A SAE joint

Abstract

The utility model relates to the technical field of connecting joint, specifically relates to a SAE joint, include: the male joint and the female joint that carry out axial locking and unlocking through the circumferential rotation locking structure, the female joint includes the outer casing and the inner casing, the circumferential rotation locking structure includes cantilever buckle and the card slot, the card slot is located on the male joint, the fixed end of cantilever buckle is arranged on the outer casing, and the cantilever end of cantilever buckle extends along the circumferential direction of the outer casing and is bent inward and is clamped into the card slot, and the side opposite with the male joint installation direction on the cantilever end has assembly guide structure. In the utility model, the male joint and the female joint are locked and unlocked axially through the circumferential rotation locking structure, realize the function of repeatable assembly, reduce assembly insertion force through the guide inclined plane, improve assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and more specifically, to an SAE connector. Background Technology

[0002] SAE connectors are connectors manufactured according to standards set by the Society of Automotive Engineers (SAE) and are primarily used for hydraulic systems and pipeline connections.

[0003] Patent publication number CN112413262A discloses a rotary unlocking detachable quick connector, including: a male connector, a female connector, and a detachable connection between the male and female connectors that are sealed; the female connector has a housing and a self-locking device for engaging with an annular flange to limit the range of movement of the male connector; the self-locking device includes: an annular, expandable elastic body with a notch, the inner side of which has a pair of limiting protrusions, the limiting protrusions having a sliding surface; the outer surface of the housing has an annular groove for receiving the elastic body, and a socket corresponding to the limiting protrusions, the socket having a guide surface corresponding to the sliding surface, the guide surface being used to block the sliding surface and engage with the sliding surface when the elastic body rotates, causing the limiting protrusions to move away from the center of the female connector, and the elastic body being used to hold the limiting protrusions and block the limiting protrusions.

[0004] In the aforementioned patent documents, to achieve detachability, a limiting protrusion is provided inside the self-locking device. This limiting protrusion engages with an annular flange to achieve self-locking. Because the limiting protrusion is located inside the self-locking device, the male connector needs to expand the limiting protrusion when inserted into the female connector, allowing the annular flange of the male connector to pass through and limit the limiting protrusion. Due to the limited internal space of the connector, the limiting protrusion's location inside the self-locking device increases the assembly resistance between the male and female connectors, thus increasing assembly difficulty. Utility Model Content

[0005] In view of this, the present invention provides an SAE connector, which aims to solve the problem of increased assembly resistance caused by the self-locking structure in the prior art.

[0006] This utility model discloses an SAE connector, comprising a male connector and a female connector for axial locking and unlocking via a circumferential rotation locking structure. The female connector includes an outer shell and an inner shell. The circumferential rotation locking structure includes a cantilevered buckle and a slot. The slot is disposed on the male connector. The fixed end of the cantilevered buckle is disposed on the outer shell. The cantilevered end of the cantilevered buckle extends circumferentially along the outer shell and bends inward to engage with the slot. An assembly guide structure is provided on the side of the cantilevered end opposite to the installation direction of the male connector.

[0007] Preferably, the assembly guide structure includes an inner guide surface for insertion guidance and an outer guide surface for disengagement guidance, and the area of ​​the inner guide surface is larger than the area of ​​the outer guide surface.

[0008] Preferably, the area of ​​the guide ramp near the male connector on the cantilever end is greater than the area of ​​the guide ramp on the remaining side.

[0009] Preferably, the fixed end of the cantilever buckle has an anti-detachment connecting rib between the cantilever end and the fixed end.

[0010] Preferably, a rotation limiting structure is provided between the outer shell and the inner shell to limit the rotation angle of the circumferential rotation locking structure. At least a portion of the rotation limiting structure is provided on the inner shell, and the remaining portion is provided on the outer shell.

[0011] Preferably, the rotation limiting structure includes a limiting boss and a stop surface, one of which is disposed on the inner housing and the other on the outer housing; the stop surface includes a first stop surface and a second stop surface, and the limiting boss is located between the first stop surface and the second stop surface. When the limiting boss contacts the first stop surface, the circumferential rotation locking structure locks; when the limiting boss contacts the second stop surface, the circumferential rotation locking structure unlocks.

[0012] Preferably, the angle between the first stop surface and the outer wall of the outer shell is greater than 90 degrees and less than 180 degrees, and the angle between the second stop surface and the outer wall of the outer shell is less than or equal to 90 degrees.

[0013] Preferably, the limiting boss has a first contact surface that matches the first stop surface and a second contact surface that matches the second stop surface.

[0014] Preferably, the inner housing has a clearance for the cantilever buckle to pass through, and the clearance has an arc or inclined surface structure on the side where the cantilever buckle rotates and engages.

[0015] Preferably, the outer wall of the end of the male connector that extends into the female connector has an inlet ramp that opens the cantilever buckle.

[0016] Preferably, the inner wall of the inner housing is provided with a sealing limiting step, and an inner sealing ring and a locking ring for fixing the inner sealing ring are provided between the sealing limiting step and the guide inclined surface.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: First, the male and female connectors are axially locked and unlocked via a circumferential rotation locking structure, enabling reconfigurable assembly. Simultaneously, unlocking and assembly can be achieved simply by circumferential rotation, requiring no auxiliary tools and allowing for easy manual operation.

[0018] Secondly, the cantilever buckle of the circumferential rotation locking structure has two intersecting guide bevels on the side opposite to the installation direction of the male connector on the cantilever end. During the assembly of the male and female connectors, the two guide bevels can facilitate assembly and reduce the assembly insertion force. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A three-dimensional structural diagram of an SAE connector provided for an embodiment of this utility model. Figure 1 ; Figure 2 A three-dimensional structural diagram of an SAE connector provided for an embodiment of this utility model. Figure 2 ; Figure 3 A cross-sectional view of an SAE connector provided for an embodiment of this utility model; Figure 4 This is a three-dimensional structural diagram of the outer shell provided in an embodiment of the present utility model; Figure 5 A three-dimensional structural schematic diagram of the inner shell provided for an embodiment of this utility model; Figure 6 A cross-sectional view of the inner shell provided in an embodiment of this utility model; Figure 7 A three-dimensional structural schematic diagram of the male connector provided in an embodiment of this utility model; Figure 8 An exploded view of an SAE connector provided for an embodiment of this utility model.

[0020] In the diagram: 10. Male connector; 101. Slot; 102. Guide bevel; 20. Female connector; 1. Outer shell; 11. Cantilever buckle; 111. Fixed end; 112. Cantilever end; 113. Assembly guide structure; 1131. Inner guide surface; 1132. Outer guide surface; 114. Anti-detachment connecting rib; 12. Limiting boss; 121. Contact surface one; 122. Contact surface two; 2. Inner shell; 21. Stop surface; 211. Stop surface one; 212. Stop surface two; 22. Sealing limiting step; 23. Inner sealing ring; 24. Locking ring; 25. Outer sealing ring; 26. Clearance position. Detailed Implementation

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Combination Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, this embodiment provides an SAE connector, including a male connector 10 and a female connector 20 that are axially locked and unlocked by a circumferential rotation locking structure. At least a portion of the male connector 10 extends into the female connector 20, and the female connector 20 includes an outer shell 1 and an inner shell 2. The circumferential rotation locking structure includes a cantilevered buckle 11 and a slot 101. The slot 101 is provided on the male connector 10, and the fixed end 111 of the cantilevered buckle 11 is provided on the outer shell 1. The cantilevered end 112 of the cantilevered buckle 11 extends circumferentially along the outer shell 1 and bends inward to pass through the inner shell 2 and engage in the slot 101. Preferably, there are three sets of circumferential rotation locking structures arranged in a triangular pattern. The circumferential rotation locking structure of the cantilevered buckle 11 and the slot 101 can simultaneously lock the outer shell 1, the inner shell 2, and the male connector 10 of the female connector 20. The structure is simple, optimizes the number of parts, and reduces the weight of the parts.

[0026] Furthermore, combined Figure 4 As shown, the cantilever end 112 of the cantilever buckle 11 tends to bend inward, so that the cantilever buckle 11 and the male connector 10 form an interference fit structure, that is, the female connector 20 and the male connector 10 form an interference fit structure, which can reduce the risk of interference with other parts and accidental contact leading to disengagement and improve assembly stability.

[0027] Preferably, the cantilever end 112 has an assembly guide structure 113 on the side opposite to the installation direction of the male connector 10. The assembly guide structure 113 includes an inner guide surface 1131 for insertion guidance and an outer guide surface 1132 for disengagement guidance. Since the cantilever end 112 of the cantilever buckle 11 tends to bend inward, the cantilever end 112 of the cantilever buckle 11 needs to be opened first during the assembly process of the male connector 10 and the female connector 20. With the setting of the assembly guide structure 113, the inner guide surface 1131 of the cantilever end 112 of the cantilever buckle 11 can contact the outer wall of the male connector 10 for guidance, and the outer guide surface 1132 can contact the clearance position 26 for guidance. This helps to reduce the assembly insertion force required for the male connector 10 to open the cantilever end 112 of the cantilever buckle 11, thereby reducing the difficulty of the workers' work and improving the assembly efficiency.

[0028] Furthermore, combined Figure 5 As shown, since the cantilever buckle 11 is disposed on the outer shell 1 of the female connector 20, and the inner shell 2 has a clearance 26 for the cantilever buckle 11 to pass through, when the male connector 10 opens the cantilever end 112 of the cantilever buckle 11, the assembly guide structure 113 can guide the cantilever end 112 of the cantilever buckle 11 to a release path, so that the cantilever end 112 can be completely released from the internal space of the female connector 20 through the clearance 26, avoiding the impact of the circumferential rotation locking structure on the internal space of the female connector 20, further reducing the assembly insertion force, and simplifying the complex sealing structure caused by the circumferential rotation locking structure occupying the internal space of the female connector 20.

[0029] Furthermore, the clearance position 26 has an arc or inclined surface structure on the side where the cantilever buckle 11 rotates and engages, which provides guidance and buffer for the rotation and engagement of the cantilever buckle 11, making the rotation process smoother, preventing jamming or damage, and improving assembly efficiency.

[0030] Preferably, the area of ​​the inner guide surface 1131 on the cantilever end 112 is larger than the area of ​​the outer guide surface 1132, which provides better guidance and a larger contact area for the male connector 10 during the connection process, and at the same time facilitates the alignment and insertion of the male connector 10 and the female connector 20.

[0031] Preferably, combined with Figure 4As shown, the fixed end 111 and the cantilever end 112 of the cantilever buckle 11 have an anti-detachment connecting rib 114. Because the cantilever end 112 of the cantilever buckle 11 is bent inward relative to the fixed end 111, the anti-detachment connecting rib 114 also tends to bend inward. The anti-detachment connecting rib 114 can be, for example, an arc surface or a beveled structure. After the cantilever end 112 of the cantilever buckle 11 is engaged in the slot 101, without applying external force, the cantilever end 112 cannot disengage from the slot 101 due to the restriction of the anti-detachment connecting rib 114, ensuring the connection stability of the circumferential rotation locking structure in the locked state.

[0032] Preferably, combined with Figure 2 and Figure 5 As shown, a rotation limiting structure is provided between the outer shell 1 and the inner shell 2 to restrict the rotation angle of the circumferential rotation locking structure. At least a portion of the rotation limiting structure is disposed on the inner shell 2, and the remaining portion is disposed on the outer shell 1. The rotation limiting structure includes a limiting boss 12 and a stop surface 21. One of the limiting boss 12 and the stop surface 21 is disposed on the inner shell 2, and the other is disposed on the outer shell 1. The stop surface 21 includes a first stop surface 211 and a second stop surface 212. The limiting boss 12 has a first contact surface 121 that matches the first stop surface 211 and a second contact surface 122 that matches the second stop surface 212. The rotation limiting structure is used to ensure that the relative rotation of the outer shell 1 and the inner shell 2 is within a specific range, preventing structural damage or functional failure caused by excessive rotation.

[0033] Furthermore, in this embodiment, the locking and unlocking states of the circumferential rotation locking structure are switched by changing the contact state between the limiting boss 12 and the stop surface 21. The limiting boss 12 is located between the first stop surface 211 and the second stop surface 212. When the limiting boss 12 contacts the first stop surface 211, the circumferential rotation locking structure is locked, preventing relative circumferential rotation between the outer shell 1 and the inner shell 2. When the limiting boss 12 contacts the second stop surface 212, the circumferential rotation locking structure is unlocked, allowing relative circumferential rotation between the outer shell 1 and the inner shell 2.

[0034] Preferably, the angle between the first stop surface 211 and the outer wall of the outer shell 1 is greater than 90 degrees and less than 180 degrees, so that the cantilever end 112 of the cantilever buckle 11 can be fully engaged in the slot 101, avoiding incomplete engagement due to the stop structure, which would affect the stability of axial fixation. The angle between the second stop surface 212 and the outer wall of the outer shell 1 is less than or equal to 90 degrees, to prevent excessive rotation of the cantilever end 112 of the cantilever buckle 11 after it comes out of the slot 101, which could lead to structural damage or functional failure.

[0035] Preferably, combined with Figure 3 and Figure 7As shown, the outer wall of the end of the male connector 10 that extends into the female connector 20 has an inlet ramp 102 for opening the cantilevered latch 11. Specifically, along the installation direction of the male connector 10, the guide ramp 113 is provided on the groove wall of the slot 101 on the side that first enters the female connector 20. During the process of the male connector 10 extending into the female connector 20, the cantilever end 112 of the cantilevered latch 11 is first opened and disengaged from the interior of the female connector 20 by the inlet ramp 102. Then, as the male connector 10 continues to extend, the cantilevered latch 11 loses the restriction of the inlet ramp 102 and engages with the slot 101, achieving axial locking. At the same time, after the cantilevered latch 11 engages with the slot 101, the end of the slot wall of the slot 101 is in contact with the inner wall of the female connector 20. In existing technologies, such as the rotary unlocking detachable quick connector disclosed in patent publication number CN112413262A, a locking limiting protrusion is located inside the self-locking device. An annular flange, which cooperates with the limiting protrusion, provides a gap between the annular flange and the inner wall of the self-locking device after insertion. This requires additional structure to achieve an internal seal. In this embodiment, the cantilever buckle 11 can be completely disengaged from the internal space of the female connector 20 during the assembly of the male connector 10 and the female connector 20, reducing unnecessary gap space between the male connector 10 and the female connector 20. This simplifies the internal sealing structure, reduces the number of parts, and lowers production costs.

[0036] Furthermore, combined Figure 3 , Figure 6 and Figure 7 As shown, the inner wall of the inner housing 2 is provided with a sealing and limiting step 22. An inner sealing ring 23 is provided between the sealing and limiting step 22 and the guide inclined surface 102, and a locking ring 24 is provided to fix the inner sealing ring 23. The locking ring 24 can be provided on the inner wall of the inner housing 2 or the outer wall of the male connector 10 through a concave-convex limiting structure. The inner sealing ring 23 is restricted between the locking ring 24 and the sealing and limiting step 22 to achieve internal sealing. In this embodiment, the internal sealing structure of the male connector 10 and the female connector 20 is simple, which reduces assembly difficulty and production costs.

[0037] Furthermore, the outer wall of the inner shell 2 is also fitted with an outer sealing ring 25 to achieve sealing with the connecting pipeline.

[0038] Furthermore, the outer shell 1, made of material such as nylon PA46, can improve the toughness and tensile strength of the parts while maintaining flexibility, reducing insertion force for easier assembly. A color, such as gray, increases visibility, making it easy to identify and determine whether the joint assembly is in place, and facilitating the determination of the assembly position of the manual parts. The inner sealing ring 23, for example, is red, making it easily identifiable and allowing for clear identification of whether it is properly assembled after assembly, as well as preventing incorrect assembly of parts.

[0039] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An SAE connector, comprising a male connector (10) and a female connector (20) for axial locking and unlocking via a circumferential rotation locking structure, the female connector (20) comprising an outer shell (1) and an inner shell (2), characterized in that, The circumferential rotation locking structure includes a cantilever buckle (11) and a slot (101). The slot (101) is provided on the male connector (10). The fixed end (111) of the cantilever buckle (11) is provided on the outer shell (1). The cantilever end (112) of the cantilever buckle (11) extends circumferentially along the outer shell (1) and bends inward to fit into the slot (101). The side of the cantilever end (112) opposite to the installation direction of the male connector (10) has an assembly guide structure (113).

2. The SAE connector according to claim 1, characterized in that, The assembly guide structure (113) includes an inner guide surface (1131) for insertion guidance and an outer guide surface (1132) for disengagement guidance, and the area of ​​the inner guide surface (1131) is greater than the area of ​​the outer guide surface (1132).

3. The SAE connector according to claim 1, characterized in that, The fixed end (111) and the cantilever end (112) of the cantilever buckle (11) have an anti-detachment connecting rib (114).

4. An SAE connector according to claim 1 or 3, characterized in that, A rotation limiting structure is provided between the outer shell (1) and the inner shell (2) to limit the rotation angle of the circumferential rotation locking structure. At least part of the rotation limiting structure is provided on the inner shell (2), and the remaining part is provided on the outer shell (1).

5. An SAE connector according to claim 4, characterized in that, The rotation limiting structure includes a limiting boss (12) and a stop surface (21). One of the limiting boss (12) and the stop surface (21) is disposed on the inner shell (2), and the other is disposed on the outer shell (1). The stop surface (21) includes a stop surface one (211) and a stop surface two (212). The limiting boss (12) is located between the stop surface one (211) and the stop surface two (212). When the limiting boss (12) contacts the stop surface one (211), the circumferential rotation locking structure is locked. When the limiting boss (12) contacts the stop surface two (212), the circumferential rotation locking structure is unlocked.

6. An SAE connector according to claim 5, characterized in that, The angle between the first stop surface (211) and the outer wall of the outer shell (1) is greater than 90 degrees and less than 180 degrees, and the angle between the second stop surface (212) and the outer wall of the outer shell (1) is less than or equal to 90 degrees.

7. An SAE connector according to claim 5, characterized in that, The limiting boss (12) has a contact surface one (121) that matches the stop surface one (211) and a contact surface two (122) that matches the stop surface two (212).

8. An SAE connector according to claim 1, characterized in that, The inner housing (2) has a clearance (26) through which the cantilever buckle (11) passes, and the clearance (26) has an arc or inclined surface structure on the side where the cantilever buckle (11) is rotated and engaged.

9. An SAE connector according to claim 1, characterized in that, The outer side wall of the end of the male connector (10) that extends into the female connector (20) has an inlet ramp (102) that opens the cantilever buckle (11).

10. An SAE connector according to claim 9, characterized in that, The inner wall of the inner shell (2) is provided with a sealing limiting step (22), and an inner sealing ring (23) is provided between the sealing limiting step (22) and the guide inclined surface (102), as well as a locking ring (24) for fixing the inner sealing ring (23).

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