Quick connector for connecting male connectors and flexible pipes

Abstract

The present invention provides a quick connector for connecting a male connector and a flexible tube. The quick connector comprises: a first sleeve member, the first sleeve member comprises an outer sleeve and an inner sleeve coaxially arranged in an axial direction, the outer sleeve and the inner sleeve are separately formed parts and connected to each other, and the flexible tube is suitable for being inserted in the axial direction and clamped between the outer sleeve and the inner sleeve; a second sleeve member, the second sleeve member and the first sleeve member are arranged in the axial direction and connected to each other, the second sleeve member is configured to receive the male connector; and a locking member, the locking member is configured to cooperate with the second sleeve member to lock the male connector in the second sleeve member. The quick connector according to the present invention adopts a split structure, is easy to manufacture and has a low production cost.

Description

Technical Field

[0001] The present invention generally relates to the technical field of quick connectors, and in particular to a quick connector for connecting a male connector and a flexible pipe. Background Art

[0002] Quick connectors are usually used to connect pipelines, and have various structural forms. Usually, one end of the quick connector can be directly connected to a first pipeline, and the other end is connected to a second pipeline through a male connector, so that the first pipeline and the second pipeline are connected to each other.

[0003] Quick connectors are widely used in the automotive field, for example, they can be used in liquid and / or steam pipelines in vehicles, such as in turbocharging systems. Quick connectors for turbocharging systems need to connect two pressurized fluid pipelines, and the firmness and reliability of the quick connector connection are crucial. At present, quick connectors for turbocharging systems are made of metal materials in one piece, and the production process is complex and difficult, so they have high manufacturing costs. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide an improved quick connector for connecting a male connector and a flexible pipe.

[0005] To this end, the present invention provides a quick connector for connecting a male connector and a flexible tube, the quick connector comprising: a first sleeve member, the first sleeve member comprising an outer sleeve and an inner sleeve coaxially arranged with respect to an axial direction, the outer sleeve and the inner sleeve being separately formed parts and connected to each other, the flexible tube being suitable for being inserted along the axial direction and being clamped between the outer sleeve and the inner sleeve; a second sleeve member, the second sleeve member and the first sleeve member being arranged along the axial direction and connected to each other, the second sleeve member being configured to receive the male connector; and a locking member, the locking member being configured to cooperate with the second sleeve member to lock the male connector in the second sleeve member.

[0006] The quick connector according to the present invention adopts a split structure, which significantly reduces the difficulty of the production process and reduces the production cost compared to an integrated structure.

[0007] According to the above technical concept, the present invention may further include any one or more of the following optional forms.

[0008] In some optional forms, the outer sleeve and the inner sleeve are connected to each other via a connecting structure, in particular an insert-type connecting structure. Preferably, the connecting structure is configured to prevent relative rotation between the outer sleeve and the inner sleeve.

[0009] In some optional forms, the connecting structure includes: a tongue-shaped portion protruding from the circumferential edge of the outer sleeve; and a through hole, which is arranged in the circumferential wall of the inner sleeve and is arranged to allow the tongue-shaped portion to pass through the through hole along the axial direction and be inserted into the inner sleeve, wherein the connecting structure is configured so that: when the tongue-shaped portion is inserted into the inner sleeve, the outer surface of the tongue-shaped portion abuts the inner surface of the circumferential wall of the inner sleeve.

[0010] In some optional forms, the first sleeve member further includes an abutment structure, wherein the abutment structure is configured to cause the inner surface of the outer sleeve to abut against the outer surface of the inner sleeve.

[0011] In some optional forms, the abutment structure includes: a first abutment portion, which is defined by a first annular portion of the circumferential wall of the outer sleeve; and a second abutment portion, which is defined by a second annular portion of the circumferential wall of the inner sleeve; wherein the inner surface of the first abutment portion is suitable for abutting against the outer surface of the second abutment portion.

[0012] In some optional forms, the outer sleeve and the inner sleeve are further coupled to each other by welding.

[0013] In some optional forms, the first sleeve member includes a limiting portion for limiting the position of the flexible tube. By providing the limiting portion, feedback can be given to the installer when the flexible tube is inserted into place. After receiving the feedback, the installer can, for example, further press a portion of the circumferential wall of the inner sleeve toward the outer sleeve to clamp the flexible tube between the inner and outer sleeves.

[0014] In some optional forms, the limiting portion is in the form of a protrusion, which protrudes inwardly from the circumferential wall of the outer sleeve in a radial direction; and / or the limiting portion is in the form of a step surface, which is arranged on the circumferential wall of the inner sleeve.

[0015] In some optional forms, the first sleeve member and the second sleeve member are connected to each other by snap-fitting.

[0016] In some optional forms, the outer sleeve of the first sleeve member includes an annular raised section that bulges outward in the radial direction and extends in the circumferential direction; the second sleeve member includes a second sleeve member body and a plurality of claws extending from the second sleeve member body in the axial direction and spaced apart in the circumferential direction, wherein the plurality of claws are suitable for engaging with the annular raised section.

[0017] In some optional forms, the second sleeve member and the inner sleeve jointly define a receiving channel along the axial direction for receiving the male connector.

[0018] In some optional forms, the locking member is suitable for moving between an unlocked position and a locked position in a direction perpendicular to the axial direction, and the locking member has at least one locking portion, wherein when the locking member is in the unlocked position, the at least one locking portion is positioned outside the receiving channel, and when the male connector is inserted into place in the receiving channel and the locking member is in the locked position, the at least one locking portion is positioned in a circumferential groove on the outside of the male connector to lock the male connector.

[0019] In some optional forms, a Y-shaped sealing ring is provided between the second sleeve member and the inner sleeve to seal the annular gap between the inner sleeve and the male connector. The Y-shaped sealing ring can reduce the insertion resistance of the male connector when it is inserted into the receiving channel, thereby reducing the labor intensity of the installer.

[0020] In some optional forms, the outer sleeve and the inner sleeve are respectively stamped from metal parts, and / or the second sleeve member is injection molded by plastic. The inner and outer sleeves of the first sleeve member for connecting the flexible tube are respectively stamped from metal parts, which effectively reduces the difficulty of the production process and reduces the production cost. The second sleeve member for connecting the male connector is injection molded, which can significantly improve the production efficiency and reduce the production cost.

[0021] The quick connector for connecting the male connector and the flexible tube according to the present invention adopts a split structure, which significantly reduces the difficulty of the production process compared to the integrated structure, and also allows more suitable production processes and materials to be selected for different components, further improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features and advantages of the present invention will be better understood through the following detailed description of the optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar components, wherein:

[0023] Figure 1 is a perspective view of a quick connector and a male connector suitable for connecting with the quick connector according to an exemplary embodiment of the present invention, wherein the male connector and the quick connector are in a connected state;

[0024] Figure 2 yes Figure 1 Exploded view of the quick connector and male connector in the;

[0025] Figure 3A and Figure 3B They are Figure 1 Side and cross-sectional views of the quick connector and male connector in FIG.

[0026] Figure 4A and Figure 4B They are Figure 1 A front view and a cross-sectional view of a first sleeve member of a quick connector;

[0027] FIG. 5A to FIG. 5C They are Figure 4A and Figure 4B A three-dimensional view and a cross-sectional view of the outer sleeve of the first sleeve member in FIG. 1 viewed from two angles;

[0028] Fig. 6A and Figure 6B They are Figure 4A and Figure 4B A perspective view and a front view of an inner sleeve of the first sleeve member in FIG.

[0029] Fig. 7A and Figure 7B They are Figure 1 A three-dimensional view of the second sleeve member and the locking member of the quick connector in FIG. 1 from two angles, wherein the locking member is in a locked position;

[0030] Fig. 8A and Figure 8B They are Figure 1 A front view and a side view of a second sleeve member and a locking member of the quick connector, wherein the locking member is in an unlocked position;

[0031] Fig. 9A and Fig. 9B They are Figure 1 A front view and a side view of a second sleeve member and a locking member of the quick connector, wherein the locking member is in a locked position;

[0032] Fig.10 yes Figure 1 A three-dimensional view of the male connector in FIG.

[0033] Fig.11 yes Figure 1 A three-dimensional view of a locking member of a quick connector in FIG.

[0034] Fig. 12A and Fig. 12B They are applicable to Figure 1 A three-dimensional view and a cross-sectional view of the Y-type sealing ring of the quick connector in FIG. DETAILED DESCRIPTION

[0035] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely exemplary of specific ways to implement and use the invention and are not intended to limit the scope of the invention. When describing the structural positions of the various components, such as up, down, top, bottom, etc., the directional expressions are not absolute, but relative. When the various components are arranged as shown in the figure, these directional expressions are appropriate, but when the positions of the various components in the figure change, these directional expressions also change accordingly.

[0036] In the present invention, the circumferential direction of a cylindrical or annular component refers to the direction along the circumference of the component, the axial direction of the component refers to the direction perpendicular to the circumferential direction of the component, and the radial direction of the component refers to the direction perpendicular to the axial direction of the component.

[0037] Figures 1 to 3B A quick connector 100 according to an exemplary embodiment of the present invention and a male connector 200 suitable for connecting with the quick connector 100 are shown.

[0038] Reference Figures 1 to 3B The quick connector 100 can be used to connect a male connector 200 and a flexible tube (not shown). The quick connector 100 includes: a first sleeve member 102, the first sleeve member 102 includes an outer sleeve 104 and an inner sleeve 106 coaxially arranged with respect to an axial direction A, the outer sleeve 104 and the inner sleeve 106 are separately formed parts and are connected to each other, and the flexible tube is suitable for being inserted and clamped between the outer sleeve 104 and the inner sleeve 106 along the axial direction A; a second sleeve member 108, the second sleeve member 108 and the first sleeve member 102 are arranged along the axial direction A and are connected to each other, the second sleeve member 108 is configured to receive the male connector 200; and a locking member 110, the locking member 110 is configured to cooperate with the second sleeve member 108 to lock the male connector 200 in the second sleeve member 108.

[0039] 4A to 6B The first socket member 102 and the outer sleeve 104 and the inner sleeve 106 that constitute the first socket member 102 are shown.

[0040] Reference FIG. 3B to FIG. 4B , the first sleeve member 102 is configured to be connected to a flexible pipe. In the illustrated embodiment, the first sleeve member 102 may include an outer sleeve 104 and an inner sleeve 106 of a generally cylindrical shape. The outer sleeve 104 and the inner sleeve 106 are two components formed separately. Optionally, the outer sleeve 104 and the inner sleeve 106 can each be stamped from a metal piece. Compared to the existing one-piece structure, the split structure of the outer sleeve 104 and the inner sleeve 106 significantly reduces the difficulty of the production process and reduces the production cost.

[0041] In the illustrated embodiment, the outer sleeve 104 and the inner sleeve 106 are coaxially arranged with respect to the axial direction A and connected to each other. The outer sleeve 104 includes a first outer sleeve end 112 and a second outer sleeve end 114. The inner sleeve 106 includes a first inner sleeve end 116 and a second inner sleeve end 118. The flexible tube is adapted to be inserted and clamped between the first outer sleeve end 112 and the first inner sleeve end 116 along the axial direction A.

[0042] The first sleeve member 102 may also include a limiting portion for limiting the position of the flexible tube. In the illustrated embodiment, the outer sleeve 104 is provided with a first limiting portion in the form of a convex piece 120, which protrudes radially inward from the circumferential wall of the outer sleeve 104. Optionally, the convex piece 120 may be directly punched out from the circumferential wall of the outer sleeve 104 and formed by bending. In the illustrated embodiment, the outer sleeve 104 includes a plurality of convex pieces 120 (e.g., as shown in FIG. 1 ) arranged at intervals in the circumferential direction. Figure 5A In the embodiment shown in the figure, the inner sleeve 106 is provided with a second limiting portion, which is in the form of a step surface (i.e., a first step surface 122), and the first step surface 122 is provided on the circumferential wall of the inner sleeve 106. The first step surface 122 may be the surface of the radial portion 126 of the protruding section 124 of the inner sleeve 106. In the embodiment shown in the figure, the protruding piece 120 and the first step surface 122 together form a limiting portion for limiting the position of the flexible tube. It is understandable that the limiting structure of the flexible tube may be provided on only one of the outer sleeve 104 and the inner sleeve 106.

[0043] In the actual installation process, the flexible tube is first inserted between the first outer sleeve end 112 and the first inner sleeve end 116. After the flexible tube is inserted into place (i.e., the end of the flexible tube abuts the stopper), a special tool is used to press part of the circumferential wall of the inner sleeve 106 toward the outer sleeve 104 to clamp the flexible tube between the inner sleeve 106 and the outer sleeve 104. Figure 5B As shown in FIG. 1 , a plurality of slots 128 are provided on the circumferential wall of the outer sleeve 104 at intervals along the circumferential direction for cooperation with a special tool.

[0044] Continue to refer to Figure 4A and Figure 4B In some embodiments, the outer sleeve 104 and the inner sleeve 106 may be connected to each other via a connection structure, in particular, an interpenetrating connection structure.

[0045] In the illustrated embodiment, the coupling structure may include a tongue portion 130 ( Figure 5C ) and a through hole 132 ( Fig. 6A ).

[0046] Combined with reference Figure 5C, the tongue 130 protrudes from the circumferential edge 134 at the second outer sleeve end 114 of the outer sleeve 104. In the illustrated embodiment, the tongue 130 may include a proximal portion 136 relatively close to the circumferential edge 134 and a distal portion 138 relatively far from the circumferential edge 134. The proximal portion 136 extends toward the center of the outer sleeve 104 at an angle to the axial direction A, and the distal portion 138 extends along the axial direction A, so that the tongue 130 is bent as a whole. Fig. 6A , a through hole 132 is provided in the circumferential wall of the inner sleeve 106 at the second inner sleeve end 118 and is arranged to allow the tongue 130 to be inserted into the inner sleeve 106 through the through hole 132 along the axial direction A. In the illustrated embodiment, the through hole 132 is provided in a frustoconical section 139 of the inner sleeve 106 (whose circumferential wall is angled with the axial direction A), so that the first edge 140 and the second edge 142 of the through hole 132, which are opposite to each other, are at a distance in the radial direction to allow the tongue 130 to pass through the through hole 132 along the axial direction A. As shown in FIG. Figure 4B As shown, when the tongue 130 is inserted into the inner sleeve 106 through the through hole 132, the outer surface of the tongue 130 (specifically, the outer surface of the distal end portion 138 of the tongue 130) can abut the inner surface of the circumferential wall of the inner sleeve 106, so that the outer sleeve 104 and the inner sleeve 106 are connected to each other. In the illustrated embodiment, the outer sleeve 104 may include a plurality of tongues 130 (for example, Figure 5B The outer sleeve 104 and the inner sleeve 106 may be provided with a plurality of through holes 132 (e.g., four through holes 132) spaced apart in the circumferential direction to cooperate with the plurality of tongues 130. Through the interpenetrating connection structure of the outer sleeve 104 and the inner sleeve 106, the outer sleeve 104 and the inner sleeve 106 can support each other, strengthen the overall strength of the first sleeve member 102, and help the first sleeve member 102 to be more stably maintained at the end of the second sleeve member 108 as a whole (the specific holding method will be described in detail below). Secondly, when a special tool is used to squeeze the other end of the inner sleeve 106 opposite to the interpenetrating end, the interpenetrating connection structure can effectively avoid the influence of the squeezing operation on other sections of the inner sleeve 106. On the other hand, the interpenetrating connection structure can prevent the relative rotation between the outer sleeve 104 and the inner sleeve 106, which is more conducive to stably maintaining the flexible tube in the first sleeve member 102.

[0047] Continue to refer to Figure 4BIn some embodiments, the first sleeve member 102 may include an abutment structure configured to abut the inner surface of the outer sleeve 104 against the outer surface of the inner sleeve 106. Optionally, the abutment structure includes a first abutment portion 144 and a second abutment portion 146. The first abutment portion 144 may be defined by a first annular portion of the circumferential wall of the outer sleeve 104. In the illustrated embodiment, the first annular portion may be an axial portion of the concave section 150 of the outer sleeve 104. The second abutment portion 146 may be defined by a second annular portion of the circumferential wall of the inner sleeve 106. In the illustrated embodiment, the second annular portion may be an axial portion of the protruding section 124 of the inner sleeve 106. Wherein, the inner surface of the first abutment portion 144 is adapted to abut against the outer surface of the second abutment portion 146. This abutment structure can also enhance the mutual support between the outer sleeve 104 and the inner sleeve 106 , and can also effectively avoid the influence of the extrusion operation on other sections of the inner sleeve 106 when a special tool is used to extrude the other end of the inner sleeve 106 opposite to the insertion end.

[0048] In addition, if Figure 4A and Figure 4B As shown, in some embodiments, the above-mentioned connecting structure and abutment structure can be used simultaneously. The two structures cooperate with each other to better enhance the overall strength of the first sleeve member 102, prevent the inner sleeve 106 from being deformed unexpectedly due to extrusion, and help to more stably maintain the flexible tube in the first sleeve member 102.

[0049] The above-mentioned connecting structure and abutting structure can be easily formed by a stamping process.

[0050] The outer sleeve 104 and the inner sleeve 106 can also be connected to each other by welding to further strengthen the connection between the outer sleeve 104 and the inner sleeve 106. The welding positions include but are not limited to the abutment between the tongue 130 and the inner sleeve 106 and the abutment between the first abutment 144 and the second abutment 146.

[0051] 7A to 9B and Fig.11 A second socket member 108 and a locking member 110 adapted to cooperate with the second socket member 108 are shown according to an exemplary embodiment of the present invention. Fig.10 An example of a male connector 200 suitable for connection with the second sleeve member 108 is shown. Optionally, the second sleeve member 108 can be, for example, made of plastic injection molding to reduce production costs and improve production efficiency. Optionally, the locking member 110 can be made of metal to obtain a higher locking force to ensure a firm connection between the male connector 200 and the second sleeve member 108.

[0052] Reference Figure 2 , Figure 3B as well as Fig. 7A and Figure 7B In the illustrated embodiment, the first sleeve member 102 and the second sleeve member 108 are connected to each other by snapping. The second sleeve member 108 may include a second sleeve member body 154 and a plurality of claws 156 extending from the second sleeve member body 154 in the axial direction A and spaced apart in the circumferential direction. The free end of each claw 156 may be provided with a protrusion 158 (such as Figure 7B The outer sleeve 104 of the first sleeve member 102 may include an annular raised section 160 ( Figure 5C ). The plurality of claws 156 of the second sleeve member 108 can be engaged with the annular raised section 160 of the outer sleeve 104 .

[0053] like Figure 3B As shown exemplarily, the protrusion 158 of each claw 156 of the second sleeve member 108 can abut against the annular raised section 160, and the circumferential edge 161 at the second inner sleeve end 118 of the inner sleeve 106 can abut against the second sleeve member body 154, so that the first sleeve member 102 and the second sleeve member 108 are connected to each other.

[0054] Combined with reference Figure 3B , Fig. 7A and Fig.10 In the illustrated embodiment, the second sleeve member 108 and the inner sleeve 106 jointly define a receiving channel 162 for receiving the male connector 200 along the axial direction A. The circumferential inner side of the second sleeve member 108 may be provided with a guide recess 164 (see Fig. 7A The outer side of the male connector 200 may be provided with a guide block 202 (see Fig.10 During the insertion of the male connector 200 into the receiving passage 162 , the guide recess 164 may engage with the guide block 202 to determine the installation position of the male connector 200 .

[0055] Reference Fig. 7A and Figure 7B The second sleeve member 108 includes a window 168 that allows the locking piece 110 to partially enter the interior of the second sleeve member 108 and a retaining lug 170 for retaining the locking piece 110. In the illustrated embodiment, the window 168 is provided on the second sleeve member body 154, and the retaining lug 170 protrudes outward from the second sleeve member body 154 and includes a retaining recess 172 and a guide channel 174. The functions of these structures will be described in detail below.

[0056] Reference Fig.11In the illustrated embodiment, the locking member 110 has two symmetrically arranged clamp arms 176. Each clamp arm 176 includes a locking portion 178 for locking the male connector 200. In the illustrated embodiment, each clamp arm 176 includes two locking portions 178, which helps to more securely lock the male connector 200. The locking member 110 also includes two symmetrically arranged retaining arms 180 for retaining the locking member 110 on the second sleeve member 108. Each retaining arm 180 extends perpendicularly to the clamp arm 176 from the free end of the corresponding clamp arm 176.

[0057] The locking member 110 is adapted to move in a direction perpendicular to the axial direction A between an unlocked position and a locked position.

[0058] Reference Fig. 8A and Figure 8B When the locking member 110 is in the unlocked position, the retaining arm 180 of the locking member 110 engages with the retaining recess 172 on the second sleeve member 108, so that the locking member 110 can be retained on the second sleeve member 108. At this time, the locking portion 178 of the locking member 110 is positioned outside the receiving channel 162, thereby allowing the male connector 200 to be freely inserted into and removed from the receiving channel 162.

[0059] Reference Fig. 9A and Fig. 9B When the locking member 110 moves from the unlocking position to the locking position in a direction perpendicular to the axial direction A, the retaining arm 180 of the locking member 110 moves downward along the guide groove 174 until it abuts against the second sleeve member body 154. At the same time, the locking portion 178 of the locking member 110 passes through the window 168 on the second sleeve member body 154 and enters the receiving channel 162. When the male connector 200 is inserted into the receiving channel 162 and the locking member 110 is in the locking position, the locking portion 178 is positioned in the circumferential groove 204 on the outer side of the male connector 200 (see FIG. Fig.10 ) to lock the male connector 200.

[0060] Reference Figure 3B as well as Fig. 12A and Fig. 12B A Y-shaped sealing ring 182 is provided between the second sleeve member 108 and the inner sleeve 106 to seal the annular gap between the inner sleeve 106 and the male connector 200. In this way, when the fluid flows from the male connector 200 to the inner sleeve 106 or from the inner sleeve 106 to the male connector 200 in the quick connector 100, no fluid leakage occurs. In the illustrated embodiment, the second sleeve member 108 includes an annular flange 184 ( Figure 7B). In the radial direction of the second sleeve member 108, the annular flange 184 is located on the inner side of the claw 156. The Y-shaped sealing ring 182 is arranged between the annular flange 184 of the second sleeve member 108 and the second step surface 186 of the inner sleeve 106. The Y-shaped sealing ring 182 is arranged so that its opening 187 faces the second step surface 186 of the inner sleeve 106. In this way, the insertion resistance when the male connector 200 is inserted into the receiving channel 162 can be reduced.

[0061] It should be understood that Figures 1 to 12B The illustrated embodiments only show the shapes, sizes and arrangements of the various optional components of the quick connector according to the present invention, but they are only illustrative and not restrictive. Other shapes, sizes and arrangements may also be adopted without departing from the spirit and scope of the present invention.

[0062] The technical content and technical features of the present invention have been disclosed above. However, it is understandable that, under the creative ideas of the present invention, those skilled in the art can make various changes and improvements to the above disclosed concepts, but they all belong to the protection scope of the present invention. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present invention is determined by the claims.

Claims

1. A quick connector for connecting a male connector and a flexible pipe, characterized in that: The quick connector comprises: a first sleeve member, the first sleeve member comprising an outer sleeve and an inner sleeve coaxially arranged in an axial direction, the outer sleeve and the inner sleeve being separately formed parts and coupled to each other, the flexible tube being adapted to be inserted in the axial direction and clamped between the outer sleeve and the inner sleeve; a second sleeve member, the second sleeve member and the first sleeve member are arranged along the axial direction and coupled to each other, the second sleeve member being configured to receive the male connector; and a locking member configured to cooperate with the second sleeve member to lock the male connector in the second sleeve member; Wherein, the outer sleeve and the inner sleeve are connected to each other through a connecting structure, and the connecting structure comprises: a tongue that projects from the outer sleeve; and a through hole provided in the circumferential wall of the inner sleeve and arranged to allow the tongue to be inserted into the inner sleeve through the through hole, The coupling structure is configured such that when the tongue portion is inserted into the inner sleeve, the outer surface of the tongue portion abuts against the inner surface of the circumferential wall of the inner sleeve. Wherein, the first sleeve component further includes an abutment structure, and the abutment structure is configured to make the inner surface of the outer sleeve abut against the outer surface of the inner sleeve.

2. The quick connector for connecting a male connector and a flexible pipe according to claim 1, characterized in that: The coupling structure is configured to prevent relative rotation between the outer sleeve and the inner sleeve.

3. The quick connector for connecting a male connector and a flexible pipe according to claim 1, characterized in that: The tongue-shaped portion protrudes from the circumferential edge of the outer sleeve; the through hole is configured to allow the tongue-shaped portion to be inserted into the inner sleeve through the through hole along the axial direction.

4. The quick connector for connecting a male connector and a flexible pipe according to claim 1, characterized in that: The abutment structure comprises: a first abutment portion defined by a first annular portion of a circumferential wall of the outer sleeve; a second abutment defined by a second annular portion of the circumferential wall of the inner sleeve; Wherein, the inner surface of the first abutting portion is suitable for abutting against the outer surface of the second abutting portion.

5. The quick connector for connecting a male connector and a flexible pipe according to claim 1, characterized in that: The outer sleeve and the inner sleeve are also coupled to each other by welding.

6. The quick connector for connecting a male connector and a flexible pipe according to any one of claims 1 to 5, characterized in that: The first sleeve member includes a limiting portion for limiting the position of the flexible tube.

7. The quick connector for connecting a male connector and a flexible pipe according to claim 6, characterized in that: The limiting portion is in the form of a convex piece, and the convex piece protrudes inwardly from the circumferential wall of the outer sleeve along the radial direction; and / or The limiting portion is in the form of a step surface, and the step surface is arranged on the circumferential wall of the inner sleeve.

8. The quick connector for connecting a male connector and a flexible pipe according to any one of claims 1 to 5, characterized in that: The first sleeve member and the second sleeve member are coupled to each other by snap-fitting.

9. The quick connector for connecting a male connector and a flexible pipe according to claim 8, characterized in that: The outer sleeve of the first sleeve member includes an annular raised section that is raised outward in the radial direction and extends in the circumferential direction; The second sleeve member includes a second sleeve member body and a plurality of claws extending from the second sleeve member body in the axial direction and arranged at intervals in the circumferential direction. Wherein, the plurality of claws are suitable for engaging with the annular raised section.

10. The quick connector for connecting a male connector and a flexible pipe according to any one of claims 1 to 5, characterized in that: The second sleeve member and the inner sleeve jointly define a receiving passage along the axial direction for receiving the male connector.

11. The quick connector for connecting a male connector and a flexible pipe according to claim 10, characterized in that: The locking member is suitable for moving between an unlocked position and a locked position in a direction perpendicular to the axial direction, wherein the locking member has at least one locking portion, and when the locking member is in the unlocked position, the at least one locking portion is positioned outside the receiving channel, and when the male connector is inserted into place in the receiving channel and the locking member is in the locked position, the at least one locking portion is positioned in a circumferential groove outside the male connector to lock the male connector.

12. The quick connector for connecting a male connector and a flexible pipe according to claim 10, characterized in that: A Y-shaped sealing ring is arranged between the second sleeve component and the inner sleeve to seal the annular gap between the inner sleeve and the male connector.

13. The quick connector for connecting a male connector and a flexible pipe according to any one of claims 1 to 5, characterized in that: The outer sleeve and the inner sleeve are respectively formed by stamping a metal piece, and / or the second sleeve member is formed by plastic injection molding.

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