function of the high-voltage connector.

[0023] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0024] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings,

[0025] Figure 1 This is a three-dimensional structural diagram of the plug portion of a high-voltage connector according to a preferred embodiment of the present invention.

[0026] Figure 2 This is a three-dimensional structural diagram of a high-voltage connector according to a preferred embodiment of the present invention;

[0027] Figure 3 for Figure 2 A three-dimensional structural diagram of the socket portion of a medium- and high-voltage connector;

[0028] Figure 4 for Figure 2 A cross-sectional structural diagram of a medium- and high-voltage connector;

[0029] Figure 5 This is a three-dimensional structural schematic diagram of a high-voltage connector according to another preferred embodiment of the present invention;

[0030] Figure 6 for Figure 5 A three-dimensional structural diagram of the socket portion of a medium- and high-voltage connector;

[0031] Figure 7 for Figure 5 A cross-sectional structural diagram of a medium- and high-voltage connector; and

[0032] Figure 8 A three-dimensional structural diagram of a high-voltage switching power supply according to a preferred embodiment of the present invention.

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

[0034] 100. High-voltage connector; 101. First high-voltage line; 102. Second high-voltage line; 110. Plug; 111. Plug shell; 112. Plug core; 113. First cavity; 114. Locking groove; 115. Anti-rotation protrusion; 120. Socket; 121. Socket shell; 122. Socket hole component; 123. Second cavity; 124. Locking sleeve; 125. Connecting protrusion; 126. Notch; 127. Slot; 128. Limiting protrusion; 129. Limiting nut; 130. Connecting hole; 131. Insulating protective sleeve; 231. Insulating protective sleeve; 200. High-voltage switching power supply; 210. Power supply box. Detailed Implementation

[0035] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0036] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments and should not be construed as being limited to the embodiments set forth herein.

[0037] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of the invention. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated feature, integral, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms “upper,” “lower,” “front,” “rear,” “left,” “right,” and similar expressions used in this invention are for illustrative purposes only and are not intended to be limiting.

[0038] The ordinal numbers such as "first" and "second" used in this invention are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."

[0039] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0040] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0041] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, which show representative embodiments of the present invention and are not intended to limit the present invention.

[0042] This utility model provides a high-current self-locking high-voltage connector 100 and a high-voltage switching power supply 200 having this high-current self-locking high-voltage connector 100. For ease of understanding, let's first consider... Figures 1 to 7 The structure of the high-voltage connector 100 of this utility model will be described.

[0043] The high-voltage connector 100 includes a plug 110 and a socket 120. One end of the plug 110 is connected to the first high-voltage line 101, and one end of the socket 120 is connected to the second high-voltage line 102. The other end of the plug 110 is used to engage with the other end of the socket 120.

[0044] Specifically, the plug 110 includes a plug shell 111 and a plug core 112. One end of the plug shell 111 is connected to the plug core 112, and the plug core 112 is electrically connected to the first high-voltage line 101. The outer surface of the other end of the plug shell 111 is provided with at least one locking groove 114. Furthermore, the plug shell 111 also forms a first cavity 113 for connecting the first high-voltage line 101, so as to increase the creepage distance and ensure the insulation effect.

[0045] For example, the plug core 112 and the plug housing 111 can be installed and fixed by means of a threaded connection. The plug core 112 and the first high-voltage wire 101 can be installed, fixed and electrically connected by means of welding.

[0046] The socket 120 includes a socket housing 121 and a socket hole member 122. The socket housing 121 has a second cavity 123 for connecting a plug housing 111. The socket hole member 122 has a socket hole and is disposed within the second cavity 123. The socket hole member 122 is electrically connected to a second high-voltage line 102.

[0047] Specifically, the socket housing 121 is provided with a locking sleeve 124 at the opening of the second cavity 123. The locking sleeve 124 is provided with a notch 126 extending along the length direction. A connecting protrusion 125 is formed on the inner surface of the locking sleeve 124. The outer diameter of the plug housing 111 is larger than the inner diameter of the socket housing 121 at the connecting protrusion 125.

[0048] When the plug 110 and the socket 120 are plugged in, the plug housing 111 and the socket housing 121 are plugged in and connected, the plug core 112 and the socket hole component 122 are plugged in and engaged, the locking sleeve 124 is fitted over the plug housing 111, and the connecting protrusion 125 is located in the locking groove 114 and is locked with the locking groove 114.

[0049] It is understood that the locking sleeve 124, by providing the notch 126, ensures that it can undergo slight elastic deformation in the radial direction after being squeezed, but without damaging the locking sleeve 124. This ensures that the plug shell 111 can squeeze the locking sleeve 124 and extend into the second cavity 123. When the plug core 112 and the socket hole component 122 are inserted, the locking groove 114 on the plug shell 111 just moves to the position of the connecting protrusion 125 of the locking sleeve 124. At this time, the locking sleeve 124 recovers from the deformed state, and the connecting protrusion 125 just engages with the locking groove 114, thereby locking the plug 110 and the socket 120.

[0050] For example, the socket hole component 122 can be integrally formed with the socket housing 121, or the socket hole component 122 can be connected to the socket housing 121 by means of snap-fit, threaded connection or sealing connection. It can be understood that the method of integrally forming the socket hole component 122 with the socket housing 121 is structurally simple, while the method of separate assembly of the socket hole component 122 and the socket housing 121 is convenient for maintenance.

[0051] First, combine Figures 1 to 7 The high-voltage connector 100 in this embodiment of the present invention is generally cylindrical in shape. Figure 1 In the illustrated embodiment, the locking groove 114 is constructed as an annular groove. Furthermore, along the length direction (i.e., the axial direction of the plug housing 111, which is also the insertion direction of the plug 110 and the socket 120), a plurality of locking grooves 114 are spaced apart on the outer surface of the plug housing 111. A plurality of connecting protrusions 125 corresponding to the positions of the locking grooves 114 can be provided on the inner surface of the locking sleeve 124 of the socket housing 121.

[0052] It is understandable that when there are multiple connecting protrusions 125, they can be designed to be of different sizes to achieve a better locking effect.

[0053] Preferably, an anti-rotation protrusion 115 can be provided on one of the outer surface of the plug housing 111 and the inner surface of the socket housing 121, and a groove 127 matching the anti-rotation protrusion 115 can be provided on the other, thereby restricting the rotation of the plug 110 and the socket 120. For high-voltage connectors 100 with multiple plug pins 112, this design can prevent the occurrence of misalignment of the socket 120. See also... Figure 1 , Figure 4 and Figure 7 In this embodiment, an anti-rotation protrusion 115 is provided on the outer surface of the plug housing 111, and a corresponding slot 127 is provided on the inner surface of the socket housing 121.

[0054] See Figure 2 , Figure 3 , Figure 5 and Figure 6 In the illustrated embodiment, the locking sleeve 124 has a plurality of notches 126, which are spaced apart around the axis of the locking sleeve 124. Preferably, the plurality of notches 126 are arranged in a circumferential array around the axis of the locking sleeve 124, which ensures that the compressive load of the plug 110 on the locking sleeve 124 can be evenly distributed when the plug 110 and the socket 120 are inserted and engaged, thus preventing damage to the locking sleeve 124 due to excessive deformation caused by local stress.

[0055] Furthermore, in this embodiment, the socket housing 121 is constructed of polytetrafluoroethylene (PTFE). PTFE possesses high temperature resistance (operating temperature up to 250°C); high voltage resistance: dielectric strength (DC breakdown voltage 60KV / mm); corrosion resistance (can be used for extended periods in insulating oil); in addition, the PTFE housing has a certain degree of rigidity and flexibility, ensuring that after the plug 110 is inserted into the socket 120, it can be locked in place by its own stress, effectively preventing the plug 110 from falling out, ensuring that the plug 110 and socket 120 are fully inserted, avoiding high-voltage arcing, and improving safety.

[0056] In this embodiment, the plug core 112 is constructed of QBe2 beryllium bronze, and its outer surface is plated with a silver layer. QBe2 beryllium bronze possesses excellent conductivity, high hardness, and high tensile strength, with a tensile strength reaching 580–700 MPa and a hardness of 150–250 HB, making the high-voltage connector 100 less prone to damage during insertion and removal. Furthermore, the silver plating on the outer surface of the plug core 112 improves the reliability of the soldered connection between the plug core 112 and the first high-voltage line 101, enhances conductivity, and gives the finished plug of the high-voltage connector 100 a good gloss and reflectivity, increasing the product's aesthetics.

[0057] Preferably, a crown spring is provided inside the socket hole of the socket hole component 122. It can be understood that the crown spring has multiple elastic contact points, so that the plug core 112 can be subjected to uniform force after being inserted into the crown spring. This can prevent the plug core 112 from rigidly contacting the socket hole component 122, thus protecting the plug core 112. Under the action of elasticity, it can also ensure that the crown spring and the plug core 112 can make stable and reliable contact.

[0058] refer to Figures 1 to 4 This is an embodiment of a high-voltage connector 100 according to the present invention, see reference. Figure 1 , Figures 5 to 7 This is another embodiment of the high-voltage connector 100 of this utility model. The main difference between the two embodiments lies in the structural design of the socket 120.

[0059] The high-voltage connector 100 also includes an insulating protective sleeve 131. The insulating protective sleeve 131 serves two purposes: firstly, it increases the creepage distance, providing high-voltage protection; secondly, it secures the second high-voltage line 102 to the socket housing 121. (See also...) Figures 2 to 4 In the illustrated embodiment, the insulating protective sleeve 131 is fitted over the second high-voltage line 102, and the insulating protective sleeve 131 is threadedly connected to the socket housing 121. Specifically, the socket housing 121 has an external thread at the end connected to the second high-voltage line 102, and the insulating protective sleeve 131 has a matching internal thread. Preferably, a high-voltage mark can also be provided on the insulating protective sleeve 131.

[0060] See Figures 5 to 7 In the embodiment shown, the insulating protective sleeve 231 is fitted over the second high-voltage line 102, and the insulating protective sleeve 231 and the socket housing 121 are integrally formed (see...). Figure 7 It is understood that the one-piece molding method can ensure the sealing of the socket 120 of the high-voltage connector 100. For example, the insulating protective sleeve 231 can be integrally molded with the socket housing 121 by means of insulating material potting.

[0061] refer to Figure 8 The second aspect of this utility model also provides a high-voltage switching power supply 200, which includes a power supply housing 210, on which a high-voltage connector 100 according to the first aspect of this utility model is mounted. Specifically, a socket housing 121 is fixedly mounted to the power supply housing 210, thereby allowing external devices to be connected to internal components of the power supply housing 210 via the high-voltage connector 100 of the first aspect of this utility model.

[0062] Considering that the high-voltage switching power supply 200 has different heat dissipation methods, the sealing requirements of the high-voltage connector 100 are different for the two common heat dissipation methods of liquid cooling and air cooling, and different sockets need to be selected according to different application scenarios.

[0063] The high-voltage connector 100 also includes a limiting nut 129, and the outer surface of the socket housing 121 is provided with an external thread that matches the limiting nut 129. After the socket housing 121 is installed into the power supply box 210, the limiting nuts 129 are tightened, and the power supply box 210 is secured by the two limiting nuts 129, thus achieving the installation and fixation of the socket housing 121 and the power supply box 210.

[0064] refer to Figures 2 to 7 The outer surface of the socket housing 121 is provided with a limiting protrusion 128. When the socket housing 121 is installed into the power supply box 210, the limiting protrusion 128 serves a positioning function. (Reference) Figures 2 to 4 In the embodiment shown, after the socket housing 121 is installed onto the power supply box 210, the limiting nut 129 is screwed on, and the power supply box 210 is clamped by the limiting nut 129 and the limiting protrusion 128, thereby realizing the installation and fixation of the socket housing 121 and the power supply box 210.

[0065] refer to Figure 5 and Figure 6 In the embodiment shown, the limiting protrusion 128 is provided with a connecting hole 130, which can cooperate with the connecting pin to install and fix the socket shell 121 to the power supply box 210.

[0066] Furthermore, to improve the sealing effect, an annular groove (not shown) for installing the sealing ring can be provided on the limiting protrusion 128. When the socket housing 121 is installed to the power supply box 210, a seal can be achieved through the sealing ring.

[0067] In a preferred embodiment of this utility model, the high-voltage connector can withstand a voltage of up to DC30kV and an overcurrent strength of up to 50A, meeting the application scenarios of high withstand voltage and high overcurrent strength. Furthermore, the plug and socket can achieve self-locking after insertion, improving the safety of use.

[0068] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0069] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A high-current self-locking high-voltage connector, characterized in that, The high-voltage connector includes: A plug, comprising a plug housing and a plug core, one end of the plug housing being connected to the plug core, the plug housing having a first cavity for connecting to a first high-voltage line, the plug core being electrically connected to the first high-voltage line, and the outer surface of the other end of the plug housing having at least one locking groove; and A socket, comprising a socket housing and a socket hole component, the socket housing having a second cavity for connecting to a plug housing, the socket hole component being disposed within the second cavity, the socket hole component having a socket hole that matches the plug core, the socket hole component being used for electrical connection to a second high-voltage line; The second cavity has a locking sleeve at its opening. The inner surface of the locking sleeve forms a connecting protrusion. The outer diameter of the plug shell is larger than the inner diameter of the socket shell at the connecting protrusion. The locking sleeve has a notch extending along its length. When the plug shell and the socket shell are plugged in, the locking sleeve is fitted over the plug shell, and the connecting protrusion is located in the locking groove and is locked in place by the locking groove.

2. The high-voltage connector according to claim 1, characterized in that, The locking groove is an annular groove, and multiple locking grooves are spaced apart along the length direction on the outer surface of the other end of the plug housing; and / or The locking sleeve has a plurality of notches, which are spaced apart around the axis of the locking sleeve.

3. The high-voltage connector according to claim 1, characterized in that, One of the outer surface of the plug housing and the inner surface of the socket housing is provided with an anti-rotation protrusion, and the other of the outer surface of the plug housing and the inner surface of the socket housing is provided with a groove that matches the anti-rotation protrusion.

4. The high-voltage connector according to claim 1, characterized in that, The high-voltage connector also includes a limiting nut, and the outer surface of the socket housing is provided with an external thread that matches the limiting nut.

5. The high-voltage connector according to claim 1, characterized in that, Limiting protrusions are provided on the outer surface of the socket housing.

6. The high-voltage connector according to claim 5, characterized in that, The limiting protrusion is provided with an annular groove for installing a sealing ring; and / or The limiting protrusion is provided with a connecting hole.

7. The high-voltage connector according to any one of claims 1 to 6, characterized in that, The high-voltage connector further includes an insulating protective sleeve, which is fitted over the second high-voltage line. The insulating protective sleeve is integrally formed with the socket housing, or the insulating protective sleeve is threadedly connected to the socket housing; and / or The socket housing is constructed of polytetrafluoroethylene (PTFE).

8. The high-voltage connector according to claim 7, characterized in that, A crown spring is installed inside the socket hole.

9. The high-voltage connector according to claim 8, characterized in that, The plug core is constructed of QBe2 beryllium bronze, and the outer surface of the plug core is provided with a silver plating layer.

10. A high-voltage switching power supply, characterized in that, The high-voltage switching power supply includes a power supply housing, on which a high-voltage connector according to any one of claims 1 to 9 is installed.

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