Quick-insertion female connector and quick-insertion structure

Abstract

The utility model provides a quick-insertion female connector and a quick-insertion structure, which belong to the technical field of pipeline connectors and comprise a metal pipe body and a plastic insertion part, one end of the metal pipe body extends into the quick-insertion male connector, and the outer diameter of the metal pipe body is smaller than the inner diameter of the quick-insertion male connector; the plastic inserting part is arranged on the outer wall of the metal pipe body; the plastic inserting part is used for being inserted and limited in the quick-inserting male connector and is in sealed connection with the quick-inserting male connector. The metal pipe body serves as a main body of the quick-insertion female connector, so that the strength of the quick-insertion female connector is improved, and breakage and damage are avoided; the plastic inserting part is arranged on the metal pipe body and is in friction contact with the inner wall of the quick-inserting male connector during assembly, and due to the fact that a plastic material has slight deformation force and can deform in the radial direction when extruded by the quick-inserting male connector, friction between the plastic inserting part and the quick-inserting male connector is reduced, and quick installation of the quick-inserting female connector and the quick-inserting male connector is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline joints, and more specifically relates to a quick-insert female joint and a quick-insert structure. Background Art

[0002] The quick-connect structure is widely used in various fields. In order to ensure production efficiency, the pipelines of two components are mostly connected by the quick-connect structure. The quick-connect structure generally includes a male connector and a female connector, and the female connector is inserted into the inner part of the male connector.

[0003] In the prior art, quick-connect structures are divided into two types according to the material, namely metal quick-connect structures and plastic quick-connect structures. The metal quick-connect structure has high strength, but the friction of the metal material is large, which makes the female connector and the male connector have high resistance when assembled, and there is a problem of difficulty in installation. The plastic quick-connect structure is light in weight, but the strength is not satisfactory, and it is easy to be damaged during use and installation, especially the thin wall is prone to breakage, resulting in connection failure. Utility Model Content

[0004] The utility model aims to provide a quick-insert female connector and a quick-insert structure, aiming to solve the technical problems in the prior art that the quick-insert structure made of metal has large friction resistance during plug-in assembly and is difficult to install, and the quick-insert structure made of plastic has poor strength and is easy to be damaged.

[0005] To achieve the above objectives, in a first aspect, an embodiment of the utility model provides a quick-insert female connector, comprising:

[0006] A metal tube body, one end of which is used to extend into the quick-insert male connector, and the outer diameter of which is smaller than the inner diameter of the quick-insert male connector;

[0007] The plastic plug-in part is arranged on the outer wall of the metal tube body; the plastic plug-in part is used for plugging into the quick-insert male connector and is sealed and connected with the quick-insert male connector.

[0008] In combination with the first aspect, in a possible implementation manner, the plastic plug-in portion includes:

[0009] a first semi-ring body; and

[0010] The second semi-ring body is buckled and connected with the first semi-ring body, and forms a limiting cavity with the first semi-ring body; the limiting cavity is tightly sleeved on the metal tube body.

[0011] In some embodiments, one side edge of the first semi-ring body is provided with a first connecting edge protruding outward, and one side edge of the second semi-ring body is provided with a second connecting edge protruding outward; the first connecting edge is connected to the second connecting edge.

[0012] In some embodiments, the outward protrusion length of the first connecting edge is equal to the outward protrusion length of the second connecting edge, and the thickness of the first connecting edge is equal to the thickness of the second connecting edge;

[0013] Wherein, the outward protruding length of the first connecting edge is 2-3 times the thickness of the first connecting edge.

[0014] In some embodiments, a plurality of snap-fit ​​blocks are disposed on the snap-fit ​​surface of the first semi-ring body, and a snap-fit ​​groove corresponding to and snap-fitting with the plurality of snap-fit ​​blocks is disposed on the snap-fit ​​surface of the second semi-ring body.

[0015] In combination with the first aspect, in a possible implementation manner, the metal tube body includes:

[0016] An end portion is inserted into the interior of the quick-insert male connector;

[0017] a connecting portion, connected to the end portion in sequence along the axial direction of the end portion and coaxial with the end portion; the outer diameter of the connecting portion is smaller than the outer diameter of the end portion; and

[0018] A ring platform, arranged on the connecting part;

[0019] The plastic plug-in part is tightly sleeved on the connecting part; a limiting ring groove is also provided on the inner wall of the plastic plug-in part, and the ring platform is embedded and limited in the limiting ring groove.

[0020] In some embodiments, a positioning block is provided on the groove wall of the limiting ring groove, a positioning groove is provided on the outer wall of the ring platform, and the positioning block is embedded in the positioning groove.

[0021] In some embodiments, the inner wall of the plastic plug-in portion is further provided with limiting teeth extending and distributed in the circumferential direction, and the limiting teeth abut against the outer wall of the connecting portion.

[0022] The beneficial effects of the quick-insert female connector provided by the utility model are as follows: compared with the prior art, the quick-insert female connector of the utility model uses a metal tube body as the main body of the quick-insert female connector to increase the self-strength of the quick-insert female connector and avoid breakage and damage; the plastic plug-in portion is arranged on the metal tube body and, during assembly, is in frictional contact with the inner wall of the quick-insert male connector. Since the plastic material has a slight deformation force, it can be radially deformed by being squeezed by the quick-insert male connector, thereby reducing the friction with the quick-insert male connector, so as to achieve rapid installation of the quick-insert female connector and the quick-insert male connector.

[0023] In a second aspect, the embodiment of the utility model further provides a quick-insertion structure, comprising:

[0024] Quick-connect male connector;

[0025] The quick-connect female connector described above; and

[0026] A sealing structure is sealingly connected between the quick-insert male connector and the quick-insert female connector.

[0027] In combination with the second aspect, in a possible implementation, the sealing structure includes a sealing ring and a bushing arranged at intervals along the axial direction of the quick-insert male connector;

[0028] The sealing ring is located between the metal tube body and the quick-insert male connector;

[0029] The plastic plug-in portion has a plug-in end surface facing the end of the metal tube body, and the plug-in end surface is a conical surface, and the bushing is located between the plug-in end surface and the quick-insert male connector;

[0030] A clamping ring groove is also provided on the outer peripheral wall of the plastic plug-in part, and a spring piece is provided inside the quick-insertion male connector; the spring piece is located in the clamping ring groove.

[0031] The quick-insert structure provided by the utility model can improve the strength of the quick-insert structure itself and reduce the installation friction force due to the adoption of the quick-insert female connector mentioned above, thereby realizing the quick installation of the quick-insert female connector and the quick-insert male connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a quick-insert female connector provided in an embodiment of the utility model;

[0034] Figure 2 A schematic structural diagram of a plastic plug-in portion of a quick-insert female connector provided in an embodiment of the utility model;

[0035] Figure 3 A schematic diagram of the matching structure of the metal tube body and the first half ring body of the quick-insert female connector provided in an embodiment of the utility model;

[0036] Figure 4 A schematic cross-sectional view of a quick-insert structure provided in an embodiment of the utility model.

[0037] In the figure:

[0038] 1. Metal tube body; 11. End portion; 12. Connecting portion; 13. Ring platform; 131. Positioning groove;

[0039] 2. Plastic plug-in part; 21. First half ring body; 211. First connecting edge; 212. Snap-in block; 22. Second half ring body; 221. Second connecting edge; 222. Snap-in groove; 23. Positioning cavity; 24. Positioning ring groove; 241. Positioning block; 25. Positioning teeth; 26. Plug-in end face; 27. Snap-in ring groove;

[0040] 3. Quick-insert male connector; 31. Spring clip;

[0041] 4. Sealing structure; 41. Sealing ring; 42. Bushing. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] Please also read Figure 1 and Figure 4The quick-insert female connector provided by the utility model is now described. The quick-insert female connector comprises a metal tube body 1 and a plastic plug-in portion 2. One end of the metal tube body 1 extends into the quick-insert male connector 3, and the outer diameter of the extending end of the metal tube body 1 is smaller than the inner diameter of the quick-insert male connector 3. Preferably, there is a sealing gap between the two, and a sealing ring 41 is provided in the sealing gap. The plastic plug-in portion 2 is arranged on the outer wall of the metal tube body 1; the plastic plug-in portion 2 is used for inserting and limiting in the quick-insert male connector 3, and is sealed and connected with the quick-insert male connector 3.

[0047] It should be noted that the quick-insert female connector is used to be inserted and matched with the quick-insert male connector 3 to achieve rapid assembly between the pipelines of the two components. Specifically, the metal tube body 1 is used to connect with the pipeline of one of the components. The metal tube body 1 can be a straight tube or a curved tube. The specific shape depends on the installation position and installation space of the two components. In addition, the metal tube body 1 can also be the pipeline of the component itself, but the plastic plug-in part 2 is fixedly set at the end of the pipeline. Of course, the quick-insert female connector can also be an independent part. Preferably, the metal tube body 1 is a standard part.

[0048] The quick-insert male connector 3 is connected to the pipeline of another component. The quick-insert male connector 3 can be made of metal or plastic. The specific material depends on the pipeline of the component and the connection strength requirements. The quick-insert male connector 3 is generally installed at the end of the pipeline, and the inner wall of the quick-insert male connector 3 is provided with a sealing structure 4, such as a sealing ring 41. After the quick-insert male connector 3 and the quick-insert female connector are assembled, the sealing structure 4 is arranged between the quick-insert male connector 3 and the quick-insert female connector to seal the gap between the two and prevent the material in the pipeline from leaking out from the connection between the quick-insert male connector 3 and the quick-insert female connector.

[0049] The plastic plug-in part 2 is made of plastic material as a whole, so the plastic plug-in part 2 has a slight elastic deformation ability and will deform slightly when squeezed by the outside world, thus avoiding friction and hard contact.

[0050] When assembling the quick-insert female connector and the quick-insert male connector 3, one end of the metal tube body 1 and the plastic plug-in portion 2 are inserted into the inner cavity of the quick-insert male connector 3. Since the outer diameter of the inserted end of the metal tube body 1 is smaller than the inner diameter of the quick-insert male connector 3, there is a sealing gap between the two, so the inserted end of the metal tube body 1 will not contact the inner wall of the quick-insert male connector 3, and the two will not rub against each other, and there is no insertion resistance. Only the plastic plug-in portion 2 axially rubs against the inner wall of the quick-insert male connector 3 and the sealing structure 4, and the plastic plug-in portion 2 has a slight elastic deformation ability, and will be radially deformed when squeezed by the quick-insert male connector 3 and the sealing structure 4, so as to reduce the friction resistance during assembly.

[0051] It should be noted that since the sealing structure 4 is generally made of rubber material with large surface roughness, and the sealing structure 4 protrudes radially inward relative to the quick-insert male connector 3, the friction resistance during the assembly of the quick-insert female connector and the quick-insert male connector 3 mainly comes from the sealing structure 4, and is not greatly affected by the material of the quick-insert male connector 3. Therefore, when selecting the material of the quick-insert male connector 3, there is no need to give priority to the influence of the plug-in friction with the quick-insert female connector.

[0052] It should also be noted that, since the plastic plug-in part 2 is in frictional contact with the inner wall of the quick-insert male connector 3 and the sealing structure 4, in order to avoid leakage at the plug-in part, the plastic plug-in part 2 cannot move relative to the metal tube body 1 and the quick-insert male connector 3. Therefore, the plastic plug-in part 2 must be fixedly set on the metal tube body 1. Specifically, the plastic plug-in part 2 can be an annular structure tightly sleeved on the outer wall of the metal tube body 1, or it can be a block structure fixed to the metal tube body 1 by fasteners or adhesive. This embodiment does not limit the specific shape and fixing method of the plastic plug-in part 2, as long as it can be fixed on the metal tube body 1 and does not move.

[0053] Compared with the prior art, the quick-insert female connector provided by the utility model has a metal tube body 1 as the main body of the quick-insert female connector to increase the self-strength of the quick-insert female connector to avoid breakage and damage; the plastic plug-in portion 2 is arranged on the metal tube body 1, and during assembly, it is in friction contact with the inner wall of the quick-insert male connector 3. Since the plastic material has a slight deformation force, it can be radially deformed by being squeezed by the quick-insert male connector 3, thereby reducing the friction with the quick-insert male connector 3, so as to achieve rapid installation of the quick-insert female connector and the quick-insert male connector 3.

[0054] In some embodiments, the plastic plug-in portion 2 may be formed as follows: Figure 1 and Figure 3 The structure shown, see Figure 1 and Figure 3 The plastic plug-in part 2 includes a first half ring body 21 and a second half ring body 22. The second half ring body 22 is connected to the first half ring body 21 by buckling, and forms a limiting cavity 23 with the first half ring body 21; the limiting cavity 23 is tightly sleeved on the metal tube body 1.

[0055] The outer surface structure of the first semi-ring body 21 is the same as the outer surface structure of the second semi-ring body 22. Therefore, after the first semi-ring body 21 and the second semi-ring body 22 are buckled, an annular columnar structure is formed, and the outer surface of the annular columnar structure radially abuts against the inner wall of the quick-insert male connector 3 and the sealing structure 4.

[0056] Since the outer surface structure of the first half ring body 21 is the same as the outer surface structure of the second half ring body 22, it is not necessary to align the quick-insert female connector with the quick-insert male connector 3 in radial direction during assembly, thus simplifying the assembly operation.

[0057] Since the first semi-ring body 21 and the second semi-ring body 22 are both semi-ring structures, the two can form a limiting cavity 23 after being buckled, and the limiting cavity 23 is axially continuous. The inner surface structure of the first semi-ring body 21 is the same as the inner surface structure of the second semi-ring body 22, or there are only slight differences, as long as the limiting cavity 23 formed after the two are buckled is compatible with the outer structure of the metal tube body 1, so that the limiting cavity 23 is tightly sleeved on the metal tube body 1.

[0058] The first semi-ring body 21 and the second semi-ring body 22 are detachably connected. Specifically, the first semi-ring body 21 and the second semi-ring body 22 can be bonded to each other by gluing, or the first semi-ring body 21 and the second semi-ring body 22 can be bonded to the outer wall of the metal tube body 1 respectively; or at least one of a fastener, a snap-on structure or a plug-in structure can be used to connect the first semi-ring body 21 and the second semi-ring body 22. It should be noted that the fastener, the snap-on structure or the plug-in structure should be set at the snap-on position of the first semi-ring body 21 and the second semi-ring body 22 to avoid affecting the seal between the first semi-ring body 21, the second semi-ring body 22 and the quick-insert male connector 3.

[0059] The plastic plug-in part 2 is a split structure, which is divided into a first half ring body 21 and a second half ring body 22 which are arranged in a buckled manner. Compared with the integral structure, the split structure is easy to assemble with the metal pipe body 1 and is easy to process and manufacture.

[0060] In some embodiments, the first half ring 21 and the second half ring 22 may be connected by Figure 3 The structure shown, see Figure 3 A first connecting edge 211 protruding outward is provided on one side edge of the first semi-ring body 21 , and a second connecting edge 221 protruding outward is provided on one side edge of the second semi-ring body 22 ; the first connecting edge 211 is connected to the second connecting edge 221 .

[0061] The first connecting edge 211 is connected to the second connecting edge 221, preferably connected by an edge line, that is, the first connecting edge 211 and the second connecting edge 221 share the same edge line. The connection between two plastic parts sharing the same edge line belongs to the prior art and can be formed by mold injection molding, and can ensure that the connection will not be disconnected.

[0062] The first connecting edge 211 and the second connecting edge 221 are inseparable, which is equivalent to the first connecting edge 211 and the second connecting edge 221 forming a hinge structure. On the one hand, it is convenient for the first semi-ring body 21 and the second semi-ring body 22 to be installed in a buckled manner. On the other hand, it also allows a connection between the first semi-ring body 21 and the second semi-ring body 22. During transportation and installation, the first semi-ring body 21 and the second semi-ring body 22 will not be lost or installed incorrectly.

[0063] It should be noted that, since the first half ring body 21 and the second half ring body 22 need to be plugged into the quick-insert male connector 3, the outward protruding length of the first connecting edge 211 and the thickness of the first connecting edge 211 cannot be too large. Similarly, the outward protruding length of the second connecting edge 221 and the thickness of the second connecting edge 221 cannot be too large.

[0064] See also Figure 3 On the basis of the above embodiment, the outward protruding length of the first connecting edge 211 is equal to the outward protruding length of the second connecting edge 221, and the thickness of the first connecting edge 211 is equal to the thickness of the second connecting edge 221, that is, the structure of the first connecting edge 211 is completely the same as the structure of the second connecting edge 221. The outward protruding length of the first connecting edge 211 is 2-3 times the thickness of the first connecting edge 211.

[0065] The first connecting edge 211 and the second connecting edge 221 mainly serve to connect the first semi-ring body 21 and the second semi-ring body 22 to achieve the opening and closing between the first semi-ring body 21 and the second semi-ring body 22. Therefore, the size of the first connecting edge 211 and the second connecting edge 221 is very important. If the length is too large or the thickness is too large, it cannot achieve a good seal with the quick-insert male connector 3. Moreover, if the thickness is too large, there is still a problem of poor opening and closing of the first semi-ring body 21 and the second semi-ring body 22. Therefore, the length of the first connecting edge 211 protruding outward is 2-3 times the thickness of the first connecting edge 211.

[0066] In some embodiments, the first half ring 21 and the second half ring 22 may also be connected by Figure 3 The structure shown, see Figure 3 A plurality of snap-fit ​​blocks 212 are disposed on the buckling surface of the first half ring body 21 , and a snap-fit ​​groove 222 corresponding to and snap-fitting with the plurality of snap-fit ​​blocks 212 is disposed on the buckling surface of the second half ring body 22 .

[0067] The clamping blocks 212 and the corresponding clamping grooves 222 are in interference fit, and a plurality of clamping blocks 212 are relatively evenly distributed on the buckling surface of the first semi-ring body 21. The structures of the clamping blocks 212 can be the same, or they can be designed to have different structures according to the connection positions.

[0068] It should be noted that after the first half ring body 21 and the second half ring body 22 are snap-fitted and tightly sleeved onto the metal tube body 1, the first half ring body 21 and the second half ring body 22 do not need to be opened again, so the clamping block 212 and the clamping groove 222 only need to be assembled once.

[0069] The snap-fitting block 212 and the snap-fitting groove 222 form a snap-fitting structure. The snap-fitting block 212 is embedded in the snap-fitting groove 222 to realize the snap-fitting connection between the first semi-ring body 21 and the second semi-ring body 22, so that the annular column composed of the first semi-ring body 21 and the second semi-ring body 22 is tightly sleeved on the metal tube body 1 without the need for additional connection operations, thereby simplifying the assembly operation of the plastic plug-in part 2 and the metal tube body 1.

[0070] In order to improve the connection stability between the clamping block 212 and the clamping slot 222, preferably, the clamping block 212 has a spherical structure, the slot opening of the clamping slot 222 is a circular opening adapted to the spherical structure, and the slot sidewall of the clamping slot 222 is an arc surface or a plane, or a combination of an arc surface and a plane. The inner diameter of the clamping slot 222 is smaller than the outer diameter of the spherical structure. When the spherical structure is placed in the clamping slot 222, the spherical structure abuts against each sidewall of the clamping slot 222, thereby forming a limit in multiple directions to prevent the first semi-ring body 21 from being separated from the second semi-ring body 22.

[0071] The snap-fit ​​block 212 is designed with a spherical structure, which is convenient for passing through the notch of the snap-fit ​​groove 222 without manual alignment, so that the snap-fit ​​block 212 is convenient for being snap-fitted and limited in the snap-fit ​​groove 222. Moreover, the spherical structure can also form a limit in multiple directions with the snap-fit ​​groove 222 to improve the snap-fit ​​strength.

[0072] In some embodiments, the metal tube 1 may be Figure 2 The structure shown, see Figure 2 The metal tube body 1 includes an end portion 11, a connecting portion 12 and an annular platform 13. The end portion 11 is inserted into the interior of the quick-insert male connector 3; the connecting portion 12 is sequentially connected to the end portion 11 along the axial direction of the end portion 11 and is coaxial with the end portion 11; the outer diameter of the connecting portion 12 is smaller than the outer diameter of the end portion 11; and the annular platform 13 is arranged on the connecting portion 12.

[0073] The end portion 11 extends into the interior of the quick-insert male connector 3 to increase the axial connection length between the quick-insert female connector and the quick-insert male connector 3. If in the axial direction of the metal tube 1, the insertion direction of the metal tube 1 is taken as the front, it can be understood that the end portion 11 is located in front of the connecting portion 12, and the front end outer wall of the end portion 11 can also abut against the inner wall of the quick-insert male connector 3, such as Figure 4 In addition, a sealing ring 41 is provided between the end portion 11 and the inner wall of the quick-insert male connector 3 to seal the sealing gap between the end portion 11 and the quick-insert male connector 3 .

[0074] The plastic plug-in part 2 is tightly sleeved on the connecting part 12; in addition, a limiting ring groove 24 is also provided on the inner wall of the plastic plug-in part 2, and the ring platform 13 is embedded and limited in the limiting ring groove 24. The axial width of the limiting ring groove 24 is adapted to the axial length of the ring platform 13. Preferably, the ring platform 13 and the limiting ring groove 24 are interference fit. Since the plastic plug-in part 2 is formed by the first half ring body 21 and the second half ring body 22 being buckled and butted, and is not directly sleeved on the metal tube body 1, it can be ensured that the limiting ring groove 24 is buckled outside the ring platform 13.

[0075] An annular platform 13 is added to the connecting portion 12, and a limiting annular groove 24 is provided on the inner wall of the plastic plug-in portion 2, so that the annular platform 13 cooperates with the limiting annular groove 24 to limit the plastic plug-in portion 2 in the axial direction, thereby preventing the plastic plug-in portion 2 from axially moving relative to the metal tube body 1, thereby increasing the connection stability between the plastic plug-in portion 2 and the metal tube body 1.

[0076] In addition to the axial cooperation between the ring platform 13 and the limiting ring groove 24, the end of the plastic plug part 2 is also axially abutted with the transitional connection between the end head 11 and the connecting part 12. Specifically, the transitional connection between the end head 11 and the connecting part 12 is a conical structure, and the outer wall surface of the conical structure is a conical surface that shrinks inward from front to back. The front end of the plastic plug part 2 abuts against the conical surface of the conical structure, thereby forming a limit in the axial direction of the metal tube body 1, further preventing the plastic plug part 2 from moving forward axially.

[0077] It should be noted that the “front” and “rear” defined above are in the axial direction of the metal tube 1 , with the insertion direction of the metal tube 1 being the front and the opposite direction of the insertion direction being the rear.

[0078] In some embodiments, the metal tube body 1 and the plastic plug-in portion 2 may also be connected by Figure 2 and Figure 3 The structure shown, see Figure 2 and Figure 3 A positioning block 241 is provided on the groove wall of the limiting ring groove 24 , a positioning groove 131 is provided on the outer wall of the ring platform 13 , and the positioning block 241 is embedded in the positioning groove 131 .

[0079] The groove wall structure of the positioning groove 131 is adapted to the outer shape structure of the positioning block 241. When assembling the plastic plug-in part 2 and the metal pipe body 1, the positioning groove 131 needs to be aligned with the positioning block 241 so that the positioning block 241 can be limited in the positioning groove 131. After the two are embedded, the positioning block 241 is limited by the positioning groove 131, so that the plastic plug-in part 2 and the metal pipe body 1 cannot move radially.

[0080] A positioning groove 131 is provided on the ring platform 13, and a positioning block 241 is additionally provided in the limiting ring groove 24, so that the positioning block 241 cooperates with the positioning groove 131, and can limit the plastic plug-in part 2 in the radial direction, thereby preventing the plastic plug-in part 2 from moving radially relative to the metal tube body 1, thereby increasing the connection stability between the plastic plug-in part 2 and the metal tube body 1.

[0081] Preferably, the positioning block 241 is a hemispherical structure, and the groove wall of the positioning groove 131 is a hemispherical structure.

[0082] Of course, the positions of the positioning block 241 and the positioning groove 131 can also be interchanged, that is, the positioning groove 131 is set on the groove wall of the limiting ring groove 24, and the positioning block 241 is set on the ring stage 13. Of course, the positions of the positioning groove 131 and the positioning block 241 can also be changed, so that the positioning block 241 is set on the connecting portion 12 and the positioning groove 131 is set on the cavity wall of the limiting cavity 23, or the positioning block 241 is set on the cavity wall of the limiting cavity 23 and the positioning groove 131 is set on the connecting portion 12.

[0083] In order to further increase the radial stability of the plastic plug-in portion 2 and the metal tube body 1, in some embodiments, the inner wall of the plastic plug-in portion 2 is further provided with limiting teeth 25 extending and distributed along the circumferential direction, such as Figure 3 As shown, the limiting teeth 25 abut against the outer wall of the connecting portion 12 .

[0084] It should be noted that the first half ring body 21 and the second half ring body 22 are both provided with the above-mentioned limiting teeth 25, and the limiting teeth 25 are located behind the limiting ring groove 24, close to the rear end of the plastic plug-in part 2. The limiting teeth 25 abut against the outer wall of the connecting part 12, which can increase the radial friction force and further prevent the plastic plug-in part 2 from radially displacing relative to the metal tube body 1.

[0085] Based on the same inventive concept, an embodiment of the present application further provides a quick-insert structure, including a quick-insert male connector 3 , the quick-insert female connector described above, and a sealing structure 4 .

[0086] The quick-insert female connector includes a metal tube body 1 and a plastic plug-in portion 2. One end of the metal tube body 1 extends into the quick-insert male connector 3, and the outer diameter of the extending end of the metal tube body 1 is smaller than the inner diameter of the quick-insert male connector 3. Preferably, there is a sealing gap between the two, and the sealing structure 4 is located in the above-mentioned sealing gap. The plastic plug-in portion 2 is arranged on the outer wall of the metal tube body 1; the plastic plug-in portion 2 is used for plugging into the quick-insert male connector 3 and is sealed and connected to the quick-insert male connector 3. The plastic plug-in portion 2 is made of plastic material as a whole, so the plastic plug-in portion 2 has a slight elastic deformation ability, and will be slightly deformed when squeezed by the outside to avoid friction and hard contact.

[0087] It should be noted that the quick-insert female connector is used to be inserted and matched with the quick-insert male connector 3 to achieve rapid assembly between the pipelines of the two components. Specifically, the metal pipe body 1 is used to connect with the pipeline of one component, and the quick-insert male connector 3 is connected with the pipeline of the other component. The quick-insert male connector 3 can be made of metal or plastic. The specific material depends on the pipeline of the component and the connection strength requirements. The quick-insert male connector 3 is generally installed at the port of the pipeline, and the sealing structure 4 is located in the quick-insert male connector 3.

[0088] After the quick-insert male connector 3 and the quick-insert female connector are assembled, the sealing structure 4 is arranged between the quick-insert male connector 3 and the quick-insert female connector to seal the gap between the two to prevent the material in the pipeline from leaking out from the connection between the quick-insert male connector 3 and the quick-insert female connector.

[0089] When assembling the quick-insert female connector and the quick-insert male connector 3, one end of the metal tube body 1 and the plastic plug-in portion 2 are inserted into the inner cavity of the quick-insert male connector 3. Since the outer diameter of the inserted end of the metal tube body 1 is smaller than the inner diameter of the quick-insert male connector 3, there is a sealing gap between the two, so the inserted end of the metal tube body 1 will not contact the inner wall of the quick-insert male connector 3, and the two will not rub against each other, and there is no insertion resistance. Only the plastic plug-in portion 2 axially rubs against the inner wall of the quick-insert male connector 3 and the sealing structure 4, and the plastic plug-in portion 2 has a slight elastic deformation ability, and will be radially deformed when squeezed by the quick-insert male connector 3 and the sealing structure 4, so as to reduce the friction resistance during assembly.

[0090] Since the sealing structure 4 is generally made of rubber material with large surface roughness, and the sealing structure 4 protrudes radially inward relative to the quick-insert male connector 3, the friction resistance during assembly of the quick-insert female connector and the quick-insert male connector 3 mainly comes from the sealing structure 4, and is not greatly affected by the material of the quick-insert male connector 3. Therefore, when selecting the material of the quick-insert male connector 3, there is no need to give priority to the influence of the plug-in friction with the quick-insert female connector.

[0091] Compared with the prior art, the quick-insertion structure provided by the utility model adopts a metal tube body 1 as the main body of the quick-insertion female connector to increase the self-strength of the quick-insertion female connector to avoid breakage and damage; the plastic plug-in portion 2 is arranged on the metal tube body 1, and during assembly, it is in friction contact with the inner wall of the quick-insertion male connector 3. Since the plastic material has a slight deformation force, it can be radially deformed by being squeezed by the quick-insertion male connector 3 and the sealing structure 4, thereby reducing the friction with the sealing structure 4, so as to realize the quick installation of the quick-insertion female connector and the quick-insertion male connector 3.

[0092] In some embodiments, the sealing structure 4 may be configured as follows: Figure 4 The structure shown, see Figure 4 The sealing structure 4 includes a sealing ring 41 and a bushing 42 which are arranged at intervals along the axial direction of the quick-insert male connector 3 .

[0093] Specifically, the sealing ring 41 is located between the insertion end of the metal pipe body 1 and the quick-insert male connector 3 , and the sealing ring 41 plays a major sealing role to prevent the material in the pipeline from leaking out from the insertion point between the quick-insert male connector 3 and the quick-insert female connector.

[0094] The plastic plug-in part 2 has a plug-in end face 26 facing the insertion end of the metal tube body 1, and the plug-in end face 26 is a conical surface, and the small diameter end of the conical surface faces the insertion end of the metal tube body 1; the bushing 42 is located between the plug-in end face 26 and the quick-insert male connector 3, and the bushing 42 plays a role of further sealing and shock absorption.

[0095] In addition, in order to increase the connection stability between the quick-insert male connector 3 and the quick-insert female connector, a spring sheet 31 is provided inside the quick-insert male connector 3. The spring sheet 31 is an annular structure. A snap ring groove 27 is provided on the outer wall of the plastic plug-in portion 2. When the quick-insert female connector is assembled in place, the spring sheet 31 is limited in the snap ring groove 27, further increasing the connection reliability between the quick-insert male connector 3 and the quick-insert female connector.

[0096] It should be noted that the snap ring groove 27 is located behind the plug end face 26. When the quick-insert female connector and the quick-insert male connector 3 are assembled, the plug end face 26 must first pass through the spring sheet 31. Since the spring sheet 31 has elastic deformation ability and can expand outward, and the plug end face 26 is a conical surface and made of plastic material, the resistance is small, so that the plug end face 26 can smoothly pass through the spring sheet 31 without affecting the installation.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A quick-insert female connector, characterized in that: include: A metal tube body (1), one end of which is used to extend into the quick-insert male connector (3), and the outer diameter of which is smaller than the inner diameter of the quick-insert male connector (3); The plastic plug-in portion (2) is arranged on the outer wall of the metal tube body (1); the plastic plug-in portion (2) is used for being inserted into the quick-insert male connector (3) and being sealedly connected to the quick-insert male connector (3).

2. The quick-connect female connector according to claim 1, wherein: The plastic plug-in portion (2) comprises: a first semi-ring body (21); and The second semi-ring body (22) is buckled and connected to the first semi-ring body (21), and forms a limiting cavity (23) with the first semi-ring body (21); the limiting cavity (23) is tightly sleeved on the metal tube body (1).

3. The quick-insert female connector according to claim 2, characterized in that: A first connecting edge (211) protruding outward is provided on one side edge of the first semi-ring body (21), and a second connecting edge (221) protruding outward is provided on one side edge of the second semi-ring body (22); the first connecting edge (211) is connected to the second connecting edge (221).

4. The quick-connect female connector according to claim 3, wherein: The outward protruding length of the first connecting edge (211) is equal to the outward protruding length of the second connecting edge (221), and the thickness of the first connecting edge (211) is equal to the thickness of the second connecting edge (221); Wherein, the outwardly protruding length of the first connecting edge (211) is 2-3 times the thickness of the first connecting edge (211).

5. The quick-insert female connector according to claim 2, characterized in that: A plurality of snap-fit ​​blocks (212) are provided on the snap-fit ​​surface of the first semi-ring body (21), and a snap-fit ​​groove (222) corresponding to and snap-fitting with the plurality of snap-fit ​​blocks (212) is provided on the snap-fit ​​surface of the second semi-ring body (22).

6. The quick-connect female connector according to claim 1, wherein: The metal tube body (1) comprises: An end portion (11) is inserted into the interior of the quick-insert male connector (3); a connecting portion (12) connected to the end portion (11) in sequence along the axial direction of the end portion (11) and coaxial with the end portion (11); the outer diameter of the connecting portion (12) is smaller than the outer diameter of the end portion (11); and A ring platform (13) is arranged on the connecting portion (12); The plastic plug-in portion (2) is tightly sleeved on the connecting portion (12); a limiting ring groove (24) is also provided on the inner wall of the plastic plug-in portion (2), and the ring platform (13) is embedded and limited in the limiting ring groove (24).

7. The quick-connect female connector according to claim 6, wherein: A positioning block (241) is provided on the groove wall of the limiting ring groove (24), a positioning groove (131) is provided on the outer wall of the ring platform (13), and the positioning block (241) is embedded in the positioning groove (131).

8. The quick-connect female connector according to claim 6, wherein: The inner wall of the plastic plug-in portion (2) is also provided with limiting teeth (25) extending and distributed in the circumferential direction, and the limiting teeth (25) abut against the outer wall of the connecting portion (12).

9. A quick-insert structure, characterized in that: include: Quick-connect male connector (3); The quick-connect female connector according to any one of claims 1 to 8; as well as A sealing structure (4) is sealingly connected between the quick-insert male connector (3) and the quick-insert female connector.

10. The quick-insertion structure according to claim 9, characterized in that: The sealing structure (4) comprises a sealing ring (41) and a bushing (42) which are arranged at intervals along the axial direction of the quick-insert male connector (3); The sealing ring (41) is located between the metal tube body (1) and the quick-insert male connector (3); The plastic plug-in portion (2) has a plug-in end surface (26) extending toward the end of the metal tube (1), and the plug-in end surface (26) is a conical surface, and the bushing (42) is located between the plug-in end surface (26) and the quick-insert male connector (3); A snap ring groove (27) is also provided on the outer peripheral wall of the plastic plug-in portion (2), and a spring sheet (31) is provided inside the quick-insert male connector (3); the spring sheet (31) is located inside the snap ring groove (27).

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