Adapter

Abstract

The utility model discloses a crossover coupling which comprises a shell and an insertion core assembly fixedly arranged in the shell, the shell comprises a first cavity and a second cavity which are integrally formed, the interior of the first cavity is hollow, the diameter of the first cavity is larger than that of the second cavity, and a limiting plate face is formed at the connecting position of the first cavity and the second cavity; the insertion core assembly comprises an insertion core shell and a group of connecting terminals, the inner end surface of the insertion core shell is provided with a limiting convex part used for limiting the butt joint position of the group of connecting terminals, the limiting plate surface is correspondingly provided with a limiting concave part, the inner end surface of the insertion core shell is fixedly connected with the front end surface of the limiting plate surface, and the limiting concave part is fixedly connected with the front end surface of the insertion core shell. And the limiting convex part is clamped in the limiting concave part. According to the utility model, whether the installation stability of the connection terminal group is qualified or not is detected in the assembly stage, and then the insertion core assembly is embedded in the shell as a whole, so that the assembly stability is ensured, and meanwhile, the assembly is maximally simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of conversion joints, in particular to a conversion joint. Background Art

[0002] The North American Charging Standard, referred to as NACS (North American Charging Standard), was originally a charging specification unique to Tesla electric vehicles, formerly known as TPC. With the gradual release of NACS charging stations, electric vehicles other than Tesla can also use NACS charging stations for charging. However, electric vehicles from other companies mostly use SAE charging guns, which are not compatible with the charging end of the NACS charging station, making charging difficult. Therefore, a conversion connector that can connect the two is needed.

[0003] On the other hand, the stability of the internal components of the conversion connector plays a decisive role in the stability of the charging connection and directly affects the charging efficiency. However, the connection terminal components are all built into the shell, and the shell is usually closed after the connection terminal is installed in the shell. This makes it difficult to detect the installation stability of the connection terminal after it is installed in the shell, making the stability of the connection terminal components uncertain. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a conversion joint.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A conversion connector comprises a shell and a plug assembly fixed therein, the shell comprising an integrally formed first chamber and a second chamber, the first chamber is hollow inside and has a diameter larger than that of the second chamber, and a limit plate surface is formed at the connection between the two; the plug assembly comprises a plug shell and a group of connecting terminal groups, the plug shell is built into the first chamber, and an annular interval is formed between the two, a group of connecting terminal groups is formed by a group of connecting terminals for connecting to a NACS charging seat and a group of connecting terminals for connecting to a SAE charging gun, and a limit plate surface is provided on the inner end surface of the plug shell A group of limiting protrusions at the docking point of the connecting terminal group is determined, and a limiting recess is correspondingly arranged on the limiting plate surface. The inner end surface of the plug shell is fixedly connected to the front end surface of the limiting plate surface, and the limiting protrusion is clamped in the limiting recess. A group of connecting terminals for connecting to the NACS charging seat is passed through the plug shell, and the port of the first chamber forms a first connecting end that can be connected to the NACS charging seat; a group of connecting terminals for connecting to the SAE charging gun is passed through the second chamber, and the port of the second chamber forms a second connecting end that can be connected to the SAE charging gun.

[0007] Preferably, a welding groove is provided on the outer edge of the limiting plate surface, and a fusion rib matching the groove is convexly provided on the inner end surface of the insert shell. The fusion rib and the welding groove are welded into one by ultrasonic welding to seal the connection between the insert shell and the limiting plate surface.

[0008] Preferably, a circular groove is provided on the outer edge of the limiting plate surface, a group of L-shaped grooves are evenly distributed on the side of the circular groove, and a first sealing ring is embedded in the circular groove, and a group of card blocks matching the L-shaped groove are provided on the outer wall of the inner end surface of the plug shell, the card blocks are vertically inserted into the L-shaped groove and connected with the L-shaped groove by rotation, and the first sealing ring seals the connection between the plug shell and the limiting plate surface.

[0009] Preferably, five interconnected accommodating cavities are formed between the plug shell and the second chamber for accommodating a group of the connecting terminal groups, wherein one group of the connecting terminal groups includes two groups of power terminal groups, two groups of signal terminal groups and one PE connecting terminal group, the two groups of the power terminal groups are located above the two groups of the signal terminal groups, and the two groups of the power terminal groups and the two groups of the signal terminal groups are symmetrically arranged, and the PE connecting terminal group is located below between the two groups of the signal terminal groups.

[0010] Preferably, each group of the power terminal groups is formed by riveting an SAE power terminal and a NACS power terminal relative to each other, a first limiting protrusion is arranged on the inner end surface of the plug shell, the docking point between the SAE power terminal and the NACS power terminal is fixed in the first limiting protrusion, and a second sealing ring and a third sealing ring for sealing the accommodating cavity are respectively embedded on the outer walls of the SAE power terminal and the NACS power terminal.

[0011] Preferably, each group of the signal terminal groups is formed by a SAE signal terminal and a NACS signal terminal fixedly connected by a connecting ring, the ends of the SAE signal terminal and the ends of the NACS signal terminal are arranged opposite to each other and are riveted to the two ends of the connecting ring respectively, and a second limiting protrusion for clamping the connecting ring is provided on the inner end surface of the plug shell, and the outer walls of the SAE signal terminal and the NACS signal terminal are respectively embedded with a fourth sealing ring and a fifth sealing ring for sealing the accommodating cavity.

[0012] Preferably, each of the second limiting protrusions is composed of two protrusions fixedly arranged on the inner end surface of the insert housing, the spacing between the two protrusions matches the width of the connecting ring, and a trumpet-shaped opening is formed between the ends of the two protrusions.

[0013] Preferably, a third limiting protrusion is provided on the inner end surface of the plug shell, the PE connection terminal group is formed by docking the first PE connection terminal and the second PE connection terminal, and the connection between the first PE connection terminal and the second PE connection terminal is fixed in the third limiting protrusion, and the outer walls of the first PE connection terminal and the second PE connection terminal are also respectively embedded with a sixth sealing ring and a seventh sealing ring for sealing the accommodating cavity.

[0014] Preferably, the two first limiting protrusions, the two second limiting protrusions and the third limiting protrusion together constitute the limiting protrusion, the limiting recess has two first limiting recesses, two second limiting recesses and a third limiting recess that are correspondingly arranged, and the connecting ring is relatively inclined, and a notch is arranged on the outer side wall of the first limiting recess, and the end of the connecting ring is clamped in the notch.

[0015] Preferably, a clamping block is integrally formed on the top of the outer wall of the first chamber, and a clamping groove is provided on the other side opposite to the clamping block.

[0016] The beneficial effects of the utility model are mainly reflected in:

[0017] 1. It is composed of a fixed connection between a shell and a plug assembly. The shell is made of integral injection molding, which can ensure the integrity and strength of the shell itself and avoid the connection instability caused by the assembly of multiple shells. The plug assembly is made of a fixed connection between a plug shell and a connection terminal group. The plug shell is an integral injection molding part. During the assembly stage, the butt joint of the connection terminal group is first fixed to the plug shell, so that during the assembly stage, it can be detected whether the stability of the connection terminal group installation meets the requirements, and then the plug assembly is embedded in the shell as a whole to ensure the assembly stability while maximizing the ease of assembly;

[0018] 2. Ultrasonic welding is used between the inner end surface of the plug shell and the limit plate surface, and a welding groove and a matching fusion rib are set on the limit plate surface to form a welding area between the two. After ultrasonic welding, the integrity between the shell and the plug shell is stronger, making the connection between the two more stable, and the protection level of the connection can reach IP67 level, which is not easily affected by the external environment;

[0019] 3. The limiting protrusion formed on the inner end surface of the plug shell and the limiting recess formed on the limiting plate surface are snapped together, which can further enhance the connection stability between the plug shell and the shell. At the same time, the outside of the connecting ring is snapped together with the notch on the first limiting recess, which can further enhance the installation stability of the internal connecting terminal group, making it less likely to loosen, thereby ensuring the connection stability and charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 : A schematic diagram of an embodiment of the utility model;

[0022] Figure 2 : An exploded schematic diagram of an embodiment of the utility model;

[0023] Figure 3 : A cross-sectional view of an embodiment of the utility model;

[0024] Figure 4 : A schematic diagram of the insert housing in the embodiment of the utility model;

[0025] Figure 5 : A schematic diagram of a limiting plate surface in an embodiment of the present utility model. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0027] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0028] like Figures 1 to 5As shown, the utility model discloses a conversion connector, including a shell 1 and a plug assembly fixed therein, the shell 1 includes an integrally formed first chamber 101 and a second chamber 102, the first chamber 101 is hollow inside, and its diameter is larger than the second chamber 102, and a limit plate surface 103 is formed at the connection between the two; the plug assembly includes a plug shell 2 and a group of connecting terminal groups, the plug shell 2 is built into the first chamber 101, and an annular interval 100 is formed between the two, and a group of connecting terminal groups is formed by a group of connecting terminals for connecting to a NACS charging seat and a group of connecting terminals for connecting to a SAE charging gun, and the plug shell 2 A limiting protrusion is provided on the inner end surface for limiting the docking point of a group of the connecting terminal groups, and a limiting recess is correspondingly provided on the limiting plate surface 103. The inner end surface of the plug shell 2 is fixedly connected to the front end surface of the limiting plate surface 103, and the limiting protrusion is clamped in the limiting recess. A group of connecting terminals for connecting to the NACS charging seat are passed through the plug shell 2, and the port of the first chamber 101 forms a first connecting end that can be communicated with the NACS charging seat; a group of connecting terminals for connecting to the SAE charging gun are passed through the second chamber 102, and the port of the second chamber 102 forms a second connecting end that can be communicated with the SAE charging gun.

[0029] The utility model is composed of a housing 1 and a plug assembly fixedly connected. The housing 1 is formed by integral injection molding, which can ensure the integrity and strength of the housing 1 itself and avoid the connection instability caused by the assembly of multiple housings. The plug assembly is formed by the plug housing 2 and a group of connecting terminal groups fixedly connected. The plug housing 2 is an integral injection molding part, which makes it have integrity. At the same time, during the assembly stage, the butt joint of a group of connecting terminal groups can be fixed to the inner end surface of the plug housing 2. In this way, during the assembly stage, it is possible to detect whether the stability of the installation of a group of connecting terminal groups meets the requirements, and then the plug assembly is embedded in the interior of the housing 1 as a whole to ensure the stability of the assembly while maximizing the ease of assembly.

[0030] Specifically, Figure 3 and Figure 5 As shown, a welding groove 1031 is formed on the outer edge of the limiting plate surface 103, and a fusion rib 201 matching the groove 1031 is convexly provided on the inner end surface of the insert core housing 2, and the fusion rib 201 and the welding groove 1031 are integrated by ultrasonic welding to seal the connection between the insert core housing 2 and the limiting plate surface 103.

[0031] In a preferred embodiment, the inner end surface of the ferrule housing 2 and the limit plate surface 103 are fixed by ultrasonic welding, and a welding area is formed between the welding groove 1031 and the matching fusion rib 201. After ultrasonic welding, the connection between the housing 1 and the ferrule housing 2 is more integrated, making the connection between the two more stable, and the protection level of the connection between the two can reach IP67 level, which is not easily affected by the external environment. At the same time, such a fixing method can also reduce the assembly process and increase the consistency and aesthetics of the product appearance.

[0032] There is not only one way to fix the inner end surface of the plug shell 2 and the limiting plate surface 103. For example, in another feasible embodiment (not shown in the figure), a circular groove is provided on the outer edge of the limiting plate surface 103, and a group of L-shaped grooves are evenly distributed on the side of the circular groove, and a first sealing ring is embedded in the circular groove. A group of card blocks matching the L-shaped groove are provided on the outer wall of the inner end surface of the plug shell 2, and the card blocks are vertically inserted into the L-shaped groove and connected with the L-shaped groove by rotation, and the first sealing ring seals the connection between the plug shell 2 and the limiting plate surface 103.

[0033] Furthermore, five interconnected accommodating chambers are formed between the plug housing 2 and the second chamber 102 to accommodate a group of the connection terminal groups. Specifically, a group of the connection terminal groups includes two power terminal groups, two signal terminal groups and one PE connection terminal group. The plug housing 2 has a first accommodating chamber inside, and a second accommodating chamber is formed between the limit plate surface 103 and the second chamber 102. The first accommodating chamber and the second accommodating chamber are arranged one by one opposite to each other and are interconnected to form the accommodating chamber to accommodate the power terminal group or the signal terminal group or the PE connection terminal group.

[0034] In order to connect to the NACS charging base and the SAE charging gun respectively, the two groups of power terminal groups are located above the two groups of signal terminal groups, and the two groups of power terminal groups and the two groups of signal terminal groups are symmetrically arranged, and the PE connection terminal group is located below between the two groups of signal terminal groups to form the first connection end and the second connection end.

[0035] Specific as Figure 2 and Figure 3As shown, each group of the power terminal groups is formed by riveting a SAE power terminal 301 and a NACS power terminal 302 relative to each other, the SAE power terminal 301 is inserted into the plug housing 2, and the NACS power terminal 302 is inserted into the second chamber 102. A first limiting protrusion 202 is provided on the inner end surface of the plug housing 2, and the joint between the SAE power terminal 301 and the NACS power terminal 302 is fixed in the first limiting protrusion 202, and a second sealing ring 303 and a third sealing ring 304 for sealing the accommodating cavity are respectively embedded on the outer walls of the SAE power terminal 301 and the NACS power terminal 302. The outer contour of the first limiting recess 202 is circular, and its inner wall matches the outer contour of the SAE power terminal 301. The second sealing ring 303 makes the SAE power terminal 301 tightly fit with the inner wall of the first limiting recess 202. Similarly, the NACS power terminal 302 is tightly matched with the inner wall of the second accommodating cavity in the second chamber 102 through the third sealing ring 304 to ensure that the power terminal group does not shake and ensure its installation stability. Furthermore, the fixed connection between the inner end surface of the plug housing 2 and the limiting plate surface 103 can axially limit the power terminal group to prevent it from moving forward and backward, thereby ensuring its installation stability.

[0036] Similarly, a third limiting protrusion 204 is provided on the inner end surface of the plug housing 2, the PE connection terminal group is formed by the first PE connection terminal 501 and the second PE connection terminal 502 being connected, and the connection between the first PE connection terminal 501 and the second PE connection terminal 502 is fixed in the third limiting protrusion 204, and the sixth sealing ring 503 and the seventh sealing ring 504 for sealing the accommodating cavity are also respectively embedded on the outer walls of the first PE connection terminal 501 and the second PE connection terminal 502. The first PE connection terminal 501 seals the first accommodating cavity inside the plug housing 2 through the sixth sealing ring 503, and the second PE connection terminal 502 seals the second accommodating cavity in the second chamber 102 through the seventh sealing ring 504.

[0037] Each group of the signal terminal groups is formed by a SAE signal terminal 401 and a NACS signal terminal 402 fixedly connected by a connecting ring 403. The ends of the SAE signal terminal 401 and the ends of the NACS signal terminal 402 are arranged opposite to each other and riveted to the two ends of the connecting ring 403 respectively. The SAE signal terminal 401 is inserted into the plug housing 2, and the NACS signal terminal 402 is inserted into the second chamber 102. A second limiting convex portion for clamping the connecting ring 403 is provided on the inner end surface of the plug housing 2, and the outer walls of the SAE signal terminal 401 and the NACS signal terminal 402 are respectively embedded with a fourth sealing ring 404 and a fifth sealing ring 405 for sealing the accommodating cavity. The SAE signal terminal 401 seals the first accommodating cavity inside the plug housing 2 through the fourth sealing ring 404, and the NACS signal terminal 402 seals the second accommodating cavity in the second chamber 102 through the fifth sealing ring 405. Among the two groups of signal terminal groups, one is a CP signal terminal group and the other is a CS signal terminal group. The functions of the CP signal terminal and the CS signal terminal group are prior art and will not be elaborated here.

[0038] The second limiting protrusion can be a continuous convex wall matching the outer contour of the connecting ring 403, but for ease of manufacturing, in a preferred embodiment, the second limiting protrusion is composed of two protrusions 203 relatively fixed on the inner end surface of the plug shell 2, the spacing between the two protrusions 203 matches the width of the connecting ring 403, and a trumpet-shaped opening is formed between the ends of the two protrusions 203 to facilitate the insertion of the connecting ring 403.

[0039] In the present embodiment, the two first limiting protrusions 202, the two second limiting protrusions, and the third limiting protrusion 204 together constitute the limiting protrusion, and the limiting recess has two first limiting recesses 1032, two second limiting recesses 1033, and a third limiting recess 1034 that are correspondingly arranged. The limiting protrusions and the limiting recesses are snap-fitted to each other, which can further enhance the connection stability between the insert housing 2 and the housing 1.

[0040] Furthermore, the connecting ring 403 is relatively inclined, and a notch 1035 is provided on the outer wall of the first limiting recess 1032, and the end of the connecting ring 403 is clamped in the notch 1035. Such a structure can save space on the one hand, and make the first connecting end compatible with the NACS charging seat and the second connecting end compatible with the SAE charging gun; on the other hand, it can further enhance the installation stability of the signal terminal group, making it less likely to shake, and ensuring the connection stability and charging efficiency.

[0041] In addition, a clamping block 104 is integrally formed on the top of the outer wall of the first chamber 101 , and a clamping groove 105 is provided on the other side opposite to the clamping block 104 .

[0042] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0043] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A conversion joint, characterized in that: The invention comprises a shell (1) and an insert assembly fixed therein, wherein the shell (1) comprises an integrally formed first chamber (101) and a second chamber (102), the first chamber (101) being hollow inside and having a diameter larger than that of the second chamber (102), and a limit plate surface (103) being formed at the connection between the two. The insert assembly comprises an insert shell (2) and a group of connection terminal groups, the insert shell (2) being built into the first chamber (101), and an annular spacer (100) being formed between the two, the group of connection terminal groups being formed by a group of connection terminals for connecting to a NACS charging seat and a group of connection terminals for connecting to a SAE charging gun, and the inner end surface of the insert shell (2) is A limiting protrusion is provided on the plug housing (2) for limiting the joint of a group of the connecting terminal groups, a limiting recess is correspondingly provided on the limiting plate surface (103), the inner end surface of the plug housing (2) is fixedly connected to the front end surface of the limiting plate surface (103), the limiting protrusion is clamped in the limiting recess, a group of connecting terminals for connecting to a NACS charging seat is passed through the plug housing (2), and the port of the first chamber (101) forms a first connecting end that can be communicated with the NACS charging seat; a group of connecting terminals for connecting to an SAE charging gun is passed through the second chamber (102), and the port of the second chamber (102) forms a second connecting end that can be communicated with the SAE charging gun.

2. The conversion joint according to claim 1, characterized in that: A welding groove (1031) is provided on the outer edge of the limiting plate surface (103), and a fusion rib (201) matching the groove (1031) is convexly provided on the inner end surface of the insert shell (2), and the fusion rib (201) and the welding groove (1031) are integrated by ultrasonic welding to seal the connection between the insert shell (2) and the limiting plate surface (103).

3. The conversion joint according to claim 1, characterized in that: A circular groove is provided on the outer edge of the limiting plate surface (103), a group of L-shaped slots are evenly distributed on the side of the circular groove, and a first sealing ring is embedded in the circular groove. A group of card blocks matching the L-shaped slots are provided on the outer wall of the inner end surface of the plug housing (2), and the card blocks are vertically inserted into the L-shaped slots and are engaged with the L-shaped slots by rotation. The first sealing ring seals the connection between the plug housing (2) and the limiting plate surface (103).

4. The conversion joint according to claim 2 or 3, characterized in that: Five interconnected accommodating cavities are formed between the plug housing (2) and the second chamber (102) for accommodating a group of the connection terminal groups, wherein the group of the connection terminal groups comprises two groups of power terminal groups, two groups of signal terminal groups and one PE connection terminal group, the two groups of the power terminal groups are located above the two groups of the signal terminal groups, and the two groups of the power terminal groups and the two groups of the signal terminal groups are symmetrically arranged, and the PE connection terminal group is located below between the two groups of the signal terminal groups.

5. The conversion joint according to claim 4, characterized in that: Each of the power terminal groups is formed by riveting a SAE power terminal (301) and a NACS power terminal (302) relative to each other; a first limiting convex portion (202) is provided on the inner end surface of the plug housing (2); a butt joint between the SAE power terminal (301) and the NACS power terminal (302) is fixed in the first limiting convex portion (202); and a second sealing ring (303) and a third sealing ring (304) for sealing the accommodating cavity are respectively embedded on the outer walls of the SAE power terminal (301) and the NACS power terminal (302).

6. The conversion joint according to claim 5, characterized in that: Each group of the signal terminals is formed by a SAE signal terminal (401) and a NACS signal terminal (402) fixedly connected via a connecting ring (403); the ends of the SAE signal terminal (401) and the ends of the NACS signal terminal (402) are arranged opposite to each other and are riveted to the two ends of the connecting ring (403), respectively; a second limiting protrusion for clamping the connecting ring (403) is arranged on the inner end surface of the plug housing (2); and a fourth sealing ring (404) and a fifth sealing ring (405) for sealing the accommodating cavity are respectively embedded in the outer walls of the SAE signal terminal (401) and the NACS signal terminal (402).

7. The conversion joint according to claim 6, characterized in that: Each of the second limiting protrusions is composed of two protrusions (203) fixedly arranged on the inner end surface of the insert housing (2) relative to each other, the spacing between the two protrusions (203) matches the width of the connecting ring (403), and a trumpet-shaped opening is formed between the ends of the two protrusions (203).

8. The conversion joint according to claim 7, characterized in that: A third limiting protrusion (204) is provided on the inner end surface of the plug housing (2); the PE connection terminal group is formed by butt-jointing a first PE connection terminal (501) and a second PE connection terminal (502); and a connection point between the first PE connection terminal (501) and the second PE connection terminal (502) is fixedly arranged in the third limiting protrusion (204); and a sixth sealing ring (503) and a seventh sealing ring (504) for sealing the accommodating cavity are respectively embedded on the outer walls of the first PE connection terminal (501) and the second PE connection terminal (502).

9. The conversion joint according to claim 8, characterized in that: The two first limiting protrusions (202), the two second limiting protrusions, and the third limiting protrusion (204) together constitute the limiting protrusion, the limiting recess has two first limiting recesses (1032), two second limiting recesses (1033), and a third limiting recess (1034) that are correspondingly arranged, and the connecting ring (403) is relatively inclinedly arranged, and a notch (1035) is arranged on the outer side wall of the first limiting recess (1032), and the end of the connecting ring (403) is clamped in the notch (1035).

10. The conversion joint according to claim 1, characterized in that: A clamping block (104) is integrally formed on the top of the outer wall of the first chamber (101), and a clamping groove (105) is provided on the other side opposite to the clamping block (104).

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