Quick plugging connector with precise limiting function

Abstract

The utility model discloses a quick plugging connector with an accurate limiting function. The sealing assembly is installed in the connector body, the top cap is arranged on one side of the sealing assembly and used for axially limiting the sealing assembly, and the locking piece is installed at the inserting end of the connector body and used for locking and limiting an inserting piece inserted into the connector body. A butt joint cavity for the insertion of the insertion piece is axially arranged in the joint body; the end, away from the sealing assembly, of the top cap is provided with an annular outwards-protruding lip edge and locking elastic pieces, wherein the locking elastic pieces extend outwards, and the two sides of each locking elastic piece are oppositely arranged. The locking piece comprises limiting blocks which are separated up and down and conduct axial limiting on the inserting piece, the left ends and the right ends of the two limiting blocks are both connected with elastic arms, and the upper elastic arm and the lower elastic arm on the left side and the right side are both connected through a pressure block. According to the utility model, the problem of axial movement of the top cap can be solved, and accurate limiting among the joint body, the top cap and the locking piece can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline connection, and particularly relates to a quick plug - and - unplug joint with a precise limiting function.

Background Art

[0002] A quick plug - and - unplug joint is a joint that can achieve the connection or disconnection of pipelines without tools and is widely used in the connection of pipelines such as gas, gas - liquid common use, and oil pressure. Especially in the connection of automobile cooling pipelines, the existing quick joints used in automobile cooling pipelines need to be locked and fixed with multiple accessories for assembly with the docking pipelines during on - site operations, and there is an easy problem of inaccurate limiting. For example, the releasable plug - in joint for inserting a tubular insert with an outer peripheral rib disclosed in Chinese Patent Publication No. CN1916474A includes a cylindrical insert cavity housing for accommodating the inserted tubular insert and an independent locking ring made of hard / elastic plastic. To ensure the sealing performance of the joint, two sealing rings are designed inside the joint, and an intermediate ring is arranged between the two sealing rings. An isolation ring is arranged on one side of the sealing ring to limit the sealing ring. The isolation ring is directly inserted from one end of the housing to block on one side of the sealing ring to limit the sealing ring. Since the other end of the isolation ring is limited by the locking ring, before the installation of the locking ring, the axial direction of the isolation ring is not limited. Therefore, the isolation ring may move axially outwards, which will cause two problems:

[0003] (1) The sealing ring is not well - limited, resulting in the axial movement and deformation of the sealing ring, thus forming a gap between the sealing ring and the connected pipeline, affecting the overall sealing ring of the joint;

[0004] (2) The outward protrusion of the isolation ring will hinder the smooth installation of the locking ring onto the housing, increasing the difficulty of assembling the locking ring;

[0005] Therefore, it is necessary to provide a quick plug - and - unplug joint with a precise limiting function to solve the above - mentioned technical problems.

Content of the Utility Model

[0006] The main purpose of the utility model is to provide a quick plug - and - unplug joint with a precise limiting function, which can solve the problem of axial movement of the top cap and can also achieve precise limiting between the joint body, the top cap, and the locking part.

[0007] The utility model realizes the above purpose through the following technical scheme: A quick plug - and - unplug joint with a precise limiting function, which includes a joint body, a sealing component installed inside the joint body, a top cap arranged on one side of the sealing component and axially limiting the sealing component, and a locking part installed at the insertion end of the joint body and locking and limiting the insert inserted into the joint body;

[0008] An insertion cavity for inserting an insert is axially arranged inside the joint body;

[0009] At one end of the top cap away from the sealing assembly, an annular outer convex lip and locking elastic pieces extending outwards and oppositely arranged on both sides are provided;

[0010] The locking member includes limiting blocks which are separated up and down and axially limit the insert, and elastic arms are connected to the left and right ends of both limiting blocks, and the upper and lower elastic arms on the left and right sides are connected through pressure blocks.

[0011] Furthermore, a plurality of annular limiting surfaces are arranged inside the connection cavity.

[0012] Furthermore, the sealing assembly includes two annular sealing rings and a separation ring arranged between the two annular sealing rings.

[0013] Furthermore, both sides of the locking elastic piece are disconnected from the outer convex lip.

[0014] Furthermore, an annular limiting groove matched with the outer convex lip and locking slots for inserting and clamping the locking elastic pieces are symmetrically arranged inside the joint body.

[0015] Furthermore, an installation groove for installing the limiting block and two openings oppositely arranged in the radial direction for the pressure block to pass through are arranged at the insertion end of the joint body.

[0016] Furthermore, a limiting protrusion is arranged on the bottom surface of the opening.

[0017] Furthermore, a guiding surface for guiding the insert is arranged at the upper end of the opposite surfaces of the limiting blocks, and an annular protrusion for limiting the insert is arranged in the middle.

[0018] Furthermore, limiting parts extending towards the elastic arms are arranged at both ends of the pressure block, a limiting groove matched with the limiting protrusion is arranged at the bottom, and anti-slip protrusions are arranged on the opposite outer sides.

[0019] Compared with the prior art, the beneficial effects of a quick plug - and - unplug joint with an accurate limiting function of the utility model are as follows:

[0020] (1) The left end of the top cap abuts against the annular sealing ring, the outer convex lip at the right end is matched with the annular limiting groove, and at the same time, the locking elastic piece is clamped into the locking slot to complete the assembly of the top cap and the joint body. At this time, the left end of the top cap can axially limit the sealing assembly, and at the same time, the locking elastic piece at the right end of the top cap is matched and locked with the locking slot of the joint body, which can solve the problem of axial movement of the top cap and realize the accurate limiting between the joint body, the sealing assembly and the top cap;

[0021] (2) Both sides of the locking spring piece are disconnected from the outwardly convex lip edge. The locking spring piece is separately provided after disconnection, which can increase the elasticity of the locking spring piece.

[0022] (3) The cooperation between the limiting protrusion on the joint body and the limiting groove on the pressure block, on the one hand, plays a guiding role when the locking part is installed into the joint body, and can prevent the front and back sides of the locking part from being installed reversely; on the other hand, it can also prevent the locking part from rotating in the joint body, realizing precise positioning between the locking part and the joint body.

[0023] (4) The locking part provided on the quick plug - and - play connector can quickly connect the inserted part. By pressing the locking part, the inserted part can also be quickly pulled out, which is simple and convenient.

Description of the Drawings

[0024] Figure 1 It is a three - dimensional structure schematic diagram of the quick plug - and - play connector with precise positioning function in the embodiment of the present utility model;

[0025] Figure 2 It is a cross - sectional structure schematic diagram of the quick plug - and - play connector with precise positioning function in the embodiment of the present utility model;

[0026] Figure 3 It is a three - dimensional structure schematic diagram of the joint body in the embodiment of the present utility model;

[0027] Figure 4 It is a three - dimensional structure schematic diagram of the top cap in the embodiment of the present utility model;

[0028] Figure 5 It is a top - view structure schematic diagram of the locking part in the embodiment of the present utility model;

[0029] Figure 6 It is a three - dimensional structure schematic diagram of the locking part in the embodiment of the present utility model;

[0030] The numbers in the figure represent:

[0031] 100 - Quick plug - and - play connector with precise positioning function; 200 - Inserted part, 201 - Limiting bulge;

[0032] 1 - Joint body, 11 - Docking cavity, 12 - Annular limiting surface, 13 - Annular limiting groove, 14 - Locking slot, 15 - Installation groove, 151 - Activity gap, 16 - Opening, 17 - Limiting protrusion;

[0033] 2 - Sealing assembly, 21 - Annular sealing ring, 22 - Isolation ring;

[0034] 3 - Top cap, 31 - Outwardly convex lip edge, 32 - Locking spring piece;

[0035] 4 - Locking member, 41 - Limiting block, 411 - Guide surface, 412 - Annular protrusion, 42 - Elastic arm, 43 - Pressure block, 431 - Limiting portion, 432 - Limiting groove, 433 - Anti - slip protrusion.

Detailed implementation manners

[0036] Please refer to Figures 1-6 , in this embodiment, there is a quick - plug - and - unplug connector with a precise limiting function. The quick - plug - and - unplug connector 100 with a precise limiting function includes a connector body 1, a sealing component 2 installed inside the connector body 1, a top cap 3 arranged on one side of the sealing component 2 and axially limiting the sealing component 2, and a locking member 4 installed at the insertion end of the connector body 1 and locking and limiting the insert 200 inserted into the connector body 1.

[0037] An insertion cavity 11 for the insert 200 to be inserted is axially arranged inside the connector body 1. A plurality of annular limiting surfaces 12 are arranged in the insertion cavity 11. The annular limiting surfaces 12 can limit the end face of the sealing component 2 or the end of the insert 200.

[0038] The sealing component 2 includes two annular sealing rings 21 and an isolation ring 22 arranged between the two annular sealing rings 21.

[0039] The top cap 3 is of an annular structure. At the end far from the sealing component 2, the top cap 3 is provided with an annular outer convex lip 31 and anti - lock elastic pieces 32 extending outwards and arranged opposite to each other on both sides. The two sides of the anti - lock elastic pieces 32 are both disconnected from the outer convex lip 31. The anti - lock elastic pieces 32 are separately arranged, which can increase the elasticity of the anti - lock elastic pieces.

[0040] An annular limiting groove 13 cooperating with the outer convex lip 31 and anti - lock slots 14 symmetrically arranged for the anti - lock elastic pieces 32 to be inserted and clamped are arranged inside the connector body 1. The anti - lock elastic pieces 32 are arranged in imitation of the anti - lock slots 14. When the top cap 3 is installed into the connector body 1, the left end of the top cap 3 abuts against the annular sealing ring 21, the outer convex lip 31 at the right end cooperates with the annular limiting groove 13, and at the same time, the anti - lock elastic pieces 32 are clamped into the anti - lock slots 14 to complete the assembly of the top cap 3 and the connector body 1. At this time, the left end of the top cap 3 can axially limit the sealing component 2. At the same time, the anti - lock elastic pieces 32 at the right end of the top cap 3 cooperate with the anti - lock slots 14 of the connector body 1 to lock, which can solve the problem of axial movement of the top cap 3 and realize the precise limiting between the connector body 1, the sealing component 2 and the top cap 3.

[0041] The locking member 4 is made of heat - resistant and chemical - resistant PPA engineering plastic, is suitable for cooling systems and fuel systems, and is integrally injection - molded, having relatively large elasticity.

[0042] The locking member 4 includes a limiting block 41 that is separated up and down and axially limits the insert 200. Elastic arms 42 are connected to the left and right ends of the two limiting blocks 41. The upper and lower elastic arms 42 on the left and right sides are connected through a pressure block 43. The two limiting blocks 41, the four elastic arms 42, and the two pressure blocks 43 are annularly connected, forming a generally annular structure.

[0043] The insertion end of the joint body 1 is provided with an installation groove 15 for installing the limiting block 41 and two openings 16 that are oppositely arranged radially for the pressure block 42 to pass through. A limiting protrusion 17 is provided on the bottom surface of the opening 16.

[0044] On the upper end of the opposite surfaces of the limiting block 41, there is a guiding surface 411 for guiding the insert 200, and in the middle, there is an annular protrusion 412 for limiting the limiting bulge 201 of the insert 200.

[0045] The two ends of the pressure block 43 are provided with limiting portions 431 extending towards the elastic arm 42, the bottom is provided with a limiting groove 432 for cooperating with the limiting protrusion 17, and anti-slip protrusions 433 are provided on the opposite outer sides.

[0046] The cooperation between the limiting protrusion 17 on the joint body 1 and the limiting groove 432 on the pressure block 43, on the one hand, plays a guiding role when the locking member 4 is installed into the joint body 1, and can prevent the front and back of the locking member 4 from being installed in reverse; on the other hand, it can also prevent the locking member 4 from rotating in the joint body 1, realizing the precise positioning between the locking member 4 and the joint body 1.

[0047] The installation process of a quick - plug - and - unplug joint 100 with a precise positioning function provided by this solution is as follows: After applying lubricating oil to the sealing area of the docking cavity 11 inside the joint body 1, the annular sealing ring 21, the isolation ring 22, and the annular sealing ring 21 are sequentially installed. The top cap 3 is installed at the insertion end of the joint body 1. The left end of the top cap 3 abuts against the annular sealing ring 21, and the outer convex lip 31 at the right end cooperates with the annular limiting groove 13. At the same time, the anti - lock spring piece 32 is snapped into the anti - lock slot 14 to complete the assembly of the top cap 3 and the joint body 1. Press the limiting block 41 up and down relatively to reduce the distance between the two limiting blocks 41. One side of the pressure block 43 enters the joint body 1 through the opening 16 until the limiting block 41 completely enters the installation groove 15. When the locking member 4 is installed in place, the cooperation between the limiting protrusion 17 on the opening 16 and the limiting groove 432 on the pressure block 43, there is a moving gap 151 for the limiting block 41 to move between the outer side of the limiting block 41 and the installation groove 15. The pressure block 43 just gets stuck in the opening 16, and the anti - slip protrusion 433 extends out of the opening 16 for easy holding. The quick - plug - and - unplug joint 100 with a precise positioning function is installed.

[0048] When it is necessary to insert the insert 200 into the quick-connect fitting 100 with precise limiting function, hold the insert 200 by hand and insert it into the docking cavity 11. The limiting bulge 201 of the insert 200 is inserted inward along the guiding surface 411 of the limiting block 41, squeezing the limiting block 41 to move outward in the movable gap 151 until the limiting bulge 201 is snapped into the left side of the annular protrusion 412. The annular protrusion 412 blocks the limiting bulge 201 to limit the axial movement of the insert 200, completing the assembly of the insert 200.

[0049] When it is necessary to pull out the insert 200 from the quick-connect fitting 100 with precise limiting function, hold the pressure block 43 by hand and press the pressure block 43 left and right to reduce the distance between the two pressure blocks 43. At this time, squeeze the limiting block 41 to move outward in the movable gap 151, and the distance between the limiting blocks 41 increases, resulting in an increase in the distance between the limiting block 41 and the limiting bulge 201 of the insert 200. At this time, the insert 200 can be quickly pulled out.

[0050] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the creative concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A quick plug - in connector with a precise limit function, characterized in that: It includes a joint body, a sealing component installed inside the joint body, a top cap arranged on one side of the sealing component and axially limiting the sealing component, and a locking member installed at the insertion end of the joint body and locking and limiting an insert inserted into the joint body; A docking cavity for the insert to be inserted is axially arranged inside the joint body; The top cap is provided with an annular outer convex lip at one end away from the sealing component and locking elastic pieces extending outwards and oppositely arranged on both sides; The locking member includes limiting blocks that are separated up and down and axially limit the insert, and elastic arms are connected to the left and right ends of the two limiting blocks, and the upper and lower elastic arms on the left and right sides are both connected through pressure blocks.

2. The quick pluggable connector with accurate limit function according to claim 1, characterized in that: A number of annular limiting surfaces are arranged in the docking cavity; 3. The quick pluggable connector with precise limit function according to claim 1, wherein: The sealing component includes two annular sealing rings and a separation ring arranged between the two annular sealing rings; 4. The quick pluggable connector with precise limit function according to claim 1, wherein: Both sides of the locking elastic piece are arranged disconnected from the outer convex lip; 5. The quick plug-in connector with an accurate limit function according to claim 1, characterized in that: An annular limiting groove matching with the outer convex lip and locking slots symmetrically arranged for the locking elastic pieces to be inserted and clamped are arranged inside the joint body; 6. The quick pluggable connector with a precise limit function as described in claim 1, wherein: An installation groove for installing the limiting block and two openings arranged oppositely in the radial direction for the pressure block to pass through are arranged at the insertion end of the joint body; 7. The quick pluggable connector with accurate limit function according to claim 6, characterized in that: Limiting protrusions are arranged on the bottom surface of the opening; 8. The quick plug - in connector with a precise limit function as described in claim 1, wherein: A guiding surface for guiding the insert is arranged at the upper end of the opposite surface of the limiting block, and an annular protrusion for limiting the insert is arranged in the middle; 9. The quick plug - and - unplug connector with accurate limit function according to claim 7, wherein: Limiting parts extending towards the elastic arms are arranged at both ends of the pressure block, a limiting groove matching with the limiting protrusion is arranged at the bottom, and anti-slip protrusions are arranged on the opposite outer sides.

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