Quick plug connector assembly

Abstract

The invention provides a quick-plug connector assembly, the quick-plug connector assembly comprises a quick-plug female head and a quick-plug male head, the quick-plug female head comprises a first connector, a second connector, an elastic piece, a movable sleeve and a locking steel ball, the first connector is provided with an axially-through mounting groove, the second connector is provided with an axially-through plug-in groove, and the elastic piece is arranged in the mounting groove. A mounting hole communicated with the inserting groove is formed in the circumferential direction of the second connector, the locking steel ball is movably arranged in the mounting hole, and the elastic piece is connected between the first connector and the movable sleeve and provides pre-tightening force for enabling the movable sleeve to extrude the locking steel ball; the quick-plug male head is provided with a locking groove, and the quick-plug male head is provided with a locking position which extends into the plug-in groove and is locked with the second connector, and an unlocking position which is separated from the plug-in groove. The technical problem that in the prior art, a pump and an oil pipe are in threaded connection, and consequently the assembling efficiency is low is solved.

Description

Technical Field

[0001] This invention relates to the technical field of quick-connect couplings, and more specifically, to a quick-connect coupling assembly. Background Technology

[0002] Currently, most commercial vehicles in China generally use traditional threaded connections for key hydraulic systems. This involves machining external or internal threads at the outlets of the master cylinder and power booster pump, as well as at the joints of the oil pipes, and connecting them via threaded conical surfaces. This traditional threaded connection method has low assembly efficiency.

[0003] There is currently no effective solution to the technical problem of low assembly efficiency caused by the use of threaded connections between pumps and oil pipes in existing technologies. Summary of the Invention

[0004] The main objective of this invention is to provide a quick-connect fitting assembly to solve the technical problem of low assembly efficiency caused by the use of threaded connections between pumps and oil pipes in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a quick-connect fitting assembly is provided, comprising: a quick-connect female fitting, the quick-connect female fitting including a first connector, a second connector, an elastic element, a movable sleeve, and a locking steel ball, the first connector having an axially penetrating mounting groove, at least a portion of the second connector being disposed within the mounting groove, the second connector having an axially penetrating insertion groove, the second connector having a mounting hole circumferentially provided with the insertion groove communicating with the insertion groove, the locking steel ball being movably disposed within the mounting hole, the movable sleeve being sleeved on the outer wall of the second connector, the elastic element being disposed within the mounting groove, the elastic element being connected between the first connector and the movable sleeve, the elastic element providing a preload force for the movable sleeve to compress the locking steel ball; and a quick-connect male fitting, the quick-connect male fitting having a locking groove, the quick-connect male fitting having a locking position for extending into the insertion groove and locking with the second connector, and an unlocking position for disengaging from the insertion groove, wherein when the quick-connect male fitting is in the locking position, a portion of the locking steel ball is located within the locking groove.

[0006] Furthermore, the second connector is a stepped shaft structure, comprising a first shaft segment and a second shaft segment. The outer diameter of the second shaft segment is larger than that of the first shaft segment. A shoulder is formed at the end of the second shaft segment near the first shaft segment. The first shaft segment extends into the mounting groove and connects with the first connector. A first annular boss is provided on the inner wall of the movable sleeve. The first annular boss is fitted onto the outer wall of the first shaft segment. When the quick-connect male is in the locked position, one end of the first annular boss abuts against the shoulder.

[0007] Furthermore, a limiting structure is provided at the end of the movable sleeve away from the first annular boss. When the quick-connect male is in the unlocked position, the limiting structure abuts against the end face of the first connector.

[0008] Furthermore, at least part of the second shaft section is located outside the mounting groove, and the locking steel ball is located outside the mounting groove; a conical cavity is formed inside the movable sleeve, and a limiting structure is formed on the outer wall of the conical cavity. The inner diameter of the conical cavity is set increasing away from the first annular boss. When the quick-connect male head is in the locking position, the inner conical surface of the conical cavity abuts and engages with the locking steel ball.

[0009] Furthermore, the limiting structure is a protrusion formed on the outer wall of the conical cavity, and the protrusion extends circumferentially along the conical cavity.

[0010] Furthermore, a second annular boss is provided at the end of the conical cavity away from the first annular boss. The second annular boss is sleeved on the outer wall of the second shaft segment, and the second annular boss and the second shaft segment are slidably fitted together.

[0011] Furthermore, when the quick-connect male connector is in the locked position, the quick-connect male connector abuts against the groove wall of the insertion slot through the sealing ring.

[0012] Furthermore, the quick-connect male connector has a stepped shaft structure, comprising a first insertion section and a second insertion section. The outer diameter of the first insertion section is smaller than the outer diameter of the second insertion section, and the outer diameter of the second insertion section is smaller than the diameter of the inlet end of the insertion groove. A locking groove is provided on the outer wall of the second insertion section, and the outer wall of the first insertion section abuts against the groove wall of the insertion groove through a sealing ring. When the quick-connect male connector is in the locked position, the first insertion section is located away from the inlet end of the insertion groove, and the second insertion section is located close to the inlet end of the insertion groove.

[0013] Furthermore, the sealing ring is connected to the insertion groove, and the outer peripheral surface of the end of the first insertion segment away from the second insertion segment is chamfered.

[0014] Furthermore, the insertion groove is a stepped groove, which includes a first groove segment and a second groove segment. The diameter of the first groove segment is smaller than that of the second groove segment. A limiting platform is formed at the end of the first groove segment near the second groove segment. The outer ring of the sealing ring is connected to the groove wall of the second groove segment, and one end face of the sealing ring is connected to the limiting platform.

[0015] Applying the technical solution of this invention, the second connector is connected to the first connector. The second connector has a groove for engaging with the quick-connect male connector. A locking steel ball is provided in the circumferential mounting hole of the second connector. The locking steel ball is movably disposed relative to the second connector. A movable sleeve is sleeved on the second connector. Driving the movable sleeve to move axially along the second connector will squeeze or disengage the locking steel ball. An elastic element provides a preload force to squeeze the locking steel ball, thereby achieving the engagement of the locking steel ball with the locking groove on the quick-connect male connector. The quick-connect female connector is connected to the pump through the first connector, and one end of the quick-connect male connector is connected to the oil pipe. The quick-connect female connector engages with the quick-connect male connector through the second connector. In the above solution, when assembling the quick-connect female connector and the quick-connect male connector, it is only necessary to align the quick-connect male connector with the groove of the quick-connect female connector and push it in straight, without needing to align the threads and rotate multiple times. This simplifies the operation, shortens the assembly time, and improves assembly efficiency. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of the quick-connect connector assembly in this invention is shown;

[0018] Figure 2 A schematic diagram of the quick-connect female connector in this invention is shown;

[0019] Figure 3 A schematic diagram of the quick-connect male connector of the present invention is shown.

[0020] The above figures include the following reference numerals:

[0021] 1. Quick-connect female connector;

[0022] 11. First connector; 111. Mounting groove; 112. First flow channel; 113. Third shaft section; 114. Fourth shaft section;

[0023] 12. Second connector; 121. Insertion groove; 1211. First groove section; 1212. Second groove section; 1213. Limiting platform; 122. Second flow channel; 123. First shaft section; 124. Second shaft section; 125. Shaft shoulder;

[0024] 13. Elastic components;

[0025] 14. Movable sleeve; 141. First annular boss; 142. Limiting structure; 143. Conical cavity; 144. Second annular boss;

[0026] 15. Locking steel ball;

[0027] 2. Quick-connect male connector;

[0028] 21. Locking groove; 22. Third flow channel; 23. First insertion section; 231. Chamfer; 24. Second insertion section;

[0029] 3. Sealing ring. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0034] Combination Figures 1 to 3 As shown, according to a specific embodiment of this application, a quick-connect connector assembly is provided.

[0035] Specifically, the quick-connect coupling assembly includes a quick-connect female connector 1 and a quick-connect male connector 2. The quick-connect female connector 1 includes a first connector 11, a second connector 12, an elastic element 13, a movable sleeve 14, and a locking ball 15. The first connector 11 has an axially penetrating mounting groove 111, at least a portion of the second connector 12 is disposed within the mounting groove 111, the second connector 12 has an axially penetrating insertion groove 121, and the second connector 12 has a mounting hole circumferentially connected to the insertion groove 121. The locking ball 15 is movably disposed within the mounting hole. The movable sleeve 1... 4 are sleeved on the outer wall of the second connector 12. The elastic element 13 is disposed in the mounting groove 111. The elastic element 13 is connected between the first connector 11 and the movable sleeve 14. The elastic element 13 provides a pre-tightening force to compress the locking steel ball 15 by the movable sleeve 14. The quick-connect male connector 2 is provided with a locking groove 21. The quick-connect male connector 2 has a locking position that extends into the insertion groove 121 and locks with the second connector 12, and an unlocking position that disengages from the insertion groove 121. When the quick-connect male connector 2 is in the locking position, part of the locking steel ball 15 is located in the locking groove 21.

[0036] In the embodiments of this application, the second connector 12 is connected to the first connector 11. The second connector 12 is provided with a insertion groove 121 for engaging with the quick-connect male connector. A locking steel ball 15 is provided in the circumferential mounting hole of the second connector 12. The locking steel ball 15 is movably disposed relative to the second connector 12. A movable sleeve 14 is sleeved on the second connector 12. The movable sleeve 14 is driven to move axially along the second connector 12 to squeeze or disengage the locking steel ball 15. The elastic element 13 provides a pre-tightening force to squeeze the locking steel ball 15 by the movable sleeve 14, thereby realizing the insertion and engagement of the locking steel ball with the locking groove on the quick-connect male connector. The quick-connect female connector is connected to the pump through the first connector 11. One end of the quick-connect male connector 2 is connected to the oil pipe. The quick-connect female connector 1 is inserted and engaged with the quick-connect male connector 2 through the second connector 12. In the above scheme, when assembling the quick-connect female connector 1 and the quick-connect male connector 2, you only need to align the quick-connect male connector 2 with the insertion slot 121 of the quick-connect female connector 1 and push it in straight. There is no need to align the threads and rotate multiple times. The operation is simple, the assembly time is shortened, and the assembly efficiency is improved.

[0037] In the embodiments of this application, the quick-connect female connector 1 achieves its locking function through the insertion and engagement of the locking ball 15 with the locking groove 21 on the quick-connect male connector 2. The sealing reliability is unaffected by the tightening torque, thus avoiding leakage problems that may occur due to insufficient torque and reducing the skill and experience requirements for operators. The quick-connect female connector 1 connects to the quick-connect male connector 2 via an insertion method, eliminating the risk of crossed threads and preventing damage to parts caused by crossed threads.

[0038] Specifically, the second connector 12 is a stepped shaft structure, which includes a first shaft section 123 and a second shaft section 124. The outer diameter of the second shaft section 124 is larger than the outer diameter of the first shaft section 123. The end of the second shaft section 124 near the first shaft section 123 forms a shoulder 125. The first shaft section 123 extends into the mounting groove 111 and connects to the first connector 11. The inner wall of the movable sleeve 14 is provided with a first annular boss 141. The first annular boss 141 is sleeved on the outer wall of the first shaft section 123. When the quick-connect male head 2 is in the locked position, one end of the first annular boss 141 abuts against the shoulder 125.

[0039] In the embodiments of this application, the movable sleeve 14 is sleeved on the second connector 12. When the quick-connect male connector 2 is in the locked position, the movable sleeve 14 abuts against the shoulder 125 through the first annular boss 141, thereby limiting the movable sleeve 14. At this time, the elastic element is in a compressed state, providing a pre-tightening force to squeeze the locking steel ball 15 by the movable sleeve 14, thereby locking the insertion of the locking steel ball 15 and the quick-connect male connector 2. The above-mentioned structural cooperation realizes precise control of the relative position of the quick-connect female connector and the quick-connect male connector, avoids connection failure caused by improper insertion, and enhances the stability and reliability of the insertion fit.

[0040] like Figure 1 , Figure 2 As shown, the first connector 11 has a first flow channel 112, which is arranged through the axis of the first connector 11. The first end of the first connector 11 is used to connect to the input end of the pump, and the second end of the first connector 11 is provided with a mounting groove 111, which is coaxially arranged with the first flow channel 112. The second connector 12 has a stepped shaft structure and a second flow channel 122, which is arranged through the axis of the second connector 12. The second connector 12 includes a first shaft section 123 and a second shaft section 124. The outer diameter of the second shaft section 124 is larger than the outer diameter of the first shaft section 123. The first shaft section 123 extends into the mounting groove 111 and connects to the first connector 11, so that the second flow channel 122 is connected to the first flow channel 112. A insertion groove 121 is provided on the second shaft section 124, and the insertion groove 121 is coaxially arranged with the second flow channel 122. The end of the second shaft segment 124 near the first shaft segment 123 forms a shoulder 125. The inner wall of the movable sleeve 14 is provided with a first annular boss 141. The first annular boss 141 is sleeved on the outer wall of the first shaft segment 123. When the quick-connect male head 2 is in the locked position, one end of the first annular boss 141 abuts against the shoulder 125 to restrict the movable sleeve 14 from moving away from the first connector.

[0041] like Figure 2As shown, the first connector 11 has a stepped shaft structure, including a third shaft section 113 and a fourth shaft section 114. The outer diameter of the third shaft section 113 is smaller than the outer diameter of the fourth shaft section 114. The mounting groove 111 is formed on the fourth shaft section. The third shaft section 113 is used for connection to the pump's input end. The third shaft section 113 and the pump's input end can be connected by a thread, or the third shaft section 113 and the pump's input end can be integrally formed.

[0042] like Figure 2 The elastic element 13 is a spring, which is sleeved on the outside of the first shaft section 123. One end of the elastic element 13 is connected to the first connector 11, and the other end of the elastic element 13 is connected to the movable sleeve 14.

[0043] Furthermore, a limiting structure 142 is provided at the end of the movable sleeve 14 away from the first annular boss 141. When the quick-connect male head 2 is in the unlocked position, the limiting structure 142 abuts against the end face of the first connector 11.

[0044] In the embodiments of this application, when the quick-connect male connector is in the unlocked position, the limiting structure 142 abuts against the end face of the first connector 11 to restrict the movable sleeve 14 from moving away from the second connector, so as to prevent the movable sleeve 14 from disengaging from the locking ball 15, thereby restricting the locking ball 15 within the mounting hole of the second connector 12.

[0045] Furthermore, at least a portion of the second shaft segment 124 is located outside the mounting groove 111, and the locking steel ball 15 is located outside the mounting groove 111; a conical cavity 143 is formed inside the movable sleeve 14, and a limiting structure 142 is formed on the outer wall of the conical cavity 143. The inner diameter of the conical cavity 143 is arranged in an increasing manner away from the first annular boss 141. When the quick-connect male head 2 is in the locked position, the inner conical surface of the conical cavity 143 abuts against the locking steel ball 15.

[0046] In the embodiments of this application, the inner diameter of the conical cavity 143 is arranged in an increasing manner away from the first annular boss 141, and the movable sleeve 14 moves axially along the second connector 12 to adjust the squeezing force of the movable sleeve 14 on the locking steel ball 15, thereby realizing the locking and unlocking of the locking steel ball 15 and the quick-connect male head 2.

[0047] like Figure 2As shown, a portion of the second shaft segment 124 is located outside the mounting groove 111. The second shaft segment 124 outside the mounting groove 111 has a mounting hole, and the locking steel ball 15 is located inside the mounting hole, i.e., the locking steel ball 15 is located outside the mounting groove 111. A tapered cavity 143 is formed at the end of the movable sleeve 14 away from the first annular boss. A limiting structure 142 is formed on the outer wall of the tapered cavity 143. The inner diameter of the tapered cavity 143 is progressively larger away from the first annular boss 141. The movable sleeve 14 abuts against the locking steel ball 15 through the inner wall of the tapered cavity 143. By adjusting the axial position of the movable sleeve 14, the compressive force of the movable sleeve 14 on the locking steel ball 15 can be changed. When the quick-connect male connector 2 is in the locked position, the inner conical surface of the conical cavity 143 abuts against the locking steel ball 15, and part of the locking steel ball 15 is located in the insertion groove; the movable sleeve 14 moves to the limiting structure 142 and abuts against the first connector 11, and the locking steel ball 15 can move radially to avoid the insertion groove, thereby allowing the quick-connect male connector 2 to be inserted into the insertion groove.

[0048] Furthermore, the limiting structure 142 is a protrusion formed on the outer wall of the conical cavity 143, and the protrusion extends along the circumference of the conical cavity 143.

[0049] In the embodiments of this application, the protruding structure extends circumferentially along the conical cavity 143 to increase the contact area between the limiting structure 142 and the first connector 11, thereby achieving reliable limiting.

[0050] like Figure 2 As shown, the limiting structure 142 is a conical protrusion formed on the outer wall of the conical cavity 143. The protrusion extends circumferentially along the conical cavity 143, and the outer diameter of the protrusion increases progressively away from the first annular protrusion 141.

[0051] Furthermore, a second annular boss 144 is provided at the end of the conical cavity 143 away from the first annular boss 141. The second annular boss 144 is sleeved on the outer wall of the second shaft segment 124, and the second annular boss 144 and the second shaft segment 124 are slidably fitted together.

[0052] In this embodiment of the application, the second annular boss 144 is slidably fitted to the second shaft segment 124, providing guidance for the movement of the movable sleeve 14 and preventing the movable sleeve 14 from moving radially relative to the second shaft segment 124.

[0053] Furthermore, when the quick-connect male connector 2 is in the locked position, the quick-connect male connector 2 abuts against the groove wall of the insertion groove 121 through the sealing ring 3.

[0054] In the embodiments of this application, the quick-connect male connector 2 abuts against the groove wall of the insertion groove 121 through the sealing ring 3 to prevent oil leakage from the connection between the quick-connect male connector 2 and the second connector 12, thereby improving the sealing performance of the quick-connect connector assembly.

[0055] Specifically, the quick-connect male connector 2 has a stepped shaft structure. The quick-connect male connector 2 includes a first insertion section 23 and a second insertion section 24. The outer diameter of the first insertion section 23 is smaller than the outer diameter of the second insertion section 24. The outer diameter of the second insertion section 24 is smaller than the diameter of the inlet end of the insertion groove 121. The locking groove 21 is provided on the outer wall of the second insertion section 24. The outer wall of the first insertion section 23 abuts against the groove wall of the insertion groove 121 through the sealing ring 3. When the quick-connect male connector 2 is in the locked position, the first insertion section 23 is located away from the inlet end of the insertion groove 121, and the second insertion section 24 is located close to the inlet end of the insertion groove 121.

[0056] In the embodiments of this application, the outer diameter of the first insertion segment 23 is smaller than the outer diameter of the second insertion segment 24. The first insertion segment 23 serves as the insertion end of the quick-connect male connector 2, that is, the first insertion segment 23 serves as the guide segment of the quick-connect male connector 2 to guide the quick-connect male connector 2 into the insertion slot. Figure 1 , Figure 3 As shown, the quick-connect male connector 2 has a third flow channel 22, which extends along the axial direction of the quick-connect male connector 2. The quick-connect male connector 2 has a stepped shaft structure and includes a first insertion section 23 and a second insertion section 24. The outer diameter of the first insertion section 23 is smaller than the outer diameter of the second insertion section 24, and the outer diameter of the second insertion section 24 is smaller than the diameter of the inlet end of the insertion groove 121. A locking groove 21 is provided on the outer wall of the second insertion section 24. When the quick-connect male connector 2 is in the locked position, the outer wall of the first insertion section 23 abuts against the groove wall of the insertion groove 121 through the sealing ring 3. The first insertion section 23 is located away from the inlet end of the insertion groove 121, and the second insertion section 24 is located close to the inlet end of the insertion groove 121. The third flow channel 22 is connected to the first flow channel 112 through the second flow channel 122.

[0057] Specifically, such as Figure 3 As shown, the sealing ring 3 is connected to the insertion groove 121, and the outer peripheral surface of the end of the first insertion segment 23 away from the second insertion segment 24 is provided with a chamfer 231.

[0058] In the embodiments of this application, the chamfer 231 serves as a guide structure for the first insertion segment 23 to guide the first insertion segment 23 into the inner ring of the sealing ring 3.

[0059] Furthermore, such as Figure 2 , Figure 3 As shown, the insertion groove 121 is a stepped groove, which includes a first groove segment 1211 and a second groove segment 1212. The diameter of the first groove segment 1211 is smaller than the diameter of the second groove segment 1212. The end of the first groove segment 1211 near the second groove segment 1212 forms a limiting platform 1213. The outer ring of the sealing ring 3 is connected to the groove wall of the second groove segment 1212, and one end face of the sealing ring 3 is connected to the limiting platform 1213.

[0060] In the embodiments of this application, a limiting platform 1213 is formed at one end of the first groove segment 1211 near the second groove segment 1212. One end face of the sealing ring 3 is connected to the limiting platform 1213, which increases the connection area between the sealing ring 3 and the insertion groove 121, and also restricts the axial movement of the sealing ring 3, thereby improving the sealing performance.

[0061] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0062] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0063] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A quick connect fitting assembly, characterized by, The utility model relates to a quick plug female head (1) and a quick plug male head (2), and the quick plug female head (1) comprises a first joint (11), a second joint (12), an elastic piece (13), a movable sleeve (14) and a locking steel ball (15), the first joint (11) is equipped with the installation groove (111) that penetrates axially, at least partial second joint (12) is equipped in installation groove (111), second joint (12) is equipped with the insertion slot (121) that penetrates axially, the circumference of second joint (12) is equipped with the installation hole that communicates with insertion slot (121), locking steel ball (15) is movably equipped in installation hole, movable sleeve (14) is sleeved on the outer wall of second joint (12), elastic piece (13) is equipped in installation groove (111), elastic piece (13) is connected between first joint (11) and movable sleeve (14), elastic piece (13) provides the pre-tightening force of the movable sleeve (14) extrusion locking steel ball (15), the quick plug male head (2) is equipped with locking groove (21), the quick plug male head (2) has the locking position of the insertion slot (121) with second joint (12) locking and has the unlocking position of the insertion slot (121) of separation, when the quick plug male head (2) is located in locking position, partial locking steel ball (15) is located in locking groove (21). Second joint (12) is the stepped shaft structure, and second joint (12) includes first shaft section (123) and second shaft section (124), the outer diameter of second shaft section (124) is greater than the outer diameter of first shaft section (123), and the end of second shaft section (124) close to first shaft section (123) forms shaft shoulder (125), and first shaft section (123) is connected with first joint (11) and is inserted into installation groove (111). The inner wall of movable sleeve (14) is equipped with first annular boss (141), first annular boss (141) is sleeved on the outer wall of first shaft section (123), when the quick plug male head (2) is located in locking position, one end of first annular boss (141) is in abutment with shaft shoulder (125).

2. The quick connector assembly of claim 1, wherein, The end of movable sleeve (14) away from first annular boss (141) is equipped with limiting structure (142), when the quick plug male head (2) is located in unlocking position, limiting structure (142) is in abutment with the end surface of first joint (11). At least partial second shaft section (124) is located outside installation groove (111), and locking steel ball (15) is located outside installation groove (111).

3. The quick connector assembly of claim 2, wherein, ​ 4. The quick connector assembly of claim 3, wherein, ​ A tapered cavity (143) is formed in the movable sleeve (14), the limiting structure (142) is formed on the outer wall of the tapered cavity (143), and the inner diameter of the tapered cavity (143) is arranged to increase away from the first annular boss (141); when the quick plug male head (2) is in the locking position, the inner tapered surface of the tapered cavity (143) is in abutting connection with the locking steel ball (15).

5. The quick connector assembly of claim 4, wherein, The limiting structure (142) is a protruding structure formed on the outer wall of the tapered cavity (143), and the protruding structure is arranged to extend along the circumference of the tapered cavity (143).

6. The quick connector assembly of claim 4, wherein, The end of the tapered cavity (143) away from the first annular boss (141) is provided with a second annular boss (144), the second annular boss (144) is sleeved on the outer wall of the second shaft segment (124), and the second annular boss (144) is arranged in slidable connection with the second shaft segment (124).

7. The quick connector assembly of any one of claims 1-6, wherein, When the quick plug male head (2) is in the locking position, the quick plug male head (2) is in abutting connection with the groove wall of the plug-in groove (121) through the sealing ring (3).

8. The quick connector assembly of claim 7, wherein, The quick plug male head (2) is a stepped shaft structure, the quick plug male head (2) comprises a first plug-in segment (23) and a second plug-in segment (24), the outer diameter of the first plug-in segment (23) is smaller than the outer diameter of the second plug-in segment (24), the outer diameter of the second plug-in segment (24) is smaller than the caliber of the inlet end of the plug-in groove (121), the locking groove (21) is arranged on the outer wall of the second plug-in segment (24), and the outer wall of the first plug-in segment (23) is in abutting connection with the groove wall of the plug-in groove (121) through the sealing ring (3). When the quick plug male head (2) is in the locking position, the first plug-in segment (23) is arranged away from the inlet end of the plug-in groove (121), and the second plug-in segment (24) is arranged close to the inlet end of the plug-in groove (121).

9. The quick connector assembly of claim 8, wherein, The sealing ring (3) is connected with the plug-in groove (121), and the outer circumferential surface of the end of the first plug-in segment (23) away from the second plug-in segment (24) is provided with a chamfer (231).

10. The quick connector assembly of claim 8, wherein, The plug-in groove (121) is a stepped groove, the plug-in groove (121) comprises a first groove segment (1211) and a second groove segment (1212), the caliber of the first groove segment (1211) is smaller than the caliber of the second groove segment (1212), one end of the first groove segment (1211) close to the second groove segment (1212) forms a limiting table (1213), the outer ring of the sealing ring (3) is connected with the groove wall of the second groove segment (1212), and one end surface of the sealing ring (3) is connected with the limiting table (1213).

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