Quick connector

Abstract

The utility model belongs to the technical field of connectors, and particularly relates to a quick connector which comprises a body with a connecting hole, a sealing piece capable of forming sealing with an inserted pipeline is arranged in the connecting hole, one side of the sealing piece abuts against a limiting mechanism arranged on the inner side of the connecting hole for limiting, and the other side of the sealing piece abuts against a pressing ring for limiting. A clamping jaw and a sealing cover are arranged on the side, away from the sealing piece, of the pressing ring, the clamping jaw comprises an annular framework arranged between the pressing ring and the sealing cover and a plurality of clamping teeth arranged on the annular framework, supporting clamping teeth protrude from the end, close to the clamping jaw, of the sealing cover to one side of the clamping jaw, and the peripheral face of an annular boss is a circular truncated cone face. And the diameter of the circular truncated cone surface is gradually increased outwards from one side of the clamping jaw. The clamping teeth can be effectively supported, the clamping teeth are prevented from being turned over towards the side away from the pressing ring, a pipeline is effectively clamped, and the pipeline is prevented from being disengaged.

Description

Technical field:

[0001] The utility model belongs to the technical field of connectors, in particular to a quick connector. Background technology:

[0002] A Chinese utility model patent (publication number CN208886210U, application date October 16, 2018, publication date May 21, 2019) discloses a retractable quick connector comprising a body with a connecting hole, adapted to engage a pipe (pipe) inserted into the connecting hole. A claw ring is provided within the connecting hole, comprising a plurality of latching teeth inclined inwardly toward the connecting hole. An annular socket is disposed on the outer side of the claw ring, which, when pressed inwardly, opens the latching teeth. A cylindrical shell is disposed over the annular socket to restrict its outward movement. The inner end of the cylindrical shell is inserted into and tightly engaged with the connecting hole. An annular pressure member is disposed on the inner side of the cylindrical shell, adapted to be inserted into and tightly engaged with the inner end of the cylindrical shell. The claw ring is sandwiched between the annular pressure member and the cylindrical shell. The claw ring comprises an annular frame and a plurality of latching teeth fixed to the inner diameter of the annular frame. Each latching tooth extends obliquely toward the inside of the connecting hole and is elastically expandable and retractable. A sealing ring fixed in the connecting hole is provided on the inner side of the annular pressing member.

[0003] The disadvantage of the above-mentioned quick connector is that during use, under the action of high pressure in the pipeline, the latching teeth are easily bent to the side away from the pressing member, thereby causing the latching teeth to lose the function of clamping the pipeline, thereby causing the pipeline to fall out. Summary of the invention:

[0004] The utility model aims to provide a quick connector, which effectively supports the clamping teeth to prevent them from folding to a side away from the compression ring, effectively clamps the pipeline and prevents the pipeline from falling out.

[0005] The utility model is achieved in this way:

[0006] A quick connector includes a main body with a connecting hole, wherein a sealing member that can form a seal with an inserted pipe is provided in the connecting hole, one side of the sealing member is in abutment with a limiting mechanism provided on the inner side of the connecting hole for limiting position, and the other side of the sealing member is in abutment with a clamping ring for limiting position, and a clamping claw and a sealing cover are provided on the side of the clamping ring away from the sealing member, the clamping claw includes an annular skeleton provided between the clamping ring and the sealing cover and a plurality of teeth provided on the annular skeleton, and a supporting tooth protrudes toward the side of the clamping claw at one end of the sealing cover close to the clamping claw, and the outer peripheral surface of the annular boss is a frustum, and the diameter of the frustum gradually increases from the side of the clamping claw to the outside.

[0007] In the above-mentioned quick connector, the annular boss and the sealing cover are an integrated structure.

[0008] In the above-mentioned quick connector, the limiting mechanism is an annular step provided in the connecting hole.

[0009] In the above-mentioned quick connector, one end surface of the compression ring away from the sealing member is concave to form a mounting groove, and the annular frame is arranged in the mounting groove.

[0010] In the above-mentioned quick connector, the inner side surface of the annular boss is a cylindrical surface identical to the inner side surface of the cover, and the diameter of the cylindrical surface is smaller than the minimum diameter of the frustum.

[0011] In the above-mentioned quick connector, the sealing member includes a sealing ring and a gasket. There are two or more sealing rings, and the gasket is provided between two adjacent sealing rings.

[0012] In the above-mentioned quick connector, the lengths of the latch teeth are provided in two or more types.

[0013] In the above-mentioned quick connector, the length of the latch teeth can be long or short; the length of the latch teeth can also be long, medium and short.

[0014] In the above-mentioned quick connector, the number of latching teeth of various lengths is the same and they are arranged alternately.

[0015] In the above-mentioned quick connector, an O-ring is provided in the sealing cover to form a seal with the inserted pipe, and a rotating portion is provided at one end of the sealing cover away from the clamping claw, which protrudes from the body and is used for rotation.

[0016] In the above-mentioned quick connector, the rotating part and the sealing cover are an integrated structure.

[0017] In the above-mentioned quick connector, an annular groove for an annular O-ring is provided on the inner side surface of the sealing cover.

[0018] In the above-mentioned quick connector, a socket is provided in the cover, and an annular hook is provided on the outer periphery of the socket. A limiting convex edge is provided on the inner side of the cover for interfering with the annular hook to limit the position. The socket is limited in the cover by the annular hook and the limiting convex edge.

[0019] In the above-mentioned quick connector, the limiting ridge and the sealing cover are an integrated structure.

[0020] The outstanding advantages of the utility model compared with the prior art are:

[0021] 1. The annular boss provided on the cover of the utility model can effectively support the latching teeth and prevent them from folding to the side away from the pressing ring, thereby effectively clamping the pipe and preventing it from falling out;

[0022] 2. The sealing member of the present invention includes a sealing ring and a gasket. Two or more sealing rings are provided, and a gasket is provided between two adjacent sealing rings to effectively prevent the pipe from being difficult to insert or even scratching and damaging the sealing ring located on the inner side. In addition, the gasket can also help suppress the axial deflection of the pipe, thereby strengthening the stability of the connection between the body and the pipe.

[0023] 3. The lengths of the teeth of the present invention are provided in two or more types, and there is some difference in the lengths of the various teeth, which effectively prevents the teeth from jumping and the axial angle of the pipe from excessively bending under high pressure and especially vibration conditions, resulting in failure of some teeth to move evenly and the claw to fail to fully grasp the pipe. Description of the drawings:

[0024] Figure 1 It is a cross-sectional view of the first embodiment of the present utility model;

[0025] Figure 2 It is a top view of the claw of the first embodiment of the present utility model;

[0026] Figure 3 It is an exploded view of the first embodiment of the present utility model;

[0027] Figure 4 It is a cross-sectional view of the second embodiment of the present utility model;

[0028] Figure 5 It is an exploded view of the second embodiment of the present utility model.

[0029] Figure numerals: 1, connecting hole; 2, main body; 3, clamping ring; 4, claw; 41, annular frame; 42, latching teeth; 5, sealing cover; 6, annular boss; 7, round table surface; 8, sealing ring; 9, gasket; 10, O-ring; 11, rotating part; 12, socket; 13, annular hook; 14, limiting ridge; 15, annular step. Specific implementation method:

[0030] The present invention is further described below with reference to specific embodiments. Figure 1 —5:

[0031] Example 1: See Figure 1-3 :

[0032] A quick connector includes a main body 2 with a connecting hole 1, wherein a sealing member that can form a seal with an inserted pipe is provided in the connecting hole 1, one side of the sealing member is in contact with a limiting mechanism provided on the inner side of the connecting hole 1 and the other side is in contact with a clamping ring 3, and a clamping claw 4 and a cover 5 are provided on the side of the clamping ring 3 away from the seal, the clamping claw 4 includes an annular skeleton 41 provided between the clamping ring 3 and the cover 5 and a plurality of teeth 42 provided on the annular skeleton 41, and a supporting tooth 42 protrudes toward the side of the clamping claw 4 at one end of the cover 5 close to the clamping claw 4, and the outer peripheral surface of the annular boss 6 is a frustum 7, and the diameter of the frustum 7 gradually increases from the side of the clamping claw 4 to the outside.

[0033] like Figure 1-3 As shown, the annular boss 6 provided on the sealing cover 5 of the present invention can effectively support the latching teeth 42 to prevent them from folding toward the side away from the clamping ring 3, thereby effectively clamping the pipe and preventing it from falling out.

[0034] The utility model can effectively improve the gripping performance of the clamping claw 4, and tests have shown that the gripping performance can be improved by more than 50%.

[0035] Preferably, the annular boss 6 and the cover 5 are an integrated structure.

[0036] Structure of the limiting mechanism: The limiting mechanism is an annular step 15 arranged in the connecting hole 1.

[0037] Furthermore, one end surface of the clamping ring 3 away from the sealing member is concave to form a mounting groove, and the annular skeleton 41 is arranged in the mounting groove.

[0038] In order to facilitate processing and effectively support the latching tooth 42, the inner side surface of the annular boss 6 is a cylindrical surface that is the same as the inner side surface of the cover 5. The diameter of the cylindrical surface is smaller than the minimum diameter of the frustum surface 7, so that the end surface of the annular boss 6 close to the clamping ring 3 is flat instead of pointed, thereby increasing the contact area and reducing the deformation of the latching tooth 42.

[0039] The structure of the seal: Figure 1 、 3 As shown, the sealing member includes a sealing ring 8 and a gasket 9. There are more than two sealing rings 8, and the gasket 9 is provided between two adjacent sealing rings 8. When the pipeline is inserted into the main body 2 of the present invention, it can prevent the pipeline from passing through and squeezing the sealing ring 8 on the outside, which will cause the sealing ring 8 on the inside to bulge toward the side of the limiting mechanism due to excessive linkage compression. This can avoid the pipeline from being difficult to insert or even scratching and damaging the sealing ring 8 on the inside. In addition, the gasket 9 can also help suppress the axial deflection of the pipeline, and play a role in strengthening the stability of the connection between the main body 2 and the pipeline. In this embodiment, there are two sealing rings 8 and one gasket 9, which is located between the two sealing rings 8.

[0040] Furthermore, the teeth 42 are provided in two or more lengths, with some variation in length between the teeth 42. This effectively prevents the claw 4 from malfunctioning due to excessive axial deflection of the pipe caused by the teeth 42 bouncing under high pressure and, in particular, vibration. This can cause some teeth 42 to not move evenly, resulting in the claw 4 not being able to fully grip the pipe and causing failure. In this embodiment, the teeth 42 are provided in two lengths: long and short.

[0041] In order to better clamp the pipeline with the claw 4, the number of the teeth 42 of various lengths is the same and is alternately arranged. In the present embodiment, the long teeth are provided with nine, and the short teeth are provided with nine, and are alternately arranged.

[0042] In order to limit the shaking of the pipeline during use and to seal the gap between the pipeline and the cover 5, an O-ring 10 is provided in the cover 5 to form a seal with the inserted pipeline. The end of the cover 5 away from the claw 4 is provided with a rotating part 11 protruding from the body 2 and used for rotation.

[0043] Furthermore, the rotating portion 11 and the cover 5 are an integrated structure.

[0044] Installation structure of the O-ring 10 : An annular groove for the annular O-ring 10 is provided on the inner side surface of the cover 5 .

[0045] Example 2: See Figure 4 、 5 :

[0046] This embodiment has substantially the same structure as the first embodiment, with the main difference being that a socket 12 is provided within the cover 5, and an annular hook 13 is provided on the outer periphery of the socket 12. A retaining flange 14 is provided on the inner side of the cover 5 to engage with the annular hook 13 and retain the socket 12 within the cover 5 by means of the annular hook 13 and the retaining flange 14. The socket 12 is provided within the cover 5, and pushing the socket 12 inward opens the latching teeth 42, thereby allowing the pipe to be removed, achieving the purpose of pipe detachment.

[0047] Furthermore, the limiting protrusion 14 and the cover 5 are an integrated structure.

[0048] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A quick connector, comprising a body (2) having a connecting hole (1), wherein a sealing member capable of forming a seal with an inserted pipe is disposed in the connecting hole (1), wherein one side of the sealing member is in contact with a limiting mechanism disposed inside the connecting hole (1) for limiting position, and the other side of the sealing member is in contact with a clamping ring (3) for limiting position, wherein a clamping claw (4) and a sealing cover (5) are disposed on a side of the clamping ring (3) away from the sealing member, wherein the clamping claw (4) comprises an annular frame (41) disposed between the clamping ring (3) and the sealing cover (5) and a plurality of clamping teeth (42) disposed on the annular frame (41), wherein: An annular boss (6) supporting the latch teeth (42) protrudes from one end of the sealing cover (5) close to the latch claw (4) toward one side of the latch claw (4); the outer peripheral surface of the annular boss (6) is a frustum surface (7), and the diameter of the frustum surface (7) gradually increases from one side of the latch claw (4) toward the outside.

2. A quick connector according to claim 1, characterized in that: The inner side surface of the annular boss (6) is a cylindrical surface that is the same as the inner side surface of the cover (5), and the diameter of the cylindrical surface is smaller than the minimum diameter of the frustum surface (7).

3. A quick connector according to claim 1, characterized in that: The sealing member comprises a sealing ring (8) and a gasket (9), wherein more than two sealing rings (8) are provided, and a gasket (9) is provided between two adjacent sealing rings (8).

4. A quick connector according to claim 1, characterized in that: The lengths of the latch teeth (42) are provided in more than two types.

5. A quick connector according to claim 4, characterized in that: The number of latch teeth (42) of various lengths is the same and they are arranged alternately.

6. A quick connector according to claim 1, characterized in that: An O-ring (10) capable of forming a seal with an inserted pipe is arranged inside the sealing cover (5), and a rotating part (11) protruding from the body (2) and used for rotation is arranged at one end of the sealing cover (5) away from the claw (4).

7. A quick connector according to claim 1, characterized in that: The sealing cover (5) is provided with a socket (12) inside, an annular hook portion (13) is provided on the outer periphery of the socket (12), and a limiting convex edge (14) is provided on the inner side of the sealing cover (5) for contacting and limiting the position of the annular hook portion (13).

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