High-voltage connector

Abstract

The high-voltage connector comprises a plug and a socket, a terminal inner core is arranged in the plug, the terminal inner core comprises a shell, female terminals and a terminal locking piece, two accommodating cavities are arranged in the shell, one female terminal is inserted in each accommodating cavity, plugging ports are formed at the near ends of the accommodating cavities, the two plugging ports are arranged at intervals, and the terminal locking piece is arranged on the socket. A limiting groove is formed between the adjacent side walls of the two terminals and the shell, the limiting groove comprises a limiting notch, a first clamping strip and a second clamping strip, the terminal locking piece comprises a main body connecting part, locking arms and a limiting arm, the two locking arms are perpendicularly and fixedly arranged on the two sides of the top of the main body connecting part respectively, and the extending ends of the locking arms are provided with clamping hooks; the limiting arm is vertically and fixedly connected to the bottom of the main body connecting part, the extending end of the limiting arm is provided with a clamping block, and the terminal locking piece is inserted into the limiting groove in a sliding mode. According to the scheme, the locking arm with the clamping hook at the extending end is arranged to limit the female terminal in the front-back direction and the left-right direction at the same time, and the purpose of reliably and stably locking the female terminal is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, and particularly to a high-voltage connector. Background Art

[0002] During the driving process of new energy vehicles, bumps are inevitably generated, causing the female terminal connector to be vibrated. If there is only a basic fixing structure, the female terminal is very easy to loosen or be damaged and fail, which will further lead to the risk of high-voltage leakage and pose a great potential safety hazard. To ensure the use safety of high-voltage connectors, the connection stability between various internal components is extremely important.

[0003] In the prior art, after inserting terminals into the connector, a terminal position retainer (TPA) is usually set to secondarily fix the terminals. As disclosed in publication number CN115207674A, generally, the terminal position retainer is built into the housing. Therefore, in the mated state, the locking effect of the terminal position retainer cannot be detected, and there is a situation where the locking fails due to the improper setting position of the terminal position retainer. In addition, the locking effect of the terminal position retainer is affected by its own strength. The locking strength of a too slender locking arm structure is very limited and cannot adapt to long-term use. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a high-voltage connector.

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

[0006] High-voltage connector, comprising a plug and a socket that can be plugged into each other. The plug has a terminal inner core, and the terminal inner core includes a housing, a female terminal, and a terminal locking member. Two axially extending receiving cavities are symmetrically arranged in the housing, and one of the female terminals is inserted into each of the receiving cavities. An insertion opening is formed at the proximal end of the receiving cavity. The two insertion openings are arranged at intervals, and a limiting groove is formed between the adjacent side walls of the two and the housing. The limiting groove includes a limiting notch recessed in the adjacent side walls of the two insertion openings, a first clamping strip and a second clamping strip protruding from the housing. The first clamping strip and the second clamping strip are arranged in parallel at intervals from outside to inside. The terminal locking member includes a main body connecting portion, a locking arm, and a limiting arm. The two locking arms are respectively vertically fixed on both sides of the top of the main body connecting portion, and the extending ends thereof have hooks. The limiting arm is vertically fixed to the bottom of the main body connecting portion, and the extending end thereof has a clamping block. The terminal locking member is slidably inserted into the limiting groove. In the first state, the clamping block is clamped with the first clamping strip, and the two locking arms are clamped in the limiting notch. At this time, the main body connecting portion does not contact the housing. In the second state, the clamping block is clamped with the second clamping strip, the two locking arms are clamped in the limiting notch, and the two hooks are respectively clamped with the side wall of a female terminal. At this time, the main body connecting portion is in contact with the housing.

[0007] Preferably, the limiting notch is a radially extending strip shape to define that the insertion direction of the terminal locking member is perpendicular to the axial direction of the terminal inner core.

[0008] Preferably, the limiting notch communicates with the bottom of the insertion opening.

[0009] Preferably, the bottom surface of the extending end of the hook protrudes from the bottom surface of the locking arm, and a stepped surface is formed between the two. A limiting recess matching the extending end of the hook is formed at the bottom of the insertion opening. The limiting recess communicates with the limiting notch, so that in the second state, after the extending end of the hook is inserted into the insertion opening, it is limited in the limiting recess.

[0010] Preferably, the main body connecting portion is a flat plate surface, and a connecting plate is vertically fixed to the bottom thereof. The connecting plate is a hollow frame body. The outer contour of the connecting plate matches the bottom of the limiting groove. The limiting arm and the connecting plate are in the same plane, and the limiting arm is located inside the hollow of the connecting plate, and there is a gap between the two. The clamping block protrudes from the bottom of the connecting plate.

[0011] Preferably, a reinforcing rib is horizontally arranged inside the hollow of the connecting plate.

[0012] Preferably, the housing includes a back plate, the accommodation cavity is fixedly arranged on the back plate, the insertion interface is located on the proximal side of the accommodation cavity, and the extending direction of the insertion interface is perpendicular to the axial direction of the terminal inner core, so that the included angle after the plug is inserted into the socket is 90°.

[0013] Preferably, a signal terminal accommodation cavity is vertically and fixedly arranged on the back plate. The signal terminal accommodation cavity is located between the two insertion interfaces. The extending length of the signal terminal accommodation cavity is lower than that of the insertion interface, and signal terminals are inserted into the signal terminal accommodation cavity.

[0014] The beneficial effects of the present utility model are mainly reflected in:

[0015] 1. Locking arms are arranged on both sides of the top of the terminal locking member. The locking arms are fitted with the accommodation cavity in the form of being inserted into the limiting notches. At the same time, the extending ends of the locking arms form hooks to be clamped with the side walls of the female terminals. The terminal locking member forms an integral body with the two side female terminals, so that the hooks limit the female terminals in both the front-back and left-right directions, effectively alleviating the bumps suffered by the female terminals and achieving the purpose of reliably and stably locking the female terminals;

[0016] 2. The bottom of the hook protrudes outwards from the locking arm to form a step surface to be clamped with the limiting recess at the bottom of the insertion interface. The limiting recess defines the insertion direction of the hook to ensure the clamping between the hook and the side wall of the female terminal. On the other hand, the limiting recess can limit the displacement of the hook in the left-right horizontal direction, so that no additional guiding structures such as guiding strips need to be provided on the terminal locking member to define its horizontal position in the limiting groove, simplifying the structures of the terminal locking member and the limiting groove, reducing the manufacturing difficulty and cost, and improving the smoothness of the insertion of the terminal locking member;

[0017] 3. The limiting arm on the terminal locking member is a block-shaped integral structure. Compared with the strip-shaped structures in other solutions, the limiting arm in this solution has better strength, thereby ensuring the stability and reliability of the clamping between it and the first clamping strip and the second clamping strip, also simplifying the manufacturing difficulty and improving the preparation efficiency. The first clamping strip is clamped with the limiting arm to enable the terminal locking member to be pre-loaded into the limiting groove to avoid the loss of the terminal locking member during the pre-loading stage; the second clamping strip is clamped with the limiting arm to completely limit the terminal locking member in the limiting groove to achieve the locking of the two side female terminals. The limiting groove is a visible structure, and it can be directly judged whether the terminal locking member is inserted in place by observing whether the terminal locking member protrudes out of the limiting groove, avoiding the situation where the terminal locking member is not inserted in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the present utility model will be further described below with reference to the accompanying drawings:

[0019] Figure 1 : Schematic diagram of the embodiment of the present utility model in the first state;

[0020] Figure 2 : Schematic diagram of the embodiment of the present utility model in the second state;

[0021] Figure 3 : Front view of the embodiment of the present utility model in the second state;

[0022] Figure 4 : Schematic diagram of the terminal locking member in the embodiment of the present utility model;

[0023] Figure 5 : Schematic diagram of the terminal locking member from another angle in the embodiment of the present utility model. Detailed implementation manners

[0024] The present utility model will be described in detail below in conjunction with the specific implementation manners shown in the drawings. However, these implementation manners are not limited to the present utility model, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these implementation manners is included in the protection scope of the present utility model.

[0025] In the description of the solution, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. And, in the description of the solution, with the operator as the reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0026] Such as Figures 1 to 5As shown in the figure, the present utility model discloses a high-voltage connector, which includes a plug and a socket that can be plugged into each other. The plug has a terminal inner core, and the terminal inner core includes a housing 1, a female terminal 2, and a terminal locking member 3. Two axially extending accommodating cavities 101 are symmetrically arranged in the housing 1. Each accommodating cavity 101 is inserted with a female terminal 2. An insertion port 102 is formed at the proximal end of the accommodating cavity 101. The two insertion ports 102 are spaced apart, and a limiting groove 100 is formed between the adjacent side walls of the two and the housing 1. The limiting groove 100 includes a limiting notch 103 recessed in the adjacent side walls of the two insertion ports 102, a first clamping strip 104 and a second clamping strip 105 protruding from the housing 1. The first clamping strip 104 and the second clamping strip 105 are arranged parallel to each other at intervals from outside to inside. The terminal locking member 3 includes a main body connecting portion 301, a locking arm 302, and a limiting arm 303. The two locking arms 302 are respectively vertically fixed on both sides of the top of the main body connecting portion 301, and the extending ends thereof have hooks 3021. The limiting arm 303 is vertically fixed to the bottom of the main body connecting portion 301, and the extending end thereof has a clamping block 3031. The terminal locking member 3 is slidably inserted into the limiting groove 100. In the first state, the clamping block 3031 is clamped with the first clamping strip 104, and the two locking arms 302 are clamped in the limiting notch 103. At this time, the main body connecting portion 301 does not contact the housing 1. In the second state, the clamping block 3031 is clamped with the second clamping strip 105, the two locking arms 302 are clamped in the limiting notch 103, and the two hooks 3021 are respectively clamped with the side wall of a female terminal 2. At this time, the main body connecting portion 301 is in contact with the housing 1.

[0027] In this solution, locking arms 302 are arranged on both sides of the top of the terminal locking member 3. The locking arms 302 are fitted with the accommodating cavity 101 by being inserted into the limiting notch 103. At the same time, the extending ends of the locking arms 302 form hooks 3021 to be clamped with the side wall of the female terminal 2. An integral body is formed between the terminal locking member 3 and the two female terminals 2 on both sides, so that the hooks 3021 limit the female terminal 2 in both the front-back and left-right directions, effectively alleviating the jolting received by the female terminal 2 and achieving the purpose of reliably and stably locking the female terminal 2.

[0028] Specifically, as Figures 1 - 3 shown, the limiting notch 103 is a radially extending strip shape to define that the insertion direction of the terminal locking member 3 is perpendicular to the axial direction of the terminal inner core, so that the terminal locking member 3 has a stable locking effect on the two female terminals 2.

[0029] Furthermore, the limiting notch 103 is communicated with the bottom of the insertion port 102 to avoid the insertion part when the female terminal 2 is plugged into the socket.

[0030] The bottom surface of the extension end of the card hook 3021 protrudes outward from the bottom surface of the locking arm 302, and a stepped surface 3022 is formed therebetween. A limiting recess 1021 matching the extension end of the card hook 3021 is formed at the bottom of the insertion interface 102. The limiting recess 1021 communicates with the limiting notch 103, so that in the second state, after the extension end of the card hook 3021 is inserted into the insertion interface 102, it is limited within the limiting recess 1021. On the one hand, the limiting recess 1021 limits the insertion direction of the card hook 3021 to ensure the clamping between the card hook 3021 and the side wall of the female terminal 2, so as to limit the female terminal 2. On the other hand, the limiting recess 1021 can restrict the displacement of the card hook 3021 in its left-right horizontal direction. Furthermore, no additional guiding structures such as guiding bars need to be provided on the terminal locking member 3 to limit its horizontal position in the limiting groove 100, and no other limiting and guiding structures need to be provided in the limiting groove 100 either. Thus, the structures of the terminal locking member 3 and the limiting groove 100 are greatly simplified, the manufacturing difficulty and cost are reduced, and the smoothness of the insertion of the terminal locking member 3 is also improved.

[0031] As Figure 4 , Figure 5 shown, the main body connecting portion 301 is a flat plate surface, and a connecting plate 304 is vertically fixed to its bottom. The connecting plate 304 is a hollow frame body. The outer contour of the connecting plate 304 matches the bottom of the limiting groove 100. The limiting arm 303 and the connecting plate 304 are in the same plane, and the limiting arm 303 is located inside the hollow of the connecting plate 304, with a gap therebetween. The clamping block 3031 protrudes outward from the bottom of the connecting plate 304. The connecting plate 304 surrounds the outside of the limiting arm 303, enhancing the bottom strength and overall stability of the terminal locking member 3. Its outer contour matches the bottom of the limiting groove 100, playing a role of limiting and guiding for the terminal locking member 3, so that the terminal locking member 3 will not shift in the limiting groove 100.

[0032] A reinforcing rib 305 is horizontally arranged inside the hollow of the connecting plate 304 to further enhance the strength of the connecting plate 304.

[0033] The limiting arm 303 in this solution is a block-shaped integral structure. Compared with the strip-shaped structures in other solutions, the limiting arm 303 in this solution has better strength, thus ensuring the stability and reliability of the clamping connection between it and the first clamping strip 104 and the second clamping strip 105. It also simplifies the manufacturing difficulty and improves the preparation efficiency. Both the front and rear sides of the limiting arm 303 are inclined planes extending obliquely, and the front and rear side surfaces of the first clamping strip 104 and the second clamping strip 105 are also inclined planes matching the front and rear sides of the limiting arm 303 to facilitate the clamping connection between the limiting arm 303 and the first clamping strip 104 or the second clamping strip 105.

[0034] In the first state, the first clamping strip 104 is clamped with the limiting arm 303 so that the terminal locking member 3 can be pre-loaded into the limiting groove 100 to prevent the loss of the terminal locking member 3 during the pre-loading stage. In the second state, the second clamping strip 105 is clamped with the limiting arm 303 to completely confine the terminal locking member 3 within the limiting groove 100, realizing the locking of the two-sided female terminals 2. The second state in this solution is the locking state of the terminal locking member 3, that is, the terminal locking member 3 is completely inserted into the limiting groove 100 to lock the two-sided female terminals 2 at the same time. In the illustrated preferred embodiment, the limiting groove 100 is a visible structure, and it is possible to visually judge whether the terminal locking member 3 is inserted in place by observing whether the terminal locking member 3 protrudes from the limiting groove 100 (that is, in the second state, by observing whether the outer end wall of the hook 3021 is completely flush with the outer end wall of the insertion interface 102), avoiding the situation where the terminal locking member is not inserted in place.

[0035] Furthermore, the housing 1 includes a back plate 106, the accommodating cavity 101 is fixedly arranged on the back plate 106, the insertion interface 102 is located on the proximal side of the accommodating cavity 101, and the extending direction of the insertion interface 102 is perpendicular to the axial direction of the terminal inner core, so that the included angle between the plug and the socket after insertion is 90°, and the plug is vertically inserted into the socket. Such an insertion method makes the insertion direction of the plug the same as the insertion direction of the terminal locking member 3, so that even when the terminal locking member 3 is not inserted in place, the plug can drive the terminal locking member 3 to be inserted synchronously to complete the insertion of the terminal locking member 3, which is convenient and fast.

[0036] A signal terminal receiving cavity 107 is vertically fixed on the backplane 106. The signal terminal receiving cavity 107 is located between the two jacks 102. The extension length of the signal terminal receiving cavity 107 is lower than that of the jacks 102. Signal terminals (not shown in the figure) are inserted into the signal terminal receiving cavity 107. The structure that the backward terminal receiving cavity 107 is lower than the jacks 102 enables the female terminal 2 to be distributedly connected and disconnected from the off-the-shelf terminal, that is, after the female terminal 2 is connected first, the signal terminal is then connected; after the signal terminal is disconnected, the female terminal 2 is then disconnected, avoiding the hot plugging and unplugging of the plug and ensuring the use safety.

[0037] It should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0038] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A high voltage connector, comprising a plug and a socket that can be plugged together, wherein the plug has a terminal core, characterized in that: The terminal core comprises a shell (1), a female terminal (2) and a terminal locking member (3); the shell (1) is symmetrically provided with two axially extending accommodating cavities (101); each of the accommodating cavities (101) is inserted with a female terminal (2); a plug interface (102) is formed at the proximal end of the accommodating cavity (101); the two plug interfaces (102) are arranged at intervals, and a limiting groove (100) is formed between the adjacent side walls of the two plug interfaces and the shell (1); the limiting groove (100) comprises a limiting notch (103) recessed on the adjacent side walls of the two plug interfaces (102), a first clamping strip (104) and a second clamping strip (105) protruding on the shell (1); the first clamping strip (104) and the second clamping strip (105) are arranged in parallel from the outside to the inside at intervals; the terminal locking member (3) comprises a main body connecting portion (301), a locking arm (302) and a limiting arm (303); the two locking arms (30 2) are respectively vertically fixed on both sides of the top of the main body connection part (301), and the extending end thereof has a hook (3021), the limiting arm (303) is vertically fixed to the bottom of the main body connection part (301), and the extending end thereof has a block (3031), the terminal locking member (3) is slidably inserted in the limiting groove (100), in the first state, the block (3031) is engaged with the first clamping strip (104), and the two locking arms (30 2) is clamped in the limiting notch (103), at which time the main body connection portion (301) is not in contact with the shell (1); in the second state, the clamping block (3031) is clamped with the second clamping strip (105), the two locking arms (302) are clamped in the limiting notch (103), and the two clamping hooks (3021) are respectively clamped with the side wall of a female terminal (2), at which time the main body connection portion (301) is in contact with the shell (1).

2. The high voltage connector according to claim 1, characterized in that: The limiting notch (103) is in the shape of a radially extending strip, so as to limit the insertion direction of the terminal locking piece (3) to be perpendicular to the axial direction of the terminal inner core.

3. The high voltage connector according to claim 2, characterized in that: The limiting notch (103) is in communication with the bottom of the plug interface (102).

4. The high voltage connector according to claim 3, characterized in that: The bottom surface of the extended end of the hook (3021) protrudes outward from the bottom surface of the locking arm (302), and a step surface (3022) is formed between the two. The bottom of the plug interface (102) is formed with a limiting recess (1021) that matches the extended end of the hook (3021), and the limiting recess (1021) is connected to the limiting notch (103), so that in the second state, the extended end of the hook (3021) is limited in the limiting recess (1021) after being inserted into the plug interface (102).

5. The high voltage connector according to claim 4, characterized in that: The main connecting portion (301) is a flat plate surface, and a connecting plate (304) is vertically fixed at the bottom thereof; the connecting plate (304) is a frame body with a hollow interior; the outer contour of the connecting plate (304) matches the bottom of the limiting groove (100); the limiting arm (303) and the connecting plate (304) are in the same plane, and the limiting arm (303) is located in the hollow interior of the connecting plate (304), with a gap therebetween; and the clamping block (3031) protrudes from the bottom of the connecting plate (304).

6. The high voltage connector according to claim 5, characterized in that: A reinforcing rib (305) is transversely arranged in the hollow interior of the connecting plate (304).

7. The high voltage connector according to any one of claims 1 to 6, characterized in that: The housing (1) comprises a back plate (106), the accommodating cavity (101) is fixedly arranged on the back plate (106), the plug interface (102) is located on the proximal side of the accommodating cavity (101), and the extension direction of the plug interface (102) is perpendicular to the axial direction of the terminal core, so that the angle between the plug and the socket after being plugged in is 90°.

8. The high voltage connector according to claim 7, characterized in that: A signal terminal accommodating cavity (107) is vertically fixed on the back plate (106), the signal terminal accommodating cavity (107) is located between the two plug interfaces (102), the extension length of the signal terminal accommodating cavity (107) is lower than the plug interfaces (102), and a signal terminal is inserted into the signal terminal accommodating cavity (107).

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