Joint structure and pipe assembly

Abstract

The utility model provides a kind of joint structure and pipeline assembly, it is related to pipeline connection technical field.The joint structure joint shell and U-shaped clamp;Two sides of joint shell are respectively equipped with limit hole, clamp includes two clamping legs and connecting rod, clamp is clamped on joint shell by limit hole, two clamping legs are respectively inserted into joint shell by two limit holes;The end portion of two clamping legs away from connecting rod is equipped with clamping hook, and clamping hook is abutted at the outer wall of joint shell away from connecting rod;The position corresponding with connecting rod of joint shell outer wall is equipped with lifting protrusion, and lifting protrusion is abutted on the side of connecting rod close to clamping leg to lengthen the length of clamping leg between connecting rod and clamping hook.The joint structure is supported to clamp by lifting protrusion, can lengthen clamping leg, so that clamping leg is easily deformed in the process that male joint is inserted into female joint, reduce the insertion resistance of clamp to male joint, improve the convenience of male joint and female joint insertion process.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and in particular to a connector structure and pipeline assembly. Background Technology

[0002] Automotive cooling pipes and other pipes are usually interconnected by a connector structure. One existing connector structure includes a female connector, a male connector and a U-shaped clamp. The clamp includes two clamping legs. The female connector has a socket extending circumferentially on its housing. The clamp is inserted into the socket and the middle part of its clamping legs is exposed inside the female connector through the socket.

[0003] During the insertion of the male connector into the female connector, the flange on the male connector compresses the retaining legs inside the female connector, causing the retaining legs to expand radially outwards along the female connector. Once the flange has passed the retaining legs, the retaining clips return to their original shape due to their elasticity, allowing the middle portion of the retaining legs to re-enter the female connector. Simultaneously, the retaining legs abut against the side of the flange on the male connector near the female connector interface, preventing the male connector from being pulled out of the female connector. To prevent the end of the retaining leg located at the clamp opening from entering the female connector and interfering with the insertion process, the end of the retaining leg on the clamp opening side usually has a hook extending axially along the female connector. This hook abuts against the outside of the female connector housing. The seal between the male and female connectors is achieved by a sealing ring located inside the female connector that abuts against the end of the male connector.

[0004] However, during the process of inserting the male connector into the female connector, not only will the end of the male connector be subjected to the reverse thrust applied by the elastic sealing ring, but the flange of the male connector will also be subjected to the resistance applied by the clamp. As a result, the overall insertion process of the male connector is subject to greater resistance, making the operation more inconvenient. Utility Model Content

[0005] The purpose of this utility model is to provide a connector structure and pipeline assembly to alleviate the technical problem in the prior art where, during the process of inserting the male connector into the female connector, not only is the end of the male connector subjected to the reverse thrust applied by the elastic sealing ring, but the flange of the male connector is also subjected to the resistance applied by the clamp, resulting in a large resistance during the overall insertion process of the male connector and inconvenience in operation.

[0006] In a first aspect, this utility model provides a connector structure, including a connector housing and a U-shaped clip;

[0007] The connector housing has limiting holes extending circumferentially on both sides. The clamp includes two clamping legs and a connecting rod connected between the two clamping legs. The clamp is engaged with the connector housing through the limiting holes, and the positions of the two clamping legs corresponding to the limiting holes extend into the interior of the connector housing through the two limiting holes respectively.

[0008] Each of the two clamping legs, at its ends away from the connecting rod, is provided with a hook extending axially along the connector housing, the hook abutting against the outer wall of the connector housing on the side away from the connecting rod;

[0009] The outer wall of the connector housing is provided with a lifting protrusion at the position corresponding to the connecting rod. The lifting protrusion abuts against the side of the connecting rod near the locking leg to extend the length of the locking leg between the connecting rod and the locking hook.

[0010] In an optional embodiment, the lifting protrusion is provided with a limiting groove extending circumferentially along the connector housing, and the connecting rod is located within the limiting groove.

[0011] In an optional embodiment, there are two limiting grooves, which are distributed circumferentially around the connector housing, and the ends of the two limiting grooves that are far apart from each other are connected to the two limiting holes.

[0012] In an optional implementation, a sealing ring is also included;

[0013] The connector housing includes a plug end for inserting into a matching piece, and the sealing ring is disposed inside the connector housing and located on the side of the clip away from the plug end;

[0014] The sealing ring has an annular groove extending circumferentially on the side facing the clip and / or the side facing away from the snap-fit.

[0015] In an optional embodiment, an identification element is also included, which has a marking layer for identifying the identity of the connector structure;

[0016] The side wall of the connector housing is provided with a window. The marking member is slidably connected to the inside of the connector housing along the axial direction of the connector housing. The marking member is used to move along the axial direction of the connector housing under the push of the matching member when a matching member is inserted into the connector housing, so as to drive the marking layer to move to the window.

[0017] In an optional embodiment, the side wall of the connector housing that is slidably connected to the marking member is a blocking part, the blocking part is provided with a blocking hole, and the side of the marking member facing the blocking part is provided with a limiting protrusion, the limiting protrusion being used to extend into the blocking hole and abut against the inner wall of the blocking hole when the marking layer moves to the window.

[0018] In an optional embodiment, the side of the limiting protrusion facing the blocking portion is a slope, and the slope is inclined from the side closer to the opponent to the side farther from the opponent toward the central axis of the connector housing.

[0019] In an optional embodiment, there are multiple blocking holes, which are spaced apart along the axial direction of the connector housing. The limiting protrusion is used to sequentially extend into the multiple blocking holes when the marking member is pushed by the hand member.

[0020] In an optional embodiment, there are multiple limiting protrusions, which are distributed at intervals along the axial direction of the connector housing, and the interval between any two adjacent limiting protrusions in any group is equal to the distance between any two adjacent blocking holes in any group.

[0021] Secondly, this utility model provides a pipeline assembly, including the connector structure described in any of the foregoing embodiments.

[0022] The connector structure provided by this utility model includes a connector housing and a U-shaped clamp. Limiting holes extending circumferentially along both sides of the connector housing are provided. The clamp includes two legs and a connecting rod connecting the two legs. The clamp is engaged with the connector housing through the limiting holes, and the positions of the two legs corresponding to the limiting holes extend into the interior of the connector housing through the two limiting holes respectively. Each end of the two legs away from the connecting rod has a hook extending axially along the connector housing, which abuts against the outer wall of the connector housing on the side away from the connecting rod. A lifting protrusion is provided on the outer wall of the connector housing at the position corresponding to the connecting rod, abutting against the side of the connecting rod near the legs to extend the length of the legs between the connecting rod and the hook. The connector structure provided by this utility model is used for connection and fixation between female and male connectors. The connector housing can be the housing of the female connector, and correspondingly, the male connector is the insertion partner of the connector housing. The clamp in the connector structure is used to abut and limit the male connector inserted into the female connector. One end of the connector housing is typically used as a plug-in end for inserting the male connector into the female connector. When inserting the male connector into the female connector, the male connector can be directly pushed into the female connector from its plug-in end. It should be noted that the male connector usually has a flange between its two ends for opening the clamp. Once the male connector moves to the clamp position within the female connector, the two clamping legs, corresponding to the limiting holes, extend into the connector housing through these holes. Therefore, the male connector can apply a radially outward compressive force to the two clamping legs simultaneously through its flange, causing the clamp to deform and open radially outward along the female connector. Furthermore, because the outer wall of the connector housing in this invention has a lifting protrusion at the position corresponding to the connecting rod, and the lifting protrusion abuts against the side of the connecting rod near the clamping leg to extend the length of the clamping leg between the connecting rod and the clamping hook, the lever arm of the clamping leg is extended. When the flange applies an outward radial compressive force to the clamping leg, the clamping leg is more likely to deform outward, thereby reducing the reverse resistance applied by the clamp to the male connector flange, making it easier for the male connector to enter the female connector. When the male connector is inserted into the female connector and the flange on it passes the clamping leg, the clamping leg is no longer subjected to outward compressive force and returns to its original deformation. At the same time, the clamping leg abuts against the side of the flange near the insertion end of the female connector, thereby limiting and fixing the male connector inside the female connector. It should be noted that because the clamping hook at the end of the clamping leg away from the connecting rod can abut against the outer wall of the connector housing on the side away from the connecting rod, and the clamping hook extends along the axial direction of the connector housing, the clamping hook can also ensure the balance of the clamp on the connector housing and play a limiting role for the clamp, effectively preventing the end of the clamping leg from entering the interior of the connector housing and affecting the insertion process of the male connector.It should also be noted that during the insertion of the male connector, the clamping leg deforms radially outward along the female connector. When the male connector is inserted into place and the clamp returns to its original shape, the clamping leg limits and abuts against the male connector flange along the axial direction of the female connector. Therefore, although the connector structure provided by this utility model makes the clamping leg easier to deform by extending its length, the direction of its abutment force against the male connector flange will not change after the length of the clamping leg is extended, and the abutment and limiting effect of the clamping leg on the male connector will not be reduced. The limiting effect of the clamp on the male connector within the female connector can still be guaranteed.

[0023] Compared with the prior art, the connector structure provided by this utility model supports the clamp by raising the protrusion, which can extend the length of the clamp leg. This makes the clamp leg easier to deform during the insertion of the male connector into the female connector, thereby reducing the insertion resistance of the clamp to the male connector and improving the convenience of the insertion process between the male and female connectors.

[0024] This utility model also provides a pipeline assembly that includes the above-described connector structure, and thus the pipeline assembly has the same beneficial effects as the above-described connector structure. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the connector structure provided in an embodiment of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the clip provided in an embodiment of the present utility model;

[0028] Figure 3 A cross-sectional view of the connector structure provided in an embodiment of this utility model;

[0029] Figure 4 This is a partial structural diagram of the connector structure provided in an embodiment of the present utility model;

[0030] Figure 5 A schematic diagram of the structure of the identification component provided in this embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the shielding part and the partial connector housing provided in the embodiment of this utility model.

[0032] Icons: 1-Connector housing; 10-Limiting hole; 11-Lifting protrusion; 110-Limiting groove; 12-Plug end; 13-Window; 14-Shielding part; 140-Blocking hole; 2-Clip; 20-Clip leg; 21-Connecting rod; 22-Clip hook; 3-Sealing ring; 30-Annular groove; 4-Identifier; 40-Marking layer; 41-Limiting protrusion. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] Example:

[0037] like Figure 1 and Figure 2 As shown, the connector structure provided in this embodiment includes a connector housing 1 and a U-shaped clamp 2. Limiting holes 10 extending circumferentially along both sides of the connector housing 1 are provided. The clamp 2 includes two clamping legs 20 and a connecting rod 21 connecting the two clamping legs 20. The clamp 2 is clamped onto the connector housing 1 through the limiting holes 10, and the positions of the two clamping legs 20 corresponding to the limiting holes 10 extend into the interior of the connector housing 1 through the two limiting holes 10 respectively. The ends of the two clamping legs 20 away from the connecting rod 21 are each provided with hooks 22 extending axially along the connector housing 1. The hooks 22 abut against the outer wall of the connector housing 1 on the side away from the connecting rod 21. A lifting protrusion 11 is provided on the outer wall of the connector housing 1 at the position corresponding to the connecting rod 21. The lifting protrusion 11 abuts against the side of the connecting rod 21 near the clamping legs 20 to extend the length of the clamping legs 20 between the connecting rod 21 and the hooks 22.

[0038] The connector structure provided in this embodiment is used for connection and fixation between a female connector and a male connector. The connector housing 1 can be the housing of the female connector, and the corresponding male connector is the mating part that inserts into the connector housing 1. The clip 2 in the connector structure is used to abut and limit the male connector inserted into the female connector. One end of the connector housing 1 is usually used as the insertion end 12 for the mating part to be inserted. During the process of inserting the male connector into the female connector, the male connector can be directly pushed into the female connector from the insertion end 12 of the female connector.

[0039] It should be noted that the male connector typically has a flange between its two ends for pushing open the clamp 2. When the male connector moves to the position of the clamp 2 within the female connector, the two clamping legs 20, corresponding to the limiting holes 10, extend into the interior of the connector housing 1 through the two limiting holes 10. Therefore, the male connector can simultaneously apply outward radial pressure to the two clamping legs 20 of the clamp 2 through its flange, causing the clamp 2 to deform and open radially outward along the female connector. Furthermore, in this embodiment, the outer wall of the connector housing 1 has a lifting protrusion 11 at the position corresponding to the connecting rod 21, and the lifting protrusion 11 abuts against the side of the connecting rod 21 near the clamping legs 20 to extend the length of the clamping legs 20 between the connecting rod 21 and the hook 22. Thus, the lever arm of the clamping legs 20 is extended. When the flange applies outward radial pressure to the clamping legs 20, the clamping legs 20 are more likely to deform outward, thereby reducing the reverse resistance applied by the clamp 2 to the male connector flange, making it easier for the male connector to enter the female connector. When the male connector is inserted into the female connector and the flange passes the clamp 20, the clamp 20 is no longer subjected to outward compressive force and returns to its original shape. At the same time, the clamp 20 will abut against the side of the flange near the female connector insertion end 12, thereby limiting and fixing the male connector inside the female connector.

[0040] It should be noted that, because the hook 22 at the end of the clamping leg 20 away from the connecting rod 21 can abut against the outer wall of the connector housing 1 on the side away from the connecting rod 21, and the hook 22 extends axially along the connector housing 1, the hook 22 can also ensure the balance of the clamp 2 on the connector housing 1 and limit the clamp 2, effectively preventing the end of the clamping leg 20 from entering the interior of the connector housing 1 and affecting the insertion process of the male connector. To further improve the limiting effect of the hook 22, such as... Figure 1 As shown, in this embodiment, the hooks 22 on the two legs 20 are preferably bent in opposite directions.

[0041] It should also be noted that, during the insertion of the male connector, the clamp 20 deforms radially outward along the female connector. When the male connector is inserted into place and the clamp 2 returns to its original shape, the clamp 20 limits and abuts the male connector flange along the axial direction of the female connector. Therefore, although the connector structure provided in this embodiment makes the clamp 20 easier to deform by extending its length, the direction of its abutment force on the male connector flange will not change after the length of the clamp 20 is extended, and the abutment and limiting effect of the clamp 20 on the male connector will not be reduced. The limiting effect of the clamp 2 on the male connector within the female connector can still be guaranteed.

[0042] Compared with the prior art, the connector structure provided in this embodiment supports the clip 2 by raising the protrusion 11, which can extend the length of the clip leg 20 of the clip 2. This makes the clip leg 20 of the clip 2 easier to deform during the process of inserting the male connector into the female connector, thereby reducing the insertion resistance of the clip 2 to the male connector and improving the convenience of the insertion process of the male connector and the female connector.

[0043] In this embodiment, the material of the connector housing 1 can be either hydrolysis-resistant PA66-GF30 (polyamide 66 engineering plastic reinforced with 30% glass fiber) or PP-GF30 (polypropylene modified material reinforced with 30% glass fiber).

[0044] To ensure the extension effect of the lifting protrusion 11 on the clamping leg 20 and effectively reduce the insertion resistance of the male connector, in this embodiment, the length of the extended clamping leg 20 preferably does not exceed 2mm of the outer diameter of the envelope of the lifting protrusion 11 rotating around the central axis of the connector housing 1. Actual verification shows that the insertion resistance of the clamp 2 on the male connector can be reduced to 45N or 47N. Compared to the 67N insertion resistance generated by the existing clamp 2 on the male connector, the clamp 2 provided in this embodiment can effectively improve the ease of insertion between the male and female connectors.

[0045] like Figure 1 As shown, the lifting protrusion 11 is provided with a limiting groove 110 extending circumferentially along the connector housing 1, and the connecting rod 21 is located in the limiting groove 110.

[0046] The limiting groove 110 can limit the connecting rod 21 of the clip 2, further improving the installation stability of the clip 2 on the connector housing 1.

[0047] Furthermore, there are two limiting grooves 110, which are distributed circumferentially along the connector housing 1, and the ends of the two limiting grooves 110 that are far apart from each other are connected to the two limiting holes 10.

[0048] At this time, the limiting groove 110 can cooperate with the limiting hole 10 to effectively improve the limiting effect of the clip 2 on the connector housing 1, thereby effectively improving the installation stability and usage stability of the clip 2.

[0049] like Figure 3 As shown, the connector structure provided in this embodiment also includes a sealing ring 3; the connector housing 1 includes a plug end 12 for inserting into the fitting, and the sealing ring 3 is disposed inside the connector housing 1 and located on the side of the clip 2 away from the plug end 12; the sealing ring 3 has an annular groove 30 extending circumferentially on the side facing the clip 2 and / or the side away from the clip 2.

[0050] The sealing ring 3 is used to seal between the male connector and the connector housing 1 after the male connector is inserted into place. The sealing ring 3 is placed on the side of the clip 2 away from the insertion end 12 in order to ensure that the sealing ring 3 can play a sealing role.

[0051] It should be noted that during the process of inserting the male connector into the connector housing 1, the end of the male connector located inside the connector housing 1 will squeeze the sealing ring 3 and thus be subjected to the reverse thrust of the sealing ring 3. The reverse thrust caused by the sealing ring 3 will also cause the male connector to experience greater resistance during the insertion process.

[0052] In this embodiment, an annular groove 30 extending circumferentially is provided on the side of the sealing ring 3 facing the clip 2 and / or the side facing away from the clip 2. The annular groove 30 can be used to increase the ease of deformation of the sealing ring 3, thereby reducing the reverse thrust of the sealing ring 3 on the end of the male connector and reducing the insertion resistance of the male connector.

[0053] To minimize the insertion resistance of the male connector, in this embodiment, the sealing ring 3 preferably has an annular groove 30 extending circumferentially on both the side facing the clip 2 and the side facing away from the clip 2. In this case, the radial cross section of the sealing ring 3 is approximately H-shaped.

[0054] Furthermore, the groove depth of the annular groove 30 on the side of the sealing ring 3 facing the clip 2 can be less than the groove depth of the annular groove 30 on the side facing away from the clip 2. Specifically, the groove width of the annular groove 30 on the side of the sealing ring 3 facing away from the clip 2 decreases from the groove opening to the groove bottom. This arrangement effectively ensures the sealing effect of the sealing ring 3 while minimizing the insertion resistance of the sealing ring 3 to the male connector.

[0055] The sealing ring 3 can be made of various materials. In this embodiment, the sealing ring 3 is preferably made of EPDM (ethylene propylene diene monomer rubber) or liquid silicone.

[0056] like Figure 3 , Figure 4 and Figure 5As shown, the connector structure provided in this embodiment also includes an identification element 4, which has a marking layer 40 for identifying the identity of the connector structure; the side wall of the connector housing 1 is provided with a window 13, and the identification element 4 is slidably connected to the inside of the connector housing 1 along the axial direction of the connector housing 1. When a matching element is inserted into the connector housing 1, the identification element 4 is moved along the axial direction of the connector housing 1 under the push of the matching element, so as to move the marking layer 40 to the window 13.

[0057] When the male connector is not inserted into the female connector, the identification element 4 is obscured by the connector housing 1, preventing the display of the marking layer 40 used to identify the connector structure. However, when the male connector is inserted into the female connector, the identification element 4 is pushed by the protrusion on the outer wall of the male connector and moves along the axial direction of the connector housing 1 towards the window 13 as the male connector is inserted. Once the male connector is fully inserted, the marking layer 40 on the identification element 4 moves to the window 13 and is exposed through the window 13, thereby displaying the identification information of the connector structure.

[0058] The label layer 40 can be a QR code. When it moves to window 13, staff can scan the label layer 40 to learn the identity information of the connector structure.

[0059] like Figure 4 and Figure 6 As shown, the side wall of the connector housing 1 that is slidably connected to the marking member 4 is a blocking part 14. The blocking part 14 is provided with a blocking hole 140. The side of the marking member 4 facing the blocking part 14 is provided with a limiting protrusion 41. The limiting protrusion 41 is used to extend into the blocking hole 140 and abut against the inner wall of the blocking hole 140 when the marking layer 40 moves to the window 13.

[0060] The limiting protrusion 41 can cooperate with the blocking hole 140 to continue moving or move in the opposite direction due to external interference after the marker layer 40 moves to the window 13, thereby ensuring the positional stability of the marker layer 40 at the window 13.

[0061] Furthermore, the side of the limiting protrusion 41 facing the blocking part 14 is a slope, and the slope is inclined from the side closer to the opponent to the side farther away from the opponent towards the central axis of the connector housing 1.

[0062] The inclined surface can guide the movement of the limiting protrusion 41 into the blocking hole 140 during the process of the marking part 4 being pushed and moved by the male connector, making it easier for the limiting protrusion 41 to enter the blocking hole 140.

[0063] like Figure 6 As shown, there can be multiple blocking holes 140, which are distributed at intervals along the axial direction of the connector housing 1. The limiting protrusion 41 is used to sequentially extend into the multiple blocking holes 140 when the marking piece 4 is pushed by the hand piece.

[0064] The multiple blocking holes 140 can not only effectively control the movement of the marker 4, but also cooperate with each other to increase the resistance of the limiting protrusion 41 during its movement, thereby preventing the limiting protrusion 41 from automatically moving closer to the window 13 under external force interference and affecting the stability of the marker 4.

[0065] like Figure 4 As shown, there are multiple limiting protrusions 41, which are distributed at intervals along the axial direction of the connector housing 1, and the interval between any two adjacent limiting protrusions 41 is equal to the distance between any two adjacent blocking holes 140.

[0066] Multiple limiting protrusions 41 can cooperate with multiple blocking holes 140 to further enhance their limiting effect on the marker 4.

[0067] This embodiment also provides a pipeline assembly, which includes the aforementioned connector structure, and may further include the aforementioned male connector. Since the pipeline assembly includes the aforementioned connector structure, it solves the same technical problem and achieves the same technical effect as the aforementioned connector structure, and will not be described in detail here.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A connector structure, characterized in that, Includes connector housing (1) and U-shaped clamp (2); The connector housing (1) has limiting holes (10) extending circumferentially along both sides. The clamp (2) includes two clamping legs (20) and a connecting rod (21) connecting the two clamping legs (20). The clamp (2) is clamped onto the connector housing (1) through the limiting holes (10), and the positions of the two clamping legs (20) corresponding to the limiting holes (10) extend into the interior of the connector housing (1) through the two limiting holes (10). Both of the two clamping legs (20) are provided with hooks (22) extending axially along the connector housing (1) at their ends away from the connecting rod (21), and the hooks (22) abut against the outer wall of the connector housing (1) on the side away from the connecting rod (21). The outer wall of the connector housing (1) is provided with a lifting protrusion (11) at a position corresponding to the connecting rod (21). The lifting protrusion (11) abuts against the side of the connecting rod (21) near the clamping leg (20) to extend the length of the clamping leg (20) between the connecting rod (21) and the clamping hook (22).

2. The joint structure according to claim 1, characterized in that, The lifting protrusion (11) is provided with a limiting groove (110) extending circumferentially along the connector housing (1), and the connecting rod (21) is located in the limiting groove (110).

3. The joint structure according to claim 2, characterized in that, There are two limiting grooves (110), which are distributed circumferentially along the connector housing (1), and the ends of the two limiting grooves (110) that are far apart from each other are connected to the two limiting holes (10).

4. The joint structure according to claim 3, characterized in that, It also includes a sealing ring (3); The connector housing (1) includes a plug end (12) for inserting a pair of parts, and the sealing ring (3) is disposed inside the connector housing (1) and located on the side of the clip (2) away from the plug end (12); The sealing ring (3) has an annular groove (30) extending circumferentially on the side facing the clip (2) and / or the side facing away from the clip.

5. The joint structure according to any one of claims 1-4, characterized in that, It also includes an identification element (4), which has a marking layer (40) for identifying the identity of the connector structure. The side wall of the connector housing (1) is provided with a window (13). The marking member (4) is slidably connected to the inside of the connector housing (1) along the axial direction of the connector housing (1). The marking member (4) is used to move along the axial direction of the connector housing (1) under the push of the counter piece when a counter piece is inserted in the connector housing (1), so as to drive the marking layer (40) to move to the window (13).

6. The joint structure according to claim 5, characterized in that, The side wall of the connector housing (1) that is slidably connected to the marking member (4) is a shielding part (14). The shielding part (14) is provided with a blocking hole (140). The marking member (4) is provided with a limiting protrusion (41) on the side facing the shielding part (14). The limiting protrusion (41) is used to extend into the blocking hole (140) and abut against the inner wall of the blocking hole (140) when the marking layer (40) moves to the window (13).

7. The joint structure according to claim 6, characterized in that, The side of the limiting protrusion (41) facing the blocking part (14) is a slope, and the slope is inclined from the side close to the opponent to the side away from the opponent toward the central axis of the connector housing (1).

8. The joint structure according to claim 7, characterized in that, There are multiple blocking holes (140), and the multiple blocking holes (140) are distributed at intervals along the axial direction of the connector housing (1). The limiting protrusion (41) is used to extend into the multiple blocking holes (140) in sequence when the marking member (4) is pushed by the hand member.

9. The joint structure according to claim 8, characterized in that, There are multiple limiting protrusions (41), and the multiple limiting protrusions (41) are distributed at intervals along the axial direction of the connector housing (1), and the interval between any two adjacent limiting protrusions (41) is equal to the distance between any two adjacent blocking holes (140).

10. A piping assembly, characterized in that, Includes the connector structure as described in any one of claims 1-9.

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