Connector

Abstract

The utility model relates to the technical field of automobile three-electric products, and discloses a connector, which comprises a socket assembly, the socket assembly comprises a socket shell, the insertion end of the socket shell is provided with at least two rows of balls, and the balls are arranged in through ball holes in a rolling manner; a sealing valve assembly is arranged in the socket shell, a push-pull ring is arranged outside the socket shell in a sliding and sleeving manner, the push-pull ring is connected with the socket shell through a first elastic part, a limiting groove, a limiting surface and a connecting surface for connecting the limiting surface with the limiting groove are arranged in the push-pull ring, and the limiting surface is used for limiting the lowest point of the ball to be lower than the inner wall surface of the socket shell; when the first elastic piece is not pressed, the limiting face is arranged right opposite to the ball hole, and before the plug is inserted, the push-pull ring is pushed to move in the insertion direction, so that the limiting groove is arranged right opposite to the ball hole; the plug is provided with a guide surface, the guide surface is connected with the peripheral surface of the plug through a positioning step surface, when the plug is inserted, the guide surface pushes the balls to move outwards in the radial direction so that the balls can enter the limiting grooves, and compatibility and adaptability are high.

Description

Technical Field

[0001] The utility model relates to the technical field of three-electric products for automobiles, and more specifically to a connector. Background Art

[0002] In the prior art, the three-electric products of a car (i.e., battery, electric drive, and electronic control) are usually produced by different manufacturers. Therefore, it is difficult to unify the cooling duct plugs of the three. Not only are there multiple types of quick-connect plugs such as MDC, SAE, and NW, but the plugs of the same type and specification produced by each manufacturer are slightly different, making it difficult to unify the clamping sockets used for the interface with the cooling duct on the test equipment of the three-electric products, which not only increases the equipment cost of the test equipment, but also wastes a lot of test time when changing the sockets for different plugs during testing, thereby increasing the overall cost of the test.

[0003] In summary, how to achieve compatibility with different cooling pipe plugs is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a connector, in which the two rows of balls in the socket housing can respectively form axial limit and eccentric limit for the plug, the structure is simple, and plugs of the same model can share the socket assembly, with strong compatibility and a wide range of adaptability.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A connector, suitable for an MDC plug, comprising a socket assembly for plugging with the plug, the socket assembly comprising a socket housing, the insertion end of the socket housing being provided with at least two rows of balls, the balls rolling in through ball holes, the diameter of the balls being greater than the height of the ball holes;

[0007] The socket housing is provided with a sealing valve assembly for contacting with the plug to be opened under pressure, the outer sliding sleeve of the socket housing is provided with a push-pull ring, the push-pull ring is connected to the socket housing through a first elastic member, and the push-pull ring is provided with a limit groove, a limit surface and a connecting surface connecting the limit surface and the limit groove, the limit surface is used to limit the lowest point of the ball to be lower than the inner wall surface of the socket housing;

[0008] When the first elastic member is not under pressure, the limiting surface is arranged opposite to the ball hole, and before inserting the plug, the push-pull ring is pushed to move along the insertion direction so that the limiting groove is arranged opposite to the ball hole;

[0009] The plug is provided with a guide surface, and the guide surface is connected to the outer peripheral surface of the plug through a positioning step surface. When the plug is inserted, the guide surface pushes the ball to move radially outward so that the ball enters the limiting groove.

[0010] Preferably, the balls in a row are arranged in parallel, and the centers of the balls in the same row are located on the same cross section of the socket housing.

[0011] Preferably, the balls are bonded in the ball holes by grease, and the central angles of two adjacent balls in the same row are the same.

[0012] Preferably, the fixed end of the socket housing is provided with an external thread, the socket base is provided with a threaded hole matching the external thread, and the socket housing is threadedly sleeved in the socket base.

[0013] Preferably, a positioning step is provided on the outer periphery of the socket housing, the push-pull ring is sleeved outside the positioning step, one end of the positioning step abuts against the end surface of the socket base, and the other end of the positioning step is connected to the first elastic member.

[0014] Preferably, a socket sealing ring is provided between the socket housing and the socket base, and the socket sealing ring is provided at an end of the threaded hole relatively away from the plug.

[0015] Preferably, the sealing valve assembly includes a sealing ring, a sealing rod and a waterproof ring, the sealing ring is sleeved in the socket housing, the waterproof ring is arranged at one end of the sealing ring relatively close to the insertion end of the socket housing, and the sealing rod is sleeved in the sealing ring.

[0016] Preferably, at least one sealing ring outer sealing ring is provided between the sealing ring and the socket housing, and a sealing groove for mounting the sealing ring outer sealing ring is provided on the outer periphery of the sealing ring.

[0017] The connector provided by the utility model has at least two rows of balls arranged in the socket housing. When the plug is inserted into the socket housing, the relatively inner row of balls abuts against the positioning step surface of the plug, and the relatively outer row of balls abuts against the outer peripheral surface of the plug and is pressed against the outer peripheral surface of the plug, thereby forming axial and eccentric limiting of the plug. The utility model has a simple structure and is easy to plug and unplug. Plugs of the same type can share the socket assembly, and the compatibility is strong and the adaptability range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 An exploded schematic diagram of a specific embodiment of the connector provided by the utility model;

[0020] Figure 2 for Figure 1 A cross-sectional schematic diagram of

[0021] Figure 3 is a schematic cross-sectional view of a socket base;

[0022] Figure 4 An exploded schematic diagram of a sealing valve assembly;

[0023] Figure 5 is a schematic cross-sectional view of a socket housing;

[0024] Figure 6 is a cross-sectional schematic diagram of a push-pull ring;

[0025] Figure 7 is a cross-sectional schematic diagram of a specific embodiment 1 of the plug;

[0026] Figure 8 is a cross-sectional schematic diagram of a second specific embodiment of the plug;

[0027] Fig. 9 It is a cross-sectional schematic diagram of a third specific embodiment of the plug.

[0028] Figure 1-Figure 9 middle:

[0029] 1-socket base; 2-socket sealing ring; 31-sealing elastic member; 32-sealing ring; 33-sealing rod; 34-waterproof ring; 35-sealing ring outer sealing ring; 4-socket housing; 401-ball hole; 5-push-pull ring; 501-limiting surface; 502-connecting surface; 503-limiting groove; 6-first elastic member; 7-ball; 8-circlip; 9-plug; 901-guide surface. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The core of the utility model is to provide a connector, wherein two rows of balls of the socket housing can respectively form axial limit and eccentric limit for the plug, the structure is simple, and plugs of the same type can share the socket assembly, with strong compatibility and wide adaptability.

[0032] It should be noted that, considering that there are many types of quick-connect connectors for pipe connections, including NW plugs, SAE plugs, MDC plugs, etc., and the structural characteristics of different types of plugs are not the same, the plugs of the same model here refer to plugs of the same type and specification.

[0033] The connector provided by the utility model is suitable for an MDC plug, and includes a socket assembly for plugging with a plug 9, the socket assembly includes a socket housing 4, and the insertion end of the socket housing 4 is provided with at least two rows of balls 7, the balls 7 are rolled in a through ball hole 401, and the diameter of the balls 7 is greater than the height of the ball hole 401;

[0034] A sealing valve assembly for contacting with the socket 9 is provided inside the socket housing 4, and a push-pull ring 5 is provided on the sliding sleeve outside the socket housing 4. The push-pull ring 5 is connected to the socket housing 4 through a first elastic member 6, and the first elastic member 6 is usually set as a spring;

[0035] The push-pull ring 5 is provided with a limiting groove 503, a limiting surface 501 and a connecting surface 502 connecting the limiting surface 501 and the limiting groove 503. The limiting surface 501 is used to limit the lowest point of the ball 7 to be lower than the inner wall surface of the socket housing 4;

[0036] When the first elastic member 6 is not under pressure, the limiting surface 501 is arranged opposite to the ball hole 401. Before inserting the plug 9, the push-pull ring 5 is pushed to move along the insertion direction so that the limiting groove 501 is arranged opposite to the ball hole 401.

[0037] The plug 9 is provided with a guide surface 901, the outer diameter of which gradually decreases along the insertion direction. The guide surface 901 is connected to the outer peripheral surface of the plug 9 through a positioning step surface. When the plug 9 is inserted, the guide surface 901 pushes the ball 7 to move radially outward so that the ball 7 enters the limiting groove 503.

[0038] When in use, first push the push-pull ring 5 to move relative to the socket housing 4 along the insertion direction, so that the limit groove 503 of the push-pull ring 5 is arranged opposite to the ball hole 401 of the socket housing 4, and the axial position of the push-pull ring 5 is maintained unchanged;

[0039] It should be noted that the facing setting here does not limit the axial position of one or even both ends of the limiting groove 503 to be consistent with the axial position of the end face corresponding to the ball hole 401, but requires that the ball 7 can enter the limiting groove 503 when subjected to radial outward pressure.

[0040] Then, the plug 9 is gradually inserted into the socket housing 4, and the guide surface 901 of the plug 9 pushes the two rows of balls 7 to move radially outward into the limiting groove 503 of the push-pull ring 5 until the plug 9 abuts against the sealing valve assembly. At this time, the push-pull ring 5 is released and the axial position of the push-pull ring 5 is no longer maintained unchanged. Under the action of the first elastic member 6, the push-pull ring 5 moves relative to the socket housing 4 in the opposite direction of the insertion direction (that is, the withdrawal direction), and the balls 7 move from the limiting groove 503 along the connecting surface 502 to the limiting surface 501, so that the balls 7 are pressed to move radially inward and press against the outer periphery of the plug 9, thereby locking the plug 9 in the socket housing 4. At the same time, the sealing valve assembly is pressed backward, so that the valve is opened, and at this time, the relatively inner row of balls abuts against the positioning step surface of the plug 9.

[0041] When it is necessary to pull out the plug 9, the push-pull ring 5 is pushed to move relative to the socket housing 4 along the insertion direction, so that the limit groove 503 of the push-pull ring 5 is set opposite to the ball hole 401 of the socket housing 4, and the ball 7 is no longer limited by the limit surface 501. The ball 7 moves radially outward into the limit groove 503, thereby losing the limiting effect on the plug 9. The plug 9 can be pulled out of the socket housing 4. At this time, the sealing valve assembly is closed because it is no longer under pressure.

[0042] In this embodiment, at least two rows of balls 7 are provided in the socket housing 4. When the plug 9 is inserted into the socket housing 4, the relatively inner row of balls abuts against the positioning step surface of the plug 9, and the relatively outer row of balls abuts against the outer peripheral surface of the plug 9 and is pressed against the outer peripheral surface of the plug 9, forming an axial limit and an eccentric limit for the plug 9. The structure is simple and the plug and unplug are convenient. Figure 7-Figure 9 The plug 9 shown can share the socket assembly, and has strong compatibility and a wide range of adaptability.

[0043] The ball 7 is the main limiting structure of the plug 9. In order to prevent the ball 7 from falling out of the ball hole 401, the ball 7 is usually bonded to the ball hole 401 by grease, which not only ensures that the ball 7 will not fall out, but also allows the ball 7 to move radially relative to the ball hole 401.

[0044] In addition, the socket housing 4 may be provided with common axial limiting structures such as a retaining spring 8, a shaft retaining ring, and a limiting step at one end of the ball hole 401 relatively away from the socket base 1, so as to limit the axial displacement of the ball 7 and further prevent the ball 7 from falling out.

[0045] In order to prevent the uneven distribution of the balls 7 from causing different locking forces on the plug 9 in various directions, resulting in eccentricity of the plug 9 and further affecting the fit between the plug 9 and the sealing valve assembly, the central angles of two adjacent balls 7 in the same row are usually set to be the same, so that the balls 7 are evenly distributed in the circumferential direction of the plug 9, thereby making the locking force on the plug 9 relatively uniform.

[0046] In order to ensure the locking effect of the balls 7 on the plug 9, the number of balls 7 in a row of balls 7 should not be too small. The number of rows of balls 7 and the number, structure, size and distribution of balls 7 in each row are calculated and determined based on the size of the balls 7 and the design connection strength in actual production.

[0047] To facilitate the processing of the socket housing 4 , the balls 7 are usually arranged in rows in parallel, and the centers of the balls 7 in the same row are located on the same cross section of the socket housing 4 , that is, the ball row is arranged perpendicular to the axis of the socket housing 4 .

[0048] The fixed end of the socket housing 4 is connected to the socket base 1. In a specific embodiment, the fixed end of the socket housing 4 is provided with an external thread, and the socket base 1 is provided with a threaded hole matching the external thread. The socket housing 4 is threadedly sleeved in the socket base 1, and the connection structure is simple and the connection strength is high.

[0049] Preferably, a socket sealing ring 2 is provided between the socket housing 4 and the socket base 1 , and the socket sealing ring 2 is provided at an end of the threaded hole relatively far away from the plug 9 to enhance the sealing performance between the socket housing 4 and the socket base 11 .

[0050] Based on the above embodiment, the installation method of the push-pull ring 5 is limited. Please refer to Figure 2 and Figure 5 A positioning step is provided on the outer periphery of the socket housing 4 , and the push-pull ring 5 is sleeved outside the positioning step. One end of the positioning step abuts against the end surface of the socket base 5 , and the other end of the positioning step 5 is connected to the first elastic member 6 .

[0051] Therefore, the end surface of the socket base 4 can be used to axially limit the push-pull ring 5. When the push-pull ring 4 abuts against the end surface of the socket base 4, the limit groove 503 of the push-pull ring 5 is arranged to face the ball hole 401 of the socket housing 4, so that the user can quickly align the limit groove 505 and the ball hole 401.

[0052] At the same time, the limiting step is connected to the first elastic member 6 , which facilitates the installation of the first elastic member. Compared with arranging a gasket or a retaining spring on the outer surface of the socket housing 4 , it is helpful to simplify the assembly process of the socket housing 4 .

[0053] On the basis of the above embodiment, the structure of the sealing valve assembly is defined, and the sealing valve assembly includes a sealing ring 32, a sealing rod 33 and a waterproof ring 34. The sealing ring 32 is sleeved in the socket housing 4, the waterproof ring 34 is arranged at one end of the sealing ring 32 relatively close to the insertion end of the socket housing 4, and the sealing rod 33 is sleeved in the sealing ring 32.

[0054] Please refer to Figure 4 The outer periphery of the waterproof ring 34 is provided with a limiting ring, and the inner periphery of the sealing ring 32 is provided with an installation groove for clamping and installing the limiting ring. The waterproof ring 34 is installed on the end of the sealing ring 32 relatively away from the socket base 1 through a clamping structure;

[0055] The elastic seal 31 is arranged inside one end of the sealing ring 32 which is relatively close to the socket base 1, and one end of the coil spring abuts against the axial limiting structure of the sealing ring 32, and the other end abuts against the inner positioning step of the sealing ring 32. The elastic seal 31 is used to press the waterproof ring 34 against the plug 9 when the plug 9 abuts against the waterproof ring 34, and is mostly set as a coil spring.

[0056] When the plug 9 is inserted, the plug 9 abuts against the waterproof ring 34, and the waterproof ring 34 drives the sealing ring 32 to move relative to the socket housing 4 along the insertion direction, so that the valve is opened, and at the same time, the sealing elastic member 31 is compressed and accumulates elastic potential energy;

[0057] After the plug 9 is pulled out, the waterproof ring 34 is no longer subjected to the pressure of the plug 9, and the sealing elastic member 31 pushes the sealing ring 32 and the waterproof ring 34 to move relative to the socket housing 4 in the pulling-out direction, and the valve is closed.

[0058] In order to ensure the sealing performance of the sealing ring 32 during its movement, preferably, at least one sealing ring outer sealing ring 35 is provided between the sealing ring 32 and the socket housing 4, and the outer periphery of the sealing ring 32 is provided with a sealing groove for installing the sealing ring outer sealing ring 35; the specific material, size and setting position of the sealing ring outer sealing ring 35 are determined according to actual production needs and will not be repeated here.

[0059] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0060] The above is a detailed introduction to the connector provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A connector, suitable for an MDC plug, characterized in that: The invention comprises a socket assembly for plugging with a plug, the socket assembly comprises a socket housing, the insertion end of the socket housing is provided with at least two rows of balls, the balls are rolled in through ball holes, and the diameter of the balls is greater than the height of the ball holes; The socket housing is provided with a sealing valve assembly for contacting with the plug to be opened under pressure, the outer sliding sleeve of the socket housing is provided with a push-pull ring, the push-pull ring is connected to the socket housing through a first elastic member, and the push-pull ring is provided with a limit groove, a limit surface and a connecting surface connecting the limit surface and the limit groove, the limit surface is used to limit the lowest point of the ball to be lower than the inner wall surface of the socket housing; When the first elastic member is not under pressure, the limiting surface is arranged opposite to the ball hole, and before inserting the plug, the push-pull ring is pushed to move along the insertion direction so that the limiting groove is arranged opposite to the ball hole; The plug is provided with a guide surface, and the guide surface is connected to the outer peripheral surface of the plug through a positioning step surface. When the plug is inserted, the guide surface pushes the ball to move radially outward so that the ball enters the limiting groove.

2. The connector according to claim 1, characterized in that: The balls in a row are arranged in parallel, and the centers of the balls in the same row are located on the same cross section of the socket housing.

3. The connector according to claim 1, characterized in that: The balls are bonded in the ball holes by grease, and the central angles of two adjacent balls in the same row are the same.

4. The connector according to any one of claims 1 to 3, characterized in that: The fixed end of the socket housing is provided with an external thread, the socket base is provided with a threaded hole matched with the external thread, and the socket housing is threadedly sleeved in the socket base.

5. The connector according to claim 4, characterized in that: A positioning step is provided on the outer periphery of the socket housing, the push-pull ring is sleeved outside the positioning step, one end of the positioning step abuts against the end surface of the socket base, and the other end of the positioning step is connected to the first elastic member.

6. The connector according to claim 4, characterized in that: A socket sealing ring is arranged between the socket housing and the socket base, and the socket sealing ring is arranged at an end of the threaded hole relatively far away from the plug.

7. The connector according to claim 4, characterized in that: The sealing valve assembly includes a sealing ring, a sealing rod and a waterproof ring. The sealing ring is sleeved in the socket housing. The waterproof ring is arranged at one end of the sealing ring relatively close to the insertion end of the socket housing. The sealing rod is sleeved in the sealing ring.

8. The connector according to claim 7, characterized in that: At least one sealing ring outer sealing ring is arranged between the sealing ring and the socket housing, and a sealing groove for installing the sealing ring outer sealing ring is arranged on the outer periphery of the sealing ring.

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