Quick-change terminal and socket

Abstract

The invention discloses a quick-change terminal and socket, which comprises a base, a first contact piece and a second contact piece, and is characterized in that the first contact piece is arranged in the base, and the second contact piece is detachably connected with the base; wherein the second contact element is internally provided with a plug-in slot communicated with the base, and one end, close to the base, of the second contact element abuts against the first contact element. The device can resist arc ablation and is convenient to quickly replace after being damaged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of technology, and more specifically to a quick-change terminal block and socket. Background Technology

[0002] With the rapid development of new energy vehicles, the market demand for DC fast charging is increasing. As a key component for power transmission, the reliability and durability of charging connectors are crucial. During charging, the charging gun needs to be frequently plugged and unplugged from the vehicle's socket. Each time this happens, an electric arc is generated at the contact point when the current is switched on and off. This arc has high-temperature characteristics and will repeatedly burn the surface of the contact components. In traditional terminal structures, the contact components that carry the current transmission are also the direct recipients of arc erosion. Long-term arc erosion will lead to oxidation and carbonization of the contact surface, increasing contact resistance, which in turn will cause more severe heating and even burnout, seriously affecting charging efficiency and posing safety hazards. When the contact components are damaged, it is usually necessary to replace the entire terminal module or the entire socket, which not only increases material costs but also makes the repair process complex and time-consuming. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a quick-change terminal and socket that can withstand electric arc erosion and is easy to replace quickly after damage, so as to reduce maintenance costs and improve the overall reliability of charging equipment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A quick-change terminal includes a base, a first contact and a second contact, wherein the first contact is disposed in the base and the second contact is detachably connected to the base.

[0006] The second contact has a slot that connects to the base, and one end of the second contact near the base abuts against the first contact.

[0007] In one embodiment, the second contact includes a connecting seat and an elastic portion. The elastic portion is disposed at one end of the connecting seat away from the base. A portion of the insertion groove is provided in the elastic portion, and the other portion of the insertion groove is provided in the connecting seat.

[0008] In one embodiment, the elastic portion includes at least two spring pieces that form part of the insertion groove, and a spacer groove is provided between two adjacent spring pieces.

[0009] In one embodiment, the elastic part is provided with an elastic locking member, which is sleeved on the outer peripheral wall of the elastic part.

[0010] In one embodiment, the base is provided with an electrical cavity, which is connected to the insertion slot. The electrical cavity includes a connecting slot and a receiving slot in sequence along the direction from the second contact to the base. The inner diameter of the connecting slot is larger than the inner diameter of the receiving slot. The outer peripheral wall of the connecting seat is detachably connected to the inner peripheral wall of the connecting slot. The first contact is disposed in the receiving slot, and the connecting seat abuts against the first contact.

[0011] In one embodiment, the first contact element includes a wire, the wire being a spiral wire and having elasticity; the spiral wire surrounds a through groove for communicating with the insertion slot, the outer peripheral wall of the through groove abutting against the inner peripheral wall of the receiving groove; the inner peripheral wall of the through groove is smaller than the inner peripheral wall of the insertion slot, so that the connecting seat abuts against the first contact element.

[0012] In one embodiment, the connector and the connecting groove are connected by a snap-fit ​​connection, or the connector and the connecting groove are connected by a threaded connection.

[0013] In one embodiment, an insulating layer is coated on the base corresponding to the connection between the first contact and the second contact.

[0014] In one embodiment, the inner wall surface of the second contact member is provided with a heat-conducting layer.

[0015] A socket comprising quick-change terminals as described in any of the preceding claims.

[0016] As can be seen from the above technical solutions, the present invention has the following advantages:

[0017] The second contact has a socket connected to the base, with its end near the base abutting against the first contact. This ensures that the electric arc generated during live insertion and removal primarily acts on the second contact, which absorbs the arc erosion during insertion and removal, effectively protecting the first contact carrying the main current from damage. By separating the functions of the arc-bearing component and the main current-carrying component, the reliability and service life of the quick-change terminal under frequent insertion and removal conditions are improved, ensuring the efficiency and safety of the charging process. Furthermore, when the second contact's performance degrades or it becomes damaged due to long-term arc erosion, it is not necessary to replace the entire terminal or socket; only its removal from the base and replacement with a new second contact are required. This modularization and rapid replacement of critical vulnerable components significantly reduces overall maintenance costs and downtime caused by contact erosion.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This invention provides an overall structural schematic diagram of a quick-change terminal;

[0021] Figure 2 This is a schematic diagram of the structure of a quick-change terminal from another angle provided by the present invention;

[0022] Figure 3 A cross-sectional schematic diagram of a quick-change terminal provided by the present invention in one embodiment;

[0023] Figure 4 A cross-sectional schematic diagram of a quick-change terminal provided by the present invention in another embodiment;

[0024] Figure 5 A cross-sectional schematic diagram of a quick-change terminal provided by the present invention in another embodiment.

[0025] Figure Labels

[0026] 1. Base; 11. Connecting groove; 12. Receiving groove; 2. First contact element; 21. Conducting groove; 3. Second contact element; 31. Connecting seat; 311. Boss; 312. External thread; 32. Elastic part; 321. Spring; 322. Spacer groove; 323. Elastic locking element; 33. Insertion groove. Detailed Implementation

[0027] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 invention.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0030] First, for ease of understanding, the power supply principle of the quick-change terminal in this application needs to be explained: The plug end of the charging gun is inserted into the contact of the quick-change terminal and forms physical contact and electrical conduction. The plug end and the inner wall of the contact of the quick-change terminal are tightly fitted to establish a stable current transmission channel. The current output by the charging gun is transmitted to the contact of the quick-change terminal through the plug end, and then connected to the circuit of the electrical equipment or power supply equipment through the contact of the quick-change terminal to realize the transmission of electrical energy. At the same time, during the insertion and removal process, the contact and separation of the plug end of the charging gun and the contact of the quick-change terminal will be accompanied by certain mechanical forces and electrical changes.

[0031] See Figures 1 to 5 As shown in the figure, an embodiment of the present invention discloses a quick-change terminal, which includes a base 1, a first contact 2, and a second contact 3. The first contact 2 is installed inside the base 1, and the second contact 3 is detachably connected to the base 1. A insertion groove 33 is provided inside the second contact 3, which communicates with the base 1, and the end of the second contact 3 near the base 1 abuts against the first contact 2. It is understood that the insertion groove 33 extends axially and communicates with the interior of the base 1.

[0032] Specifically, in this embodiment, the second contact 3 is the first contact point made when the charging gun plug is inserted, and also the last contact point to be removed when the charging gun plug is pulled out. By using the second contact 3 as the first contact and last disengagement component during the insertion and removal process, all the electric arc inevitably generated during live insertion and removal is concentrated on the second contact 3. This allows the second contact 3 to primarily bear the arc erosion at the moment of insertion and removal, thereby isolating the first contact 2, which carries the main current transmission task, from the risk of arc erosion and effectively protecting the first contact 2 from arc damage. During operation, when a charging connection is made, the charging gun plug is inserted into the slot 33 of the second contact 3. The plug first contacts the second contact 3 and continues to be inserted until the plug forms an indirect connection with the first contact 2 through the slot 33. At this time, the main current is stably transmitted through the first contact 2. When a disconnection operation is performed, the charging gun plug is pulled out. The plug first loses the conductive state from the first contact 2 and finally completely separates from the second contact 3. The electric arc during the entire insertion and removal process is mainly generated between the second contact 3 and the charging gun plug.

[0033] It is understandable that the second contact 3 is a component specifically designed to withstand arc erosion. After prolonged and frequent plugging and unplugging, its performance will gradually decline or even be directly damaged. In this embodiment, through a detachable connection, the second contact 3 can be directly removed from the base 1 for replacement after damage, without disassembling the base 1 and the first contact 2. This allows for the individual replacement of vulnerable components, significantly reducing maintenance costs and minimizing downtime for equipment maintenance, thus ensuring the continuous and stable operation of the charging equipment.

[0034] In one embodiment, the second contact 3 is composed of a connecting seat 31 and an elastic part 32. The elastic part 32 is disposed at the end of the connecting seat 31 away from the base 1. The insertion groove 33 is divided into two parts, wherein the elastic part 32 has an outer section of the insertion groove 33 inside, and the connecting seat 31 has an inner section of the insertion groove 33 inside. The two sections of the insertion groove 33 are coaxially connected to form a complete plug insertion channel. The elastic part 32 constitutes the specific contact part that is first contacted when the charging gun plug is inserted and last to be removed when it is pulled out.

[0035] Specifically, the elastic deformation characteristics of the elastic part 32 make the contact process during the insertion of the charging gun plug smoother. Simultaneously, the elastic part 32, as the first contact and last disengagement point in the insertion and removal process, enhances the tightness of the contact, ensuring that the elastic part 32 of the charging gun plug is always encased within the elastic part 32 during insertion and removal. This ensures that the elastic part 32 is concentrated to withstand arc erosion, further protecting the first contact 2. During operation, when the charging gun plug is inserted, it first contacts the outer section of the insertion groove 33 within the elastic part 32. The insertion force causes the elastic part 32 to undergo adaptive elastic deformation, providing guidance and clamping force for the plug insertion. Subsequently, the plug enters the inner section of the insertion groove 33 within the connector 31, ultimately achieving conductivity with the first contact 2. When the charging gun plug is removed, it first exits the inner section of the connector 31 and disengages from the first contact 2, then gradually exits the outer section under the elastic enveloping force of the elastic part 32, finally completely separating from the elastic part 32. During the separation process, an arc is always generated between the elastic part 32 and the plug.

[0036] It is understood that in this embodiment, the elastic part 32 and the connecting seat 31 are integrally formed. However, in other embodiments, the connection method between the elastic part 32 and the connecting seat 31 can be adaptively designed according to actual needs. The elastic part 32 can be integrally formed or fixedly installed on the connecting seat 31, or it can be detached and installed on the connecting seat 31. No specific limitation is made here.

[0037] Understandably, in this embodiment, the elastic part 32 is made of a high-temperature resistant material with good elasticity and resistance to arc erosion, thereby ensuring the arc resistance of the second contact 3 and preventing rapid failure at high temperatures. This achieves the effect of arc erosion resistance, enabling the second contact 3 to withstand the impact of a large arc, extending its service life, and ensuring the stable operation of the quick-connect terminal under frequent plugging and unplugging conditions. Simultaneously, because the contact area between the elastic part 32 and the charging gun plug is designed as a fitted structure with a sufficiently large contact area, the heat generated by the large arc impact during live plugging and unplugging can be quickly conducted to the overall structure of the second contact 3. Subsequently, the heat is dissipated through the contact area between the second contact 3 and the air.

[0038] Furthermore, a heat-conducting layer (not shown) is provided on the inner wall surface of the second contact member 3, that is, the inner side wall of the insertion groove 33. The heat-conducting layer is in direct contact with the charging gun plug, and the second contact member 3 maintains the contact positioning that is the first to contact when the charging gun plug is inserted and the last to disengage when it is pulled out.

[0039] Specifically, in this embodiment, the high thermal conductivity of the heat-conducting layer is utilized to rapidly conduct the heat generated by the large arc impact during the plug-in and plug-out of the charging gun plug to the overall structure of the second contact 3. This prevents heat accumulation between the second contact 3 and the plug, thus preventing the plug and the second contact 3 from degrading in material performance or being damaged due to overheating, and extending the service life of the plug and the second contact 3. At the same time, the heat-conducting layer does not affect the contact conductivity between the second contact 3 and the plug, ensuring that it functions properly as the first contact and last disengagement component. It is understood that the heat-conducting layer may use materials such as a metal coating with a high thermal conductivity that do not affect the contact conductivity between the second contact 3 and the plug; no specific limitations are made here.

[0040] In one embodiment, the elastic part 32 is composed of at least two independent spring pieces 321. All spring pieces 321 are evenly distributed in the circumferential direction and surround to form the outer section of the insertion groove 33. A gap groove 322 is reserved between two adjacent spring pieces 321. The port of the elastic part 32 formed by the enclosure constitutes the contact end that is the first to contact when the charging gun plug is inserted and the last to detach when it is pulled out.

[0041] Specifically, the deformation capability of the elastic part 32 is enhanced by the enclosing structure of multiple spring pieces 321, enabling the elastic part 32 to adapt to charging gun plugs with different dimensional deviations. The spacer groove 322 provides sufficient space for the elastic deformation of the spring pieces 321, and at the same time, the spacer groove 322 can accelerate the dissipation of heat generated by the electric arc during insertion and removal, preventing the spring pieces 321 from being damaged due to overheating, and ensuring the stability of the spring pieces 321 as the first contact and last disengagement part. It should be noted that the initial groove diameter of the insertion groove 33 formed by the multiple spring pieces 321 is slightly smaller than the outer diameter of the charging gun plug. When the charging gun plug is inserted, the end of the charging gun plug first contacts the port of the surrounding spring 321. The insertion force of the plug causes each spring 321 to open outward, increasing the width of the spacer groove 322, and the plug smoothly enters the insertion groove 33. At the same time, the elastic restoring force of the elastic part 32 makes the inner wall of the spring 321 fit tightly against the outer wall of the charging gun plug. When it is pulled out, the plug moves outward. Due to the elastic restoring force of the elastic part 32, the inner wall of the spring 321 fits tightly against the outer wall of the charging gun plug. Before the plug finally detaches from the port of the spring 321, an electric arc is always generated between the spring 321 and the plug during its outward movement. The arc heat is quickly dissipated through the spring 321 and the spacer groove 322.

[0042] It is understood that in this embodiment, the elastic part 32 preferably uses eight spring pieces 321 arranged in a circumferential array to form part of the insertion groove 33. However, in other embodiments, the number of spring pieces 321 can be appropriately increased or decreased based on actual needs such as insertion and extraction force and insertion and extraction frequency, and the thickness of the spring pieces 321 and the width of the spacer groove 322 can be adjusted to optimize the elastic deformation range and heat dissipation effect.

[0043] Furthermore, in order to further ensure that the electric arc is always generated between the spring 321 and the charging gun plug, it is preferable to provide an elastic locking member 323 on the outer peripheral wall of the elastic part 32. When the elastic locking member 323 is in its natural state, it applies an inward pre-tightening force to the elastic part 32, so that the insertion groove 33 enclosed by the elastic part 32 maintains a preset size.

[0044] Specifically, the pre-tightening force of the elastic locking member 323 enhances the tightness of the contact between the elastic part 32 and the charging gun plug, preventing poor contact caused by the decrease in elasticity of the elastic part 32 after long-term use. At the same time, the elastic locking member 323 can limit the excessive deformation of the elastic part 32, protect the elastic part 32 from mechanical damage, ensure the stability of the elastic part 32 as an arc-concentrated bearing component, and extend its service life.

[0045] In this embodiment, when the charging gun plug is inserted, it first contacts the elastic part 32 and pushes the spring piece 321 to expand outward. The elastic locking member 323 is then stretched and generates a larger reverse preload force. After the plug is fully inserted, the preload force of the elastic locking member 323 makes the spring piece 321 fit tightly against the outer wall of the plug, ensuring stable conduction. When pulled out, the plug gradually withdraws, and the elastic locking member 323 always ensures that the spring piece 321 fits against the outer wall of the plug until the plug finally separates from the elastic part 32. The elastic locking member 323 provides a stable preload force to the elastic part 32 throughout the process, ensuring the reliability of the contact process.

[0046] Understandably, in this embodiment, the elastic locking member 323 is a metal elastic ring, which is sleeved at the port position of the elastic part 32 to ensure that the preload can act on the spring piece 321 and the plug-in. Furthermore, in order to ensure the spatial regularity of the quick-connect terminal, an annular embedding groove is provided on the outer peripheral wall of the elastic part 32 for embedding the metal elastic ring, so that the outer wall of the metal elastic ring and the outer wall of the elastic part 32 are on the same plane.

[0047] In one embodiment, an electrical cavity is provided inside the base 1. The electrical cavity is coaxially connected to the insertion slot 33 of the second contact 3. The electrical cavity is divided into two parts, a connecting slot 11 and a receiving slot 12, along the direction from the second contact 3 to the base 1. The inner diameter of the connecting slot 11 is larger than the inner diameter of the receiving slot 12. The first contact 2 is fixedly installed in the receiving slot 12. The outer peripheral wall of the connecting seat 31 is detachably connected to the inner peripheral wall of the connecting slot 11. The end of the connecting seat 31 near the base 1 abuts against the first contact 2. The inlet end of the insertion slot 33 of the second contact 3 is the part that the charging gun plug first contacts. The end of the connecting seat 31 away from the base 1 is the part that the plug last detaches when it is pulled out.

[0048] Specifically, the first contact 2 is inserted into and fixed in the receiving groove 12, and then the connecting seat 31 of the second contact 3 is inserted into and fixed in the connecting groove 11, so that the connecting seat 31 tightly abuts against the first contact 2, forming a reliable heat conduction and electrical conduction path. The segmented structure of the electrical cavity achieves precise assembly and functional separation of the first contact 2 and the second contact 3. The connecting groove 11 provides a stable assembly base for the second contact 3, while the receiving groove 12 provides initial protection for the first contact 2. The abutting structure between the connecting seat 31 and the first contact 2 ensures that the arc and heat generated by insertion and removal during current transmission can be effectively transferred to the second contact 3 through the abutting surface. This allows the second contact 3 to act as the main arc-bearing and heat-dissipating component, preventing the accumulation of arc and heat at the first contact 2, thereby preventing damage to the first contact 2 due to arc erosion or high temperature, and ensuring the stability of the main current transmission.

[0049] During charging, the charging gun plug first contacts the inlet end of the insertion slot 33 of the second contact 3 and is inserted. It conducts through the insertion slot 33 and the electrical cavity to the first contact 2. The main current is stably transmitted through the second contact 3, the connecting seat 31, and the first contact 2. The electric arc and heat generated by the hot plugging and unplugging are transferred to the second contact 3 through the contact surface between the connecting seat 31 and the first contact 2. The second contact 3 bears the arc erosion and dissipates heat outward. When the plug is pulled out, it first separates from the first contact 2, then exits from the inner section of the connecting seat 31, and finally separates from the inlet end of the second contact 3. The electric arc and heat are always guided to the second contact 3, effectively protecting the first contact 2.

[0050] It is understandable that, in order to further enhance the tightness of the contact, an elastic conductive pad can be added at the contact point between the connector 31 and the first contact 2 to improve the efficiency of arc and heat transfer, while adapting to the slight deformation of the first contact 2 and ensuring the stability of the contact after long-term use. This is not limited here.

[0051] In one embodiment, the first contact 2 is a spiral wire with good elasticity. The spiral wire forms a through groove 21, which is coaxially connected to the insertion groove 33 of the second contact 3. The outer peripheral wall of the through groove 21 is in close contact with the inner peripheral wall of the receiving groove 12. The inner peripheral wall size of the through groove 21 is smaller than the inner peripheral wall size of the insertion groove 33, so that the connecting seat 31 of the second contact 3 can be in close contact with the end of the spiral wire.

[0052] Specifically, the elastic properties of the spiral wire enhance the tightness of the contact with the connector 31. Simultaneously, the spiral structure increases the conductive area of ​​the first contact 2. A larger conductive area reduces resistance during current transmission, decreases heat generation, and allows for a larger current load, thus achieving stable high-current transmission and preventing problems such as overheating and burning caused by insufficient conductive area. This ensures the safety and reliability of the quick-connect terminal in high-current charging scenarios. The dimensional difference between the conductive groove 21 and the insertion groove 33 further clarifies the positioning of the second contact 3 as the first contact and last disengagement component during insertion / removal, ensuring that the electric arc only acts on the second contact 3, preventing damage to the spiral wire from the arc. Furthermore, the elastic properties of the spiral wire, combined with the contact structure of the connector 31, further guarantee the stability and continuity of the current transmission path. When the charging gun plug is inserted, it first enters the insertion slot 33 through the port of the second contact 3. After the end of the plug passes through the insertion slot 33, it corresponds to the conduction slot 21 of the spiral wire, thus realizing the current conduction. When it is pulled out, the plug first separates from the spiral wire, then moves inside the second contact 3, and finally separates from the outer end of the second contact 3. During the whole process, the electric arc is generated between the second contact 3 and the plug, and the spiral wire only undertakes the task of current transmission.

[0053] It is understood that in this embodiment, the spiral wire is made of a highly conductive metal material, and the number of spiral turns is set according to the conductivity requirements to ensure the conductivity effect. At the same time, in order to adapt to different current transmission requirements, the spiral angle of the spiral wire can be adjusted to optimize its elastic performance and conductive area. No specific limitation is made here.

[0054] In one embodiment, the connecting seat 31 of the second contact member 3 and the connecting groove 11 of the base 1 are connected by a snap-fit ​​connection or a threaded connection.

[0055] See Figure 4 and Figure 5 As shown, in an optional embodiment of the above example, the snap-fit ​​connection is achieved by the engagement of the protrusion 311 on the outer peripheral wall of the connecting seat 31 with the slot on the inner peripheral wall of the connecting groove 11. When using the snap-fit ​​connection, during assembly, the connecting seat 31 is inserted into the connecting groove 11, and the protrusion 311 snaps into the slot for fixation, at which point the second contact 3 is positioned. During disassembly, external force is applied to disengage the protrusion 311 from the slot, allowing the second contact 3 to be removed. In this embodiment, a rectangular protrusion 311 can be provided at the end of the connecting seat 31 near the first contact 2, with the connecting groove 11 corresponding to the position of the protrusion 311; alternatively, a triangular protrusion 311 can be provided in the middle section of the connecting seat 31, with the connecting groove 11 corresponding to the position of the protrusion 311. It is understood that in other embodiments, the form and position of the protrusion 311 on the connecting seat 31 can be adaptively designed based on actual needs, and are not specifically limited here.

[0056] In one optional embodiment of the above embodiments, the snap-fit ​​boss 311 adopts an elastic structure for easy insertion and removal.

[0057] See Figure 3 As shown, in another optional embodiment of the above example, the threaded connection is achieved by the engagement of the external thread 312 on the outer peripheral wall of the connecting seat 31 with the internal thread on the inner peripheral wall of the connecting groove 11. When using a threaded connection, during assembly, the connecting seat 31 is rotated to engage the threads until the connecting seat 31 abuts against the first contact member 2; during disassembly, it can be removed by rotating it in the opposite direction.

[0058] It should be noted that this embodiment provides two reliable detachable connection methods: a snap-fit ​​connection enables quick assembly and replacement of the second contact 3, improving maintenance efficiency, while a threaded connection enhances the stability of the connection and prevents loosening during use. Both methods ensure that the electric arc is concentrated on the second contact 3, and facilitate quick replacement of the second contact 3 if it is damaged by arc erosion. In other embodiments, the detachable connection methods include, but are not limited to, the optional implementation methods described above, and are not specifically limited here.

[0059] In one embodiment, an insulating layer (not shown) is coated on the base 1 at the connection point between the first contact 2 and the second contact 3, and the insulating layer completely covers the surface of the base 1 at the connection point.

[0060] Specifically, the insulation layer enhances the insulation performance of the connection points, preventing electric arcs generated during live insertion and removal from penetrating the base 1 or spreading into its interior, thus avoiding safety hazards such as leakage and short circuits, while also protecting the base 1 from arc damage. When an arc is generated during the insertion or removal of the charging gun plug, the insulation layer prevents the arc from spreading to the base 1 and the area of ​​the first contact 2, confining the arc to the outside of the second contact 3 and within the insertion slot 33, effectively protecting the safety of the first contact 2 and the base 1, while also ensuring the safety of operators and equipment. It is understood that the insulation layer can be made of high-temperature resistant and arc-resistant insulating coating, or an insulating patch can be used instead of coating; both methods can achieve insulation protection of the connection points, and no specific limitation is made here.

[0061] In summary, the complete working process of a quick-change terminal in this embodiment is as follows:

[0062] During the charging connection phase, the charging gun plug is inserted into the insertion slot 33 of the second contact 3. The plug first contacts the elastic part 32, pushing the spring piece 321 to expand outward and compress the elastic locking part 323. The plug continues to be inserted and passes through the insertion slot 33 in the connector 31, eventually forming a connection with the conductive slot 21 of the first contact 2. At this time, the main current is stably transmitted through the charging gun plug, the second contact 3, and the first contact 2. The electric arc generated during the insertion and removal process is concentrated between the elastic part 32 and the plug. The heat of the electric arc is quickly dissipated through the heat-conducting layer on the inner wall of the second contact 3, while the insulating layer on the base 1 prevents the electric arc from spreading inward.

[0063] During the disconnection phase, the charging gun plug is pulled outward. The plug first disconnects from the first contact 2 and then moves outward along the insertion groove 33 under the reset action of the elastic locking member 323. Finally, it completely separates from the elastic part 32. The electric arc during the entire disconnection process is still concentrated between the elastic part 32 and the plug.

[0064] When the performance of the second contact 3 deteriorates or is damaged due to long-term arc erosion, there is no need to replace the entire quick-change terminal. Simply remove the second contact 3 from the base 1 by means of snap-fit ​​or threaded connection and replace it with a new second contact 3 to complete the maintenance, ensuring the long-term reliable use of the quick-change terminal under frequent plugging and unplugging conditions.

[0065] The present invention also proposes a socket that integrates the aforementioned quick-change terminal. It is understood that the base 1 of the quick-change terminal is fixedly installed inside the socket housing, and the insertion slot 33 of the second contact 3 of the quick-change terminal is positioned corresponding to the socket's socket hole, allowing the charging gun plug to be directly inserted into the insertion slot 33 of the quick-change terminal through the socket hole, achieving electrical connection with the quick-change terminal. This enables the socket to effectively protect internal conductive components, extend service life, reduce maintenance costs, and ensure the efficiency and safety of the charging process under conditions of frequent plugging and unplugging and high-current charging.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A quick-change terminal, characterized in that, It includes a base, a first contact element and a second contact element, wherein the first contact element is disposed in the base and the second contact element is detachably connected to the base; The second contact has a slot that connects to the base, and one end of the second contact near the base abuts against the first contact.

2. The quick-change terminal according to claim 1, characterized in that, The second contact includes a connecting seat and an elastic part. The elastic part is disposed at one end of the connecting seat away from the base. A portion of the insertion groove is provided in the elastic part, and the other portion of the insertion groove is provided in the connecting seat.

3. The quick-change terminal according to claim 2, characterized in that, The elastic part includes at least two spring pieces, which together form part of the insertion groove, and a spacer groove is provided between two adjacent spring pieces.

4. The quick-change terminal according to claim 2, characterized in that, The elastic part is provided with an elastic locking member, which is sleeved on the outer peripheral wall of the elastic part.

5. The quick-change terminal according to claim 2, characterized in that, The base is provided with an electrical cavity, which is connected to the insertion slot. The electrical cavity includes a connecting slot and a receiving slot in sequence along the direction from the second contact to the base. The inner diameter of the connecting slot is larger than the inner diameter of the receiving slot. The outer peripheral wall of the connecting seat is detachably connected to the inner peripheral wall of the connecting slot. The first contact is disposed in the receiving slot, and the connecting seat abuts against the first contact.

6. The quick-change terminal according to claim 5, characterized in that, The first contact element includes a wire body, which is a spiral wire body and is elastic; the spiral wire body surrounds a through groove for communicating with the insertion groove, and the outer peripheral wall of the through groove abuts against the inner peripheral wall of the receiving groove; the inner peripheral wall of the through groove is smaller than the inner peripheral wall of the insertion groove, so that the connecting seat abuts against the first contact element.

7. The quick-change terminal according to claim 5, characterized in that, The connection between the connector and the connecting groove is a snap-fit ​​connection, or the connection between the connector and the connecting groove is a threaded connection.

8. The quick-change terminal according to claim 1, characterized in that, An insulating layer is coated on the base corresponding to the connection between the first contact and the second contact.

9. The quick-change terminal according to claim 1, characterized in that, The inner wall surface of the second contact element is provided with a heat-conducting layer.

10. A socket, characterized in that, Includes the quick-change terminal as described in any one of claims 1-9.

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