Charging terminal with split groove structure and socket

Abstract

The utility model relates to a charging terminal with a split groove structure, which comprises a plurality of contact elastic sheets and a connecting seat, and is characterized in that the plurality of contact elastic sheets are arranged at one end of the connecting seat at intervals along the circumferential direction of the axis of the charging terminal with the split groove structure to form an insertion space for a male terminal to be inserted, each of the plurality of contact elastic sheets comprises a contact part, a closing-up part and a connecting part which are arranged in sequence, the connecting part is positioned at one end close to the connecting seat, and the closing-up part is arc-shaped and is used for driving the contact part to be close to the direction of the male terminal when the male terminal is inserted. According to the charging terminal with the split groove structure and the socket, the conditions that residual stress is generated due to bottom extrusion deformation of the contact elastic sheet and the contact elastic sheet is easy to rebound after extrusion are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of new energy vehicle charging, specifically relating to a slotted structure charging terminal and socket. Background Technology

[0002] Slotted terminals, due to their simple structure, low contact resistance, and strong current carrying capacity, have found some applications in sockets for new energy vehicles.

[0003] The existing slotted charging terminal is constructed by squeezing each contact spring at the bottom of the slot after the slot is made, causing it to deform towards the axis of the terminal, thus forming a cone shape with a small head and a large tail. After the male terminal is inserted from the head of the slotted charging terminal, the contact springs on the slotted charging terminal expand outward, forming a positive contact pressure on the male terminal.

[0004] However, because the above structure deforms the contact spring by external compression, residual stress remains on the contact spring far from the root of the broken connection. This can easily cause the contact spring to spring back, resulting in loss of terminal insertion and extraction force, thus losing current transmission function or causing poor contact. Furthermore, the external compression method makes it difficult to ensure dimensional consistency of the slotted charging terminal after closing, leading to large fluctuations in insertion and extraction force and a high failure rate. Utility Model Content

[0005] In view of the defects existing in the prior art, the purpose of this utility model is to provide a slotted charging terminal and socket to solve the problem of easy rebound of the contact spring.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a slotted charging terminal, comprising multiple contact springs and a connecting base. The multiple contact springs are circumferentially spaced along the axis of the slotted charging terminal at one end of the connecting base, forming an insertion space for inserting a male terminal. Each of the multiple contact springs includes a contact portion, a closing portion, and a connecting portion arranged sequentially. The connecting portion is located near the end of the connecting base, and the closing portion is arc-shaped, used to drive the contact portion toward the male terminal when the male terminal is inserted.

[0007] Optionally, the length of the contact portion and the closing portion along the axial direction of the charging terminal of the slotted structure is less than 10mm.

[0008] Optionally, the insertion space is circular.

[0009] Optionally, the number of contact springs is four, and the four contact springs are arranged around the axis of the slotted structure charging terminal, with equal spacing between adjacent contact springs.

[0010] Optionally, the spacing between the plurality of contact springs gradually increases along the insertion direction of the male terminal.

[0011] Optionally, the end of the connector away from the contact spring is provided with a crimping member, and the crimping member is provided with a wire crimping hole, through which the wire core can pass to form an electrical connection with the contact part.

[0012] Optionally, the connecting seat is provided with a limiting groove and a sealing groove, wherein the limiting groove is located between the pressing member and the sealing groove.

[0013] Another aspect of this utility model is a socket, including a slotted charging terminal and a socket housing, wherein the slotted charging terminal is inserted into the socket housing.

[0014] Optionally, the socket includes a limiting member, and the connector is provided with a limiting groove. The limiting member cooperates with the limiting groove to limit the displacement of the slotted charging terminal within the socket housing.

[0015] Optionally, the connector is provided with a sealing groove, and a sealing ring is provided in the sealing groove. The sealing ring is used to achieve a seal between the connector and the socket housing.

[0016] The advantage of this invention is that by deforming only at the closing part and not at the connecting part at the bottom, residual stress is avoided at the bottom of the contact spring, making it less likely to cause rebound. Attached Figure Description

[0017] Figure 1 A schematic diagram of a slotted charging terminal provided by this utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0019] Figure 3 This is a schematic diagram showing the connection relationship between the charging terminal and the male terminal of the slotted structure.

[0020] Figure 4 A cross-sectional structural diagram of a socket provided by this utility model;

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Slotted charging terminal; 11. Contact spring; 12. Connecting seat; 111. Contact part; 112. Closing part; 113. Connecting part; 121. Sealing groove; 122. Limiting groove; 123. Crimping component; 101. Insertion space; 102. Slotted;

[0023] 2. Socket; 21. Socket housing; 22. Limiting component. Detailed Implementation

[0024] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] like Figure 1-3 As shown, the present invention provides a slotted charging terminal 1, which includes multiple contact springs 11 and a connecting seat 12. The multiple contact springs 11 are circumferentially spaced at one end of the connecting seat 12 along the axis of the slotted charging terminal 1, forming a plugging space 101 for inserting a male terminal. Each of the multiple contact springs 11 includes a contact portion 111, a closing portion 112 and a connecting portion 113 arranged sequentially. The connecting portion 113 is located at one end close to the connecting seat 12, and the closing portion 112 is arc-shaped, which is used to drive the contact portion 111 to move towards the male terminal when the male terminal is inserted.

[0026] In this embodiment, when the male terminal is inserted into the insertion space 101, the contact portion 111 is stretched open, and the closing portion 112 undergoes elastic deformation. Under the action of elastic force, the stretched contact portion 111 is pulled towards the male terminal, causing the contact portion 111 to come into contact with the male terminal. Thus, the elastic deformation only occurs in the closing portion 112 and the contact portion 111 located at the head, while the connecting portion 113 located at the bottom of the slotted structure charging terminal 1 does not undergo axial deformation, that is, there is no residual stress at the bottom, thereby achieving an anti-rebound effect.

[0027] It should be noted that the contact spring 11 and the connecting seat 12 can be integrally formed or separately set. When the contact spring 11 and the connecting seat 12 are integrally formed, the spacing between the multiple contact springs 11 is a slot 102. When the contact spring 11 and the connecting seat 12 are set separately, the connecting part 113 is fixedly connected to one end of the connecting seat 12.

[0028] Preferably, the contact spring 11 and the connecting seat 12 are integrally formed, that is, the slotted structure charging terminal 1 is a whole, and the slot 102 is formed by cutting and slotting on the slotted structure charging terminal 1.

[0029] In one embodiment, the length of the contact portion 111 and the closing portion 112 along the axial direction of the slotted structure charging terminal 1 is less than 10 mm.

[0030] It should be noted that by limiting the length of the contact portion 111 and the closing portion 112 to less than 10mm, the contact spring 11 deforms only within a 10mm range at the head after being inserted into the male terminal, thus achieving better anti-rebound effect.

[0031] In one embodiment, the insertion space 101 is circular.

[0032] It should be noted that in this embodiment, the insertion space 101 formed by the spaced contact springs 11 is circular, and the size of the contact portion 111 near the contact point is about 0.5 mm smaller than the diameter of the male terminal. Thus, when the male terminal is inserted into the insertion space 101, the contact portion 111 is opened, and the contact between the male terminal and the contact portion 111 is an arc-shaped line contact. Simultaneously, the contact portion 111 exerts a positive pressure on the male terminal under the elastic deformation force, ensuring stable contact between the male terminal and the contact area of ​​the contact portion 111, thus transmitting electrical energy.

[0033] In other embodiments, the insertion space can be of any shape, such as square, as long as the male terminal can be inserted into the insertion space and the contact portion 111 can contact the male terminal under the elastic force of elastic deformation after insertion.

[0034] In one embodiment, there are four contact springs 11, which surround the axis of the slotted charging terminal 1, and the spacing between two adjacent contact springs 11 is equal.

[0035] It should be noted that the number of contact springs 11 can be greater or less than four. The specific number can be set according to the charging requirements of the slotted structure charging terminal 1, as long as the slotted structure charging terminal 1 can be connected to the male terminal to achieve the charging function.

[0036] In one embodiment, the spacing between the plurality of contact springs 11 gradually increases along the insertion direction of the male terminal.

[0037] It should be noted that the insertion direction of the male terminal is along the axis of the slotted structure charging terminal 1, from the contact portion 111 to the connecting portion 113. In this direction, the spacing between the multiple contact springs 11 increases from small to large.

[0038] In one embodiment, a crimping member 123 is provided at the end of the connector 12 away from the contact spring 11. The crimping member 123 is provided with a wire crimping hole, through which the wire core can pass to form an electrical connection with the contact portion 111.

[0039] It should be noted that the wire core passes through the crimping hole to form an electrical connection with the vehicle and the contact spring 11 respectively, so as to realize the charging function of the slotted structure charging terminal 1. At the same time, after the wire core passes through the crimping hole, it squeezes the outside of the crimping member 123, which can make the terminal and the cable tightly connected.

[0040] In one embodiment, the connecting seat 12 is further provided with a sealing groove 121 and a limiting groove 122, with the limiting groove 122 located between the crimping member 123 and the sealing groove 121.

[0041] Please see Figure 4 The present invention also provides a socket 2, including a slotted charging terminal 1 and a socket housing 21, wherein the slotted charging terminal 1 is inserted into the socket housing 21.

[0042] It should be noted that socket 2 is connected to the vehicle.

[0043] In one embodiment, the socket 2 further includes a limiting member 22, and a limiting groove 122 is provided on the connecting seat 12. The limiting member 22 and the limiting groove 122 are mutually limiting and cooperating to restrict the movement of the slotted structure charging terminal 1 within the socket housing 21.

[0044] It should be noted that when the male terminal of the charging gun is inserted into or pulled out of the insertion space 101, insertion / pulling force will be generated, and the slotted charging terminal 1 may be displaced in the direction of the force. At this time, the movement of the slotted charging terminal 1 relative to the socket housing 21 can be restricted by the limiting cooperation between the limiting member 22 and the limiting groove 122.

[0045] In one embodiment, a sealing groove 121 is provided on the connector 12, and a sealing ring is provided in the sealing groove 121. The sealing ring is used to achieve a seal between the connector 12 and the socket housing 21.

[0046] It should be noted that by setting a sealing groove 121 and configuring a sealing ring in the sealing groove 121, after the sealing ring is installed in the sealing groove 121, when the charging terminal 1 of the slotted structure is inserted into the socket housing 21 at the set position, the outer side of the sealing ring contacts the socket housing 21. At this time, the sealing ring is deformed by pressure, generating positive pressure that partially contacts the socket housing 21 and positive pressure that contacts the sealing groove 121, thereby achieving an IP67 waterproof rating.

[0047] The working principle of this utility model is as follows:

[0048] First, when charging the vehicle is required, the male terminal of the charging gun is inserted into the insertion space 101 from the contact portion 111 along the axis of the slotted structure charging terminal 1. At this time, the contact portion 111 is squeezed outward by the male terminal, and the closing portion 112 undergoes elastic deformation. Through elastic force, the contact portion 111 is pulled closer to the male terminal, thereby generating a positive pressure between the contact portion 111 and the male terminal, thus forming a stable contact between the contact portion 111 and the male terminal, and realizing the transmission of electrical energy. Similarly, after charging is completed, the charging gun can be pulled out to remove its male terminal from the insertion space.

[0049] As can be seen from the above embodiments, this utility model avoids residual stress at the bottom of the contact spring by deforming only at the constricted part and not at the connecting part at the bottom, thus making it less prone to rebound.

[0050] Meanwhile, defining the resulting insertion space as a circle can effectively ensure dimensional consistency.

[0051] Furthermore, in this invention, the contact between the male terminal and the insertion space is an arc-shaped contact, which, compared to the traditional point contact, has the effect of more contact points, lower contact resistance, and more stable contact.

[0052] Based on the above-mentioned insertion method, the insertion and extraction force required during the insertion and extraction process of this utility model is small, the feel is smooth, and wear during the insertion and extraction process can be reduced.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A split-slot structure charging terminal, characterized by, The application relates to a split-slot structure charging terminal, which comprises a plurality of contact springs and a connecting seat, the plurality of contact springs are arranged at one end of the connecting seat along the split-slot structure charging terminal axis in a circumferential interval, and an insertion space for a male terminal is formed, wherein the plurality of contact springs each comprise a contact part, a closing part and a connecting part arranged in sequence, the connecting part is located at one end close to the connecting seat, and the closing part is arc-shaped and used for leading the contact part to close to the male terminal when the male terminal is inserted.

2. The split-slot structure charging terminal according to claim 1, wherein: the length of the contact part and the closing part along the split-slot structure charging terminal axis is less than 10 mm.

3. The split-slot structure charging terminal according to claim 1, wherein: the insertion space is circular.

4. The split-slot structure charging terminal according to claim 1, wherein: the number of the contact springs is four, the four contact springs are arranged around the split-slot structure charging terminal axis, and the interval between two adjacent contact springs is equal.

5. The split-slot structure charging terminal according to claim 1, wherein: the interval between the plurality of contact springs gradually increases along the insertion direction of the male terminal.

6. The split-slot structure charging terminal according to claim 1, wherein: the connecting seat is provided with a pressure connecting piece at one end away from the contact spring, the pressure connecting piece is provided with a wire pressure hole, and a wire core can pass through the wire pressure hole to form an electrical connection with the contact part.

7. The split-slot structure charging terminal according to claim 6, wherein: the connecting seat is provided with a limiting groove and a sealing groove, and the limiting groove is located between the pressure connecting piece and the sealing groove. The application also relates to a socket shell and the split-slot structure charging terminal according to any one of claims 1 to 7, and the split-slot structure charging terminal is inserted into the socket shell. The socket comprises a limiting piece, the connecting seat is provided with a limiting groove, the limiting piece is limitedly matched with the limiting groove, and the split-slot structure charging terminal is limitedly displaced in the socket shell.

10. The socket according to claim 8, wherein: the connecting seat is provided with a sealing groove, the sealing groove is provided with a sealing ring, and the sealing ring is used for sealing between the connecting seat and the socket shell. ​ ​ ​ ​ 8. A socket, characterized by ​ 9. A socket according to claim 8, wherein : ​ ​ ​

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