Connection structure, charging receptacle, and electric transmission structure

Abstract

A connection structure, relating to the technical field of electric vehicle charging devices, and comprising: a connecting end used for connecting a cable; a cylindrical terminal having one end connected to the connecting end and the other end provided with insertion elastic sheets, slots being formed between the insertion elastic sheets; and an elastic sleeve at least sleeved on the periphery of the insertion elastic sheets and covering the slots, the inner wall of the elastic sleeve being provided with protruding ribs suitable for being clamped in the slots.

Description

A connection structure, a charging base and an electric transmission structure

[0001] Related applications

[0002] This application claims priority to the Chinese invention patent application with application number 202410312837.3 filed on March 19, 2024, and cites the entire disclosure of the above patent application as part of this application. Technical Field

[0003] The present application relates to the technical field of electric vehicle charging equipment, and in particular to a connection structure, a charging seat and an electric transmission structure. Background Art

[0004] In electrical connections, wiring harnesses are often used to conduct current, and the terminals of the wiring harnesses are equipped with plug-in terminals for connecting to corresponding wires. Plug-in terminals can be divided into matching barrel terminals and columnar terminals. The barrel terminal is provided with a plug-in spring, which must provide sufficient clamping force to the columnar terminal after plugging. If the clamping force is insufficient, the resistance at the contact point between the barrel terminal and the columnar terminal will increase. At this time, not only will the efficiency of electrical transmission be greatly reduced, but high temperatures that cause combustion will be generated at the terminal contact position, eventually causing the entire device to catch fire. In addition, there are slots between the plug-in springs. In actual applications, liquids or dust can easily enter the plug-in cavity through the slots, eventually leading to corrosion of the terminals. Therefore, a new solution is urgently needed in the prior art to solve the above problems. Summary of the Invention

[0005] One object of the present application is to provide a connection structure comprising:

[0006] Connecting end, used for connecting cables;

[0007] A barrel terminal, one end of which is connected to the connection end, and the other end of which has an inserting spring sheet, and a slot is formed between the inserting spring sheets;

[0008] an elastic sleeve, at least sleeved around the outer periphery of the plug-in spring piece and covering the slot; and

[0009] The inner wall of the elastic sleeve is provided with a convex rib suitable for being clamped in the slot.

[0010] The elastic sleeve is a waterproof rubber sleeve.

[0011] The ratio of the thickness of the convex rib to the thickness of the plug-in spring piece is 1:1-1:1.6.

[0012] The ratio of the wall thickness of the elastic sleeve to the thickness of the plug-in spring piece is 1:0.3-1:1.2.

[0013] The first end of the connection end is connected to the cable by welding, screwing, crimping or clamping.

[0014] The second end of the connecting end is riveted to the barrel terminal.

[0015] The elastic sleeve wraps the connection between the barrel terminal and the connecting end.

[0016] The connecting end is integrally formed with the barrel terminal.

[0017] The plug-in elastic sheets surround a plug-in cavity, and the diameter of the plug-in cavity gradually decreases from the direction close to the connection end to the direction away from the connection end.

[0018] The side of the plug-in elastic piece facing the plug-in cavity is provided with a conductive wear-resistant layer.

[0019] One end of the plug-in elastic piece away from the connection end is bent outward to form an introduction curved surface.

[0020] The elastic sleeve is made of heat-conducting rubber.

[0021] The inner side wall of the elastic sleeve is wavy.

[0022] The present application also provides a charging stand, comprising a charging stand shell and the connection structure as described above, wherein the charging stand shell has a cavity, and the connection structure is arranged in the cavity.

[0023] There is a gap between the cavity and the barrel terminal, and the surface of the elastic sleeve has an elastic protrusion that abuts against the inner wall of the cavity.

[0024] There are multiple elastic protrusions, which are evenly distributed on the surface of the elastic sleeve.

[0025] The present application further provides an electrical transmission structure, comprising the connection structure and male terminal as described above, wherein the root of the male terminal is sleeved with an elastic base, and when the male terminal and the barrel terminal are in a plugged-in state, the elastic base abuts against and seals the elastic sleeve.

[0026] The beneficial effects of this application are as follows: the elastic sleeve is sleeved onto the barrel terminal. When the cylindrical terminal is inserted into the barrel terminal, the elastic sleeve can provide additional restraining force to cause the plug-in spring to squeeze the cylindrical terminal, thereby making the plug-in connection between the barrel terminal and the cylindrical terminal more secure. The inner wall of the elastic sleeve has ribs that fit into the slots between the plug-in springs, preventing the elastic sleeve from circumferentially shifting relative to the barrel terminal and preventing dust or water from entering the plug-in cavity through the slots. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a cross-sectional view of a connection structure according to an embodiment of the present application.

[0028] FIG2 is a side view of a connection structure according to an embodiment of the present application.

[0029] FIG3 is a schematic diagram of a barrel terminal of a connection structure according to an embodiment of the present application.

[0030] FIG4 is a cross-sectional view of a charging stand according to an embodiment of the present application.

[0031] FIG5 is a cross-sectional view of an electrical transmission structure according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] A connection structure, as shown in Figures 1 to 3, includes:

[0034] Connecting end 1, used for connecting cable 2;

[0035] The barrel terminal 3 has one end connected to the connection end 1 and the other end has an inserting spring 31 with a slot 32 between the inserting spring 31;

[0036] The elastic sleeve 4 is at least sleeved on the outer periphery of the plug-in spring piece 31 and covers the slot 32;

[0037] The inner wall of the elastic sleeve 4 is provided with a rib 41 suitable for being clamped in the slot 32 .

[0038] The first end 11 of the connecting end 1 is used to connect to the cable 2. The connection method can be that the first end 11 is connected to the cable 2 by welding, screwing, crimping or snapping. The barrel terminal 3 is connected to the connecting end 1, and the other end is a plug-in cavity. Part of the side wall of the plug-in cavity is a circumferentially closed structure, and part of the side wall is a plurality of plug-in springs 31. There are slots 32 between the plug-in springs 31. The plug-in springs 31 can apply a clamping force to the columnar terminal inserted into the barrel terminal 3 to prevent the barrel terminal 3 from separating from the columnar terminal. The elastic sleeve 4 is sleeved on the barrel terminal 3, at least partially sleeved on the plug-in springs 31. When the columnar terminal is plugged into the barrel terminal 3, the elastic sleeve 4 can provide additional restraining force to make the plug-in springs 31 squeeze the columnar terminal, thereby making the barrel terminal 3 and the columnar terminal more firmly plugged. The inner wall of the elastic sleeve 4 has ribs 41 that can be embedded in the slots 32 between the plug-in springs 31 , preventing the elastic sleeve 4 from circumferentially displacing relative to the barrel terminal 3 and preventing dust or water from entering the plug-in cavity through the slots 32 .

[0039] In some embodiments, the elastic sleeve 4 is a waterproof rubber sleeve. This waterproof rubber sleeve has high strength, good elasticity, and excellent waterproof performance, ensuring the elastic deformation and resilience of the plug-in spring 31 and the waterproof performance of the barrel terminal. Of course, the elastic sleeve 4 can also be made of other elastic materials, and this application does not impose specific limitations on this.

[0040] In some embodiments, the ratio of the thickness of the rib 41 to the thickness of the plug-in spring 31 is 1:1-1:1.6. When the thickness of the rib 41 exceeds the thickness of the plug-in spring 31, it means that the rib 41 will extend into the plug-in cavity, which will hinder the insertion of the columnar terminal into the barrel terminal 3. When the thickness of the rib 41 is too small relative to the thickness of the plug-in spring 31, the rib 41 will easily fall out of the slot 32 when the elastic sleeve 4 is circumferentially twisted, and will not play a role in dustproof and waterproofing. Therefore, the inventor exemplarily selected the ratio of the thickness of the rib 41 to the thickness of the plug-in spring 31 to be 1:1-1:1.6, so as to ensure that the columnar terminal is smoothly inserted into the barrel terminal, and when the elastic sleeve is circumferentially twisted, the rib is not easy to fall out of the slot, thereby ensuring that the elastic sleeve plays a role in dustproof and waterproofing.

[0041] In some embodiments, the ratio of the wall thickness of the elastic sleeve 4 to the thickness of the plug-in spring piece 31 is 1:0.3-1:1.2. If the thickness of the elastic sleeve 4 is too thick, the extrusion force applied to the plug-in spring piece 31 will be too large. During the insertion of the columnar terminal into the barrel terminal 3, the friction between the two terminals will be too large, causing scratches on the plating on the terminal surface, thereby increasing the resistance. If the thickness of the elastic sleeve 4 is too small, it will not be able to provide sufficient clamping force to the plug-in spring piece 31. Therefore, the inventors exemplarily select a ratio of the wall thickness of the elastic sleeve 4 to the thickness of the plug-in spring piece 31 of 1:0.3-1:1.2 to achieve smooth insertion of the columnar terminal into the barrel terminal without causing damage to other structures, and to ensure that the elastic sleeve provides the clamping force to the plug-in spring piece.

[0042] In some embodiments, the second end 12 of the connecting terminal 1 is riveted to the barrel terminal 3. As shown in FIG1 , the advantages of riveting are a firm connection, a simple processing method, and ease of operation.

[0043] In some embodiments, the elastic sleeve 4 wraps around the connection between the barrel terminal 3 and the connecting end 1. Because water easily enters the connection between the barrel terminal 3 and the connecting end 1, the elastic sleeve 4 is extended to also wrap around the connection between the barrel terminal 3 and the connecting end 1, thereby achieving dust and water resistance.

[0044] In some embodiments, the connecting end 1 and the barrel terminal 3 are integrally formed. The integrally formed design not only reduces installation steps and reduces costs, but more importantly, it also reduces connection points, reduces resistance, and increases electrical transmission efficiency.

[0045] In some embodiments, the plug-in springs 31 surround a plug-in cavity 33, whose diameter gradually decreases from the connector end 1 toward the connector end 1. The plug-in cavity 33 gradually converges from the connector end 1 toward the distal end, enabling the plug-in cavity 33 to provide greater clamping force on the cylindrical terminal. Specifically, the cylindrical terminal is plugged into the barrel terminal by inserting the cylindrical terminal into the barrel terminal 3 through the plug-in cavity 33.

[0046] In some embodiments, the plug-in spring piece 31 has a conductive wear-resistant layer on the side facing the plug-in cavity 33. The conductive wear-resistant layer can prevent the surface of the plug-in spring piece 31 from being worn, thereby extending the service life of the barrel terminal 3.

[0047] In some embodiments, the end of the plug spring 31 away from the connection end 1 is bent outward to form a guide curved surface. When the cylindrical terminal is inserted into the plug cavity 33, the guide curved surface can guide the cylindrical terminal into the plug cavity 33, reducing collisions between the cylindrical terminal and the plug spring 31, and preventing scratches on the coatings on both surfaces that would increase resistance.

[0048] In some embodiments, the elastic sleeve 4 is made of thermally conductive rubber. If the connection structure is used for high current transmission, the elastic sleeve 4 made of thermally conductive rubber can be used to quickly dissipate the heat generated by the barrel terminal 3 to prevent the temperature from being too high and causing an increase in resistance.

[0049] In some embodiments, the inner wall of the elastic sleeve 4 is wavy. As shown in FIG3 , the wavy inner wall of the elastic sleeve 4 means that the elastic sleeve 4 partially contacts the cylindrical terminal 3. When the cylindrical terminal is inserted into the insertion cavity 33, the elastic sleeve 4 has more room to deform without increasing the outer diameter of the elastic sleeve 4, thereby being suitable for a variety of assembly environments.

[0050] This application also provides a charging station, as shown in FIG4 , comprising a charging station housing 6 and the connection structure described above. The charging station housing 6 has a cavity 61, and the connection structure is disposed within the cavity 61. A cylindrical terminal is disposed within the charging gun. When the charging gun is plugged into the charging station housing 6 for charging, the cylindrical terminal is inserted into the cylindrical terminal 3, and the elastic sleeve 4 squeezes the cylindrical terminal 3 to clamp the cylindrical terminal to achieve current transmission. The structures of the other parts of the charging station are described in detail in the prior art and will not be elaborated herein.

[0051] In some embodiments, there is a gap between the cavity 61 and the barrel terminal 3, and the surface of the elastic sleeve 4 has elastic protrusions that abut the inner wall of the cavity 61. The elastic protrusions enable the elastic sleeve 4 to abut against the cavity 61 and prevent shaking. The gap between the elastic protrusions also provides space for the elastic sleeve 4 to deform.

[0052] In some embodiments, there are multiple elastic protrusions that are evenly distributed on the surface of the elastic sleeve 4. The evenly distributed elastic protrusions can evenly force the elastic sleeve 4 and the inner wall of the cavity 61, making the installation of the elastic sleeve 4 more stable.

[0053] The present application also provides an electrical transmission structure, as shown in FIG5 , comprising the connection structure described above and a male terminal 7. An elastic base 8 is sleeved on the root of the male terminal 7. When the male terminal 7 and the barrel terminal 3 are in the plugged state, the elastic base 8 abuts against and seals the elastic sleeve 4. In the electrical transmission structure provided by the present application, the male terminal 7 is a columnar terminal, and the elastic base 8 abuts against the elastic sleeve, providing a better seal and preventing water or dust from entering the plug-in cavity 33 between the two terminals.

[0054] In the description of the application documents of this application, it should be understood that the directions or relationships indicated by the terms "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplified description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application.

[0055] The above is a detailed introduction to the charging gun and its gun head connection terminal provided by this application. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A connection structure, characterized in that: include: Connecting end, used for connecting cables; A barrel terminal, one end of which is connected to the connection end, and the other end of which has an inserting spring sheet, and a slot is formed between the inserting spring sheets; an elastic sleeve, at least sleeved around the outer periphery of the plug-in spring piece and covering the slot; and The inner wall of the elastic sleeve is provided with a convex rib suitable for being clamped in the slot.

2. A connection structure according to claim 1, characterized in that: The elastic sleeve is a waterproof rubber sleeve.

3. A connection structure according to claim 1, characterized in that: The ratio of the thickness of the convex rib to the thickness of the plug-in spring piece is 1:1-1:1.

6.

4. A connection structure according to claim 1, characterized in that: The ratio of the wall thickness of the elastic sleeve to the thickness of the plug-in spring piece is 1:0.3-1:1.

2.

5. A connection structure according to claim 1, characterized in that: The first end of the connection end is connected to the cable by welding, screwing, crimping or clamping.

6. A connection structure according to claim 1, characterized in that: The second end of the connecting end is riveted to the barrel terminal.

7. A connection structure according to claim 1, characterized in that: The elastic sleeve wraps the connection between the barrel terminal and the connecting end.

8. A connection structure according to claim 1, characterized in that: The connecting end is integrally formed with the barrel terminal.

9. The connection structure according to claim 1, characterized in that: The plug-in elastic sheets surround a plug-in cavity, and the diameter of the plug-in cavity gradually decreases from the direction close to the connection end to the direction away from the connection end.

10. A connection structure according to claim 9, characterized in that: The side of the plug-in elastic piece facing the plug-in cavity is provided with a conductive wear-resistant layer.

11. A connection structure according to claim 1, characterized in that: One end of the plug-in elastic piece away from the connection end is bent outward to form an introduction curved surface.

12. A connection structure according to claim 1, characterized in that: The elastic sleeve is made of heat-conducting rubber.

13. The connection structure according to claim 1, characterized in that: The inner side wall of the elastic sleeve is wavy.

14. A charging stand, characterized in that: It comprises a charging base shell and a connecting structure as described in any one of claims 1 to 13, wherein the charging base shell has a cavity, and the connecting structure is arranged in the cavity.

15. The charging stand according to claim 14, characterized in that: There is a gap between the cavity and the barrel terminal, and the surface of the elastic sleeve has an elastic protrusion that abuts against the inner wall of the cavity.

16. The charging stand according to claim 15, characterized in that: There are multiple elastic protrusions, which are evenly distributed on the surface of the elastic sleeve.

17. An electrical transmission structure, characterized in that: It comprises the connection structure and male terminal according to any one of claims 1 to 13, wherein the root of the male terminal is sleeved with an elastic base, and when the male terminal and the barrel terminal are in a plugged-in state, the elastic base abuts against and seals the elastic sleeve.

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