A quick-connect fitting for automotive nylon tubing that is easy to insert

Abstract

This utility model discloses a quick-connect fitting for automotive nylon tubing that is easy to insert, including a base and a housing disposed on the base, and further including a dustproof ring, a first sealing ring, and a retaining ring; the housing includes a cylindrical body, and the lower end of the inner side wall of the cylindrical body is provided with an internal thread; the base includes a tubular body and a central tube, the middle part of the outer side wall of the tubular body is provided with a nut boss, the outer side wall of the tubular body above the nut boss is provided with a first external thread adapted to the internal thread, and the outer side wall of the tubular body below the nut boss is provided with a second external thread; the lower end of the central tube extends into the tubular body and connects to it, and a limiting groove adapted to the nylon tubing is formed between the central tube and the tubular body; the upper end of the central tube extends into the cylindrical body; the dustproof ring and the first sealing ring are disposed sequentially from top to bottom on the upper end of the inner side wall of the cylindrical body; the retaining ring is disposed on the inner side wall of the cylindrical body and abuts against the upper end of the tubular body.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically a quick-connect fitting for automotive nylon tubing that is easy to insert. Background Technology

[0002] Traditional quick-connect couplings for automotive nylon tubing have the following drawbacks:

[0003] 1. In the traditional structure, a sealing ring is placed under the retaining ring. When the tube passes through the retaining ring, the tube will squeeze the sealing ring, and the sealing ring will prevent the retaining ring from opening. The resistance of the retaining ring opening and the resistance of the sealing ring opening form a resultant force, which leads to an increase in insertion resistance.

[0004] 2. In traditional structures, if the pipe body is scratched by the retaining ring or scraped, foreign objects may fall onto the sealing ring, causing air leakage.

[0005] 3. The product is difficult to disassemble. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a quick-connect fitting for automotive nylon tubes that is easy to insert. It has the advantages of simple processing and production, easy insertion of nylon tubes, better quick-connect sealing effect, and repeated disassembly and installation.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a quick-connect fitting for automotive nylon tubing that is easy to insert, comprising a base and a housing disposed on the base, and further comprising a dustproof ring, a first sealing ring, and a retaining ring; the housing comprises a cylindrical body, the lower end of the inner sidewall of the cylindrical body being provided with an internal thread; the base comprises a tubular body and a central tube, the middle of the outer sidewall of the tubular body being provided with a nut boss, a first external thread adapted to the internal thread being provided on the outer sidewall of the tubular body above the nut boss, and a second external thread being provided on the outer sidewall of the tubular body below the nut boss; the lower end of the central tube extends into and connects to the tubular body, and a limiting groove adapted to the nylon tubing is formed between the central tube and the tubular body; the upper end of the central tube extends into the cylindrical body; the dustproof ring and the first sealing ring are disposed sequentially from top to bottom on the upper end of the inner sidewall of the cylindrical body; the retaining ring is disposed on the inner sidewall of the cylindrical body and abuts against the upper end of the tubular body.

[0008] A further improvement is that the upper end of the cylindrical body tapers inward to form a conical part, and the inner sidewall of the conical part is provided with a first mounting groove for installing a dustproof ring and a second mounting groove for installing a first sealing ring.

[0009] A further improvement is that the central tube and the tubular body are an integral structure.

[0010] A further improvement is that a first flared opening is provided on the inner wall of the cylindrical body at the position of the internal thread, and the larger end of the first flared opening faces downward.

[0011] A further improvement is that a first limiting groove is provided at the junction of the first flared opening and the internal thread.

[0012] A further improvement is that the outer wall of the cylindrical body is provided with at least two opposing limiting planes.

[0013] A further improvement is that a third mounting groove is provided at the junction of the first external thread and the nut boss, and a second sealing ring is provided in the third mounting groove.

[0014] A further improvement is that a fourth mounting groove is provided on the inner side of the bottom of the nut boss, and a third sealing ring is provided in the fourth mounting groove.

[0015] A further improvement is that the retaining ring is conical, and a second limiting groove is provided at the lower end of the inner sidewall of the retaining ring. A second flared opening is provided at the position of the inner sidewall of the retaining ring on the second limiting groove, with the larger end of the second flared opening facing upward.

[0016] A further improvement is that the retaining ring has a notch.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. In this utility model, by optimizing the relative positions of the retaining ring and the sealing ring, the tube body passes through the sealing ring first, thereby avoiding a complex stress environment after the retaining ring and the sealing ring come into contact. Finally, it passes through the retaining ring, which is placed directly on the base, making it easier to insert the tube body.

[0019] 2. In this utility model, the sealing ring is far away from the retaining ring to avoid air leakage.

[0020] 3. In this utility model, the outer shell is machined with a positioning plane. When disassembly is required, a wrench is inserted into the positioning plane and unscrewed. Disassembly is convenient, further improving the reliability and practicality of the product. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the quick-connect fitting for automotive nylon tubing, which is easy to insert, in an embodiment of this utility model.

[0022] Figure 2 This is an exploded view of the quick-connect fitting for automotive nylon tubing, which is easy to insert, according to an embodiment of this utility model.

[0023] Figure 3 This is a schematic diagram of the working state of the quick-connect fitting for automotive nylon tubing, which is easy to insert, in an embodiment of this utility model.

[0024] Figure 4 for Figure 3 A sectional view;

[0025] Figure 5 This is a perspective view of the housing in an embodiment of the present utility model;

[0026] Figure 6 This is a perspective view of the housing from another side in an embodiment of this utility model;

[0027] Figure 7 This is a cross-sectional view of the shell in an embodiment of the present utility model;

[0028] Figure 8 This is a perspective view of the base in an embodiment of the present utility model;

[0029] Figure 9 This is a cross-sectional view of the base in an embodiment of this utility model;

[0030] Figure 10 This is a perspective view of the retaining ring in an embodiment of this utility model;

[0031] Figure 11 This is a cross-sectional view of the retaining ring in an embodiment of this utility model.

[0032] Figure label:

[0033] 1-Shell; 11-Cylindrical body; 12-Conical part; 13-Limiting plane; 14-First mounting groove; 15-Second mounting groove; 16-First flared mouth; 17-First limiting groove; 18-Internal thread;

[0034] 2-Base; 21-Tubular body; 22-Nut boss; 23-Center tube; 24-Limiting slot; 25-First external thread; 26-Second external thread; 27-Third mounting slot; 28-Fourth mounting slot;

[0035] 3-Dustproof ring;

[0036] 4-First sealing ring;

[0037] 5-Snap ring; 51-Notch; 52-Second limiting groove; 53-Second flared opening;

[0038] 6-Second sealing ring;

[0039] 7-Third sealing ring. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0041] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. They should not be construed as limiting the specific protection scope of this utility model.

[0042] Furthermore, 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. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0043] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0044] See Figures 1-4 As shown, this utility model embodiment provides a quick-connect fitting for automotive nylon tubing that is easy to insert, including a base 2 and a housing 1 disposed on the base 2, and also including a dustproof ring 3, a first sealing ring 4 and a retaining ring 5;

[0045] See Figures 5-7 As shown, the housing 1 includes a cylindrical body 11, with an internal thread 18 at the lower end of its inner wall. Specifically, the upper end of the cylindrical body 11 tapers inward to form a conical portion 12, and the inner wall of the conical portion 12 has a first mounting groove 14 for installing a dustproof ring 3 and a second mounting groove 15 for installing a first sealing ring 4. The central tube 23 and the tubular body 21 are integrally formed. A first flared opening 16 is provided on the inner wall of the cylindrical body 11 at the position of the internal thread 18, with the larger end of the first flared opening 16 facing downward. A first limiting groove 17 is provided at the junction of the first flared opening 16 and the internal thread 18. At least two opposing limiting planes 13 are provided on the outer wall of the cylindrical body 11.

[0046] See Figures 8-9As shown, the base 2 includes a tubular body 21 and a central tube 23. A nut boss 22 is provided in the middle of the outer side wall of the tubular body 21. A first external thread 25 that matches the internal thread 18 is provided on the outer side wall of the tubular body 21 above the nut boss 22. A second external thread 26 is provided on the outer side wall of the tubular body 21 below the nut boss 22. Specifically, a fourth mounting groove 28 is provided on the inner side of the bottom of the nut boss 22. A third sealing ring 7 is provided in the fourth mounting groove 28.

[0047] The lower end of the central tube 23 extends into and connects to the tubular body 21, and a limiting groove 24 adapted to the nylon tube is formed between the central tube 23 and the tubular body 21; the upper end of the central tube 23 extends into the cylindrical body 11.

[0048] Dustproof ring 3 and first sealing ring 4 are arranged sequentially from top to bottom on the upper end of the inner side wall of cylindrical body 11; specifically, a third mounting groove 27 is provided at the junction of the first external thread 25 and the nut boss 22, and a second sealing ring 6 is provided in the third mounting groove 27.

[0049] See Figure 10 and Figure 11 As shown, the retaining ring 5 is disposed on the inner side wall of the cylindrical body 11 and abuts against the upper end of the tubular body 21. Specifically, the retaining ring 5 is conical, and a second limiting groove 52 is provided at the lower end of the inner side wall of the retaining ring 5. A second flared opening 53 is provided on the inner side wall of the retaining ring 5 at the position on the second limiting groove 52, with the larger end of the second flared opening 53 facing upward. Specifically, the retaining ring 5 is provided with a notch 51.

[0050] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A quick-connect fitting for automotive nylon tubing that is easy to insert, comprising a base (2) and a housing (1) disposed on the base (2), characterized in that: It also includes a dustproof ring (3), a first sealing ring (4), and a retaining ring (5); The housing (1) includes a cylindrical body (11), and the lower end of the inner sidewall of the cylindrical body (11) is provided with an internal thread (18). The base (2) includes a tubular body (21) and a central tube (23). A nut boss (22) is provided in the middle of the outer side wall of the tubular body (21). A first external thread (25) adapted to the internal thread (18) is provided on the outer side wall of the tubular body (21) above the nut boss (22). A second external thread (26) is provided on the outer side wall of the tubular body (21) below the nut boss (22). The lower end of the central tube (23) extends into the tubular body (21) and is connected thereto, and a limiting groove (24) adapted to the nylon tube is formed between the central tube (23) and the tubular body (21); the upper end of the central tube (23) extends into the cylindrical body (11); The dustproof ring (3) and the first sealing ring (4) are arranged sequentially from top to bottom on the upper end of the inner wall of the cylindrical body (11); The retaining ring (5) is disposed on the inner side wall of the cylindrical body (11) and abuts against the upper end of the tubular body (21).

2. The quick-connect fitting for automotive nylon tubing as described in claim 1, characterized in that: The upper end of the cylindrical body (11) is tapered inward to form a conical part (12), and the inner sidewall of the conical part (12) is provided with a first mounting groove (14) for installing a dustproof ring (3) and a second mounting groove (15) for installing a first sealing ring (4).

3. The quick-connect fitting for automotive nylon tubing as described in claim 1, characterized in that: The central tube (23) and the tubular body (21) are an integral structure.

4. The quick-connect fitting for automotive nylon tubing as described in claim 1, characterized in that: The inner wall of the cylindrical body (11) is provided with a first flared mouth (16) located on the internal thread (18), and the larger end of the first flared mouth (16) faces downward.

5. The quick-connect fitting for automotive nylon tubing as described in claim 4, characterized in that: A first limiting groove (17) is provided at the junction of the first flared mouth (16) and the internal thread (18).

6. The quick-connect fitting for automotive nylon tubing as described in claim 1, characterized in that: The outer wall of the cylindrical body (11) is provided with at least two opposing limiting planes (13).

7. The quick-connect fitting for automotive nylon tubing as described in claim 1, characterized in that: A third mounting groove (27) is provided at the junction of the first external thread (25) and the nut boss (22), and a second sealing ring (6) is provided in the third mounting groove (27).

8. The quick-connect fitting for automotive nylon tubing as described in claim 1, characterized in that: The bottom inner side of the nut boss (22) is provided with a fourth mounting groove (28), and a third sealing ring (7) is provided in the fourth mounting groove (28).

9. The quick-connect fitting for automotive nylon tubing as described in claim 1, characterized in that: The retaining ring (5) is conical. The lower end of the inner sidewall of the retaining ring (5) is provided with a second limiting groove (52), and the inner sidewall of the retaining ring (5) is provided with a second horn mouth (53) at the position on the second limiting groove (52), with the larger end of the second horn mouth (53) facing upward.

10. The quick-connect fitting for automotive nylon tubing as described in claim 1, characterized in that: The retaining ring (5) is provided with a notch (51).

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