Pipe falling prevention structure of quick connector

Abstract

The utility model relates to an anti-falling pipe structure of a quick connector, which comprises a connector main body with at least two pipe fitting insertion ports, lock caps are arranged at the pipe fitting insertion ports, and pipe fittings are inserted into the connector main body through the lock caps and are locked by the lock caps; the connector further comprises a clamping ring, the first end of the clamping ring abuts against the lock cap, the second end of the clamping ring abuts against the connector body, and the lock cap and the connector body are connected in a locked mode. Compared with the prior art, the pipe fitting connector has the advantages that the clamping ring is arranged to abut against the lock cap, so that the lock cap is locked relative to the connector body in the axial direction, and the situation that locking of a pipe fitting fails due to free movement of the lock cap is avoided; and meanwhile, the clamping ring is obliquely arranged relative to the outer surface of the joint main body, so that the clamping ring is prevented from sliding relative to the joint main body.

Description

Technical Field

[0001] The utility model relates to the field of joints, in particular to an anti-dropping pipe structure of a quick joint. Background Art

[0002] A quick-connect connector is a part used to connect air pipes in a pneumatic system. Existing pneumatic parts generally include a tube body, which is equipped with a button, a top sleeve, a reed, a pressure ring, and a sealing ring. Zinc alloy is used as the material for the top sleeve. Because zinc alloy has relatively low creep strength and poor corrosion resistance, it is prone to rust and deformation during long-term plugging and unplugging, affecting the connection and sealing performance of the quick-connect connector.

[0003] A Chinese utility model patent with authorization announcement number CN202769138U discloses a novel right-angle quick-connect connector, comprising a right-angle connector body. A button, a top sleeve, a spring, a pressure ring, and a sealing ring are coaxially arranged at one end of the right-angle connector body from the outside inward. A threaded connector is connected to the other end of the right-angle connector body. The button is slidably mounted within the top sleeve, with one end resting against the spring. When the button is pushed inward, the spring is compressed and bends inward, enlarging the inner hole of the spring. When the button is released, the spring returns to its original position, pushing the button outward to return to its original position, shrinking the inner hole of the spring. The top sleeve is a copper alloy top sleeve, and the right-angle connector body is also provided with reinforcing ribs. The beneficial effect of this utility model is that the copper alloy top sleeve with high creep strength and good corrosion resistance is used instead of the previous zinc alloy top sleeve, significantly increasing the service life and number of plugging and unplugging times of the right-angle quick-connect connector.

[0004] In this quick-connect connector, a spring is provided inside the connector to lock the button, thereby preventing the button from moving relative to the connector. However, this arrangement requires the spring to be installed inside the connector during assembly, and the position must be accurate, otherwise the spring cannot lock the button, resulting in high assembly requirements and low efficiency. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides an anti-drop pipe structure of a quick connector.

[0006] The above-mentioned problem of the present invention is solved by the following technical solutions:

[0007] A quick connector anti-dropout pipe structure includes a connector body having at least two pipe insertion openings, wherein the pipe insertion openings are provided with locking caps, and the pipes are inserted into the connector body through the locking caps and locked by the locking caps;

[0008] It also includes a clamping ring, the first end of which supports the locking cap, and the second end of which supports the joint body to lock and connect the locking cap and the joint body.

[0009] The above technical solution is further configured as follows: the clamping ring is a ring body with a trapezoidal cross-section, and the inner diameter of the first end is smaller than the inner diameter of the second end.

[0010] The above technical solution is further configured as follows: a plurality of adjustment slots are provided at the second end of the clamping ring.

[0011] The above technical solution is further configured as follows: the locking cap includes an integrally formed outer cap and a hook portion, and a transition groove is provided between the outer cap and the hook portion, and the first end of the clamping ring extends into the transition groove and is supported on the lower end surface of the outer cap.

[0012] The above technical solution is further configured as follows: a limiting edge is provided toward the center of the pipe insertion opening of the joint body, and the limiting edge limits the hook portion in the joint body.

[0013] The above technical solution is further configured as follows: the joint body comprises a joint body and a shrinking sleeve wrapped around the joint body, and the shrinking area of the shrinking sleeve extends to the outside of the pipe insertion port;

[0014] The clamping ring is held on the outer surface of the necking area of the necking sleeve;

[0015] The limiting edge is located at the end of the necking area.

[0016] The above technical solution is further configured as follows: a clamping rib is provided on the inner wall of the hook portion.

[0017] The above technical solution is further configured as follows: the outer end of the clamping rib is bent toward the inside of the joint body.

[0018] The above technical solution is further configured as follows: a locking piece is provided on the inner wall of the necking sleeve, and a locking groove capable of accommodating the locking piece is provided on the joint body.

[0019] Compared with the prior art, the beneficial effects of the present invention are: a clamping ring is provided to hold the locking cap so that the locking cap is locked axially relative to the joint body, thereby preventing the free movement of the locking cap from causing the locking of the pipe fitting to fail; at the same time, the clamping ring is inclined relative to the outer surface of the joint body, thereby preventing the clamping ring from slipping relative to the joint body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 This is a schematic diagram of the exploded structure of the present invention.

[0022] Figure 3 Schematic diagram of the structure of the clamping ring.

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0024] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part A in the middle.

[0025] In the accompanying drawings, 100 is marked, and connector body;

[0026] 200, shrink sleeve; 210, limit edge; 220, locking piece;

[0027] 300, locking cap; 310, outer cap; 320, hook; 321, clamping rib; 301, transition groove;

[0028] 400, clamping ring; 401, first end; 402, second end; 403, adjustment slot;

[0029] a. Pipe fitting insertion port. DETAILED DESCRIPTION

[0030] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0031] like Figure 1-5 As shown, this embodiment discloses an anti-drop tube structure for a quick connector.

[0032] A quick connector anti-dropout pipe structure includes a connector body having at least two pipe insertion openings a, wherein the pipe insertion openings a are provided with locking caps 300, and the pipes are inserted into the connector body through the locking caps 300 and locked by the locking caps 300;

[0033] The connector further comprises a clamping ring 400 , wherein a first end 401 of the clamping ring 400 supports the locking cap 300 , and a second end 402 of the clamping ring 400 supports the connector body, thereby locking and connecting the locking cap 300 and the connector body.

[0034] The above is the basic solution of this embodiment.

[0035] Specific reference Figure 1 and Figure 2 As shown, the locking cap 300 is inserted into the pipe insertion port a of the connector body, and the pipe is inserted into the connector body through the locking cap 300 and has an interference fit with the inner wall of the locking cap 300, thereby completing the locking of the pipe by the locking cap 300;

[0036] Among them, the clamping ring 400 is arranged on the outer periphery of the joint body and is inclined relative to the outer periphery of the joint body; so that the second end 402 is supported on the outer peripheral surface of the joint body; at the same time, the first end 401 of the clamping ring 400 is supported on the locking cap 300, and the locking cap 300 is supported toward the outside away from the pipe insertion port a, so that the locking cap 300 and the joint body are positioned, avoiding axial movement of the locking cap 300 relative to the joint body, and locking the locking cap 300.

[0037] To ensure the inclined position of the clamping ring 400 relative to the connector body, in this embodiment, the clamping ring 400 is a ring body with a trapezoidal cross section, and the inner diameter of the first end 401 is smaller than the inner diameter of the second end 402 .

[0038] Specific reference Figure 3 and Figure 4 As shown, the cross section of the clamping ring 400 is trapezoidal, and the inner diameter of the first end 401 is smaller than the inner diameter of the second end 402, that is, the clamping ring 400 is constricted toward the locking cap 300;

[0039] When the clamping ring 400 is put on the joint body, the first end 401 and the outer surface of the joint body are in point contact, and the supporting force on the surface of the joint body is perpendicular to the surface of the joint body. Among the reaction force of the supporting force, the axial component supports the clamping ring 400 toward the side of the locking cap 300, so that the second end 402 of the clamping ring 400 has a supporting effect on the locking cap 300.

[0040] Preferably, in this embodiment, the angle between the clamping ring 400 and the surface of the connector body is an acute angle.

[0041] Preferably, in this embodiment, in order to adapt to different types of connector bodies, a plurality of adjustment slots 403 are provided at the second end 402 of the clamping ring 400 .

[0042] Specific reference Figure 3 As shown, the setting of the adjustment groove 403 enables the second end 402 of the clamping ring 400 to form a clamping claw structure. When a larger-sized connector body is matched, the clamping claw structure expands and deforms outwards, thereby being able to clamp the connector body.

[0043] In this embodiment, the specific setting of the locking cap 300 is as follows: the locking cap 300 includes an integrally formed outer cap 310 and a hook portion 320, and a transition groove 301 is provided between the outer cap 310 and the hook portion 320, and the first end 401 of the clamping ring 400 extends into the transition groove 301 and is supported on the lower end surface of the outer cap 310.

[0044] In order to make the hook portion 320 adaptable to various types of pipe fittings, a plurality of hook portions 320 are provided and arranged circumferentially, with gaps left between adjacent hook portions 320 .

[0045] Specific reference Figure 4 and Figure 5 As shown, the center of the locking cap 300 is set as a through hole that can accommodate the insertion of the pipe fitting. The outer end of the outer cap 310 is larger than the pipe fitting insertion opening a, so that the outer cap 310 is located outside the pipe fitting insertion opening a; the hook portion 320 can enter the interior of the connector body through the pipe fitting insertion opening a and can be retained inside the connector body, so that the connector body and the locking cap 300 are connected;

[0046] Due to the particularity of the structural arrangement, when the clamping ring 400 is not installed, the hook portion 320 can move axially inside the joint body, making the installation of the pipe unstable;

[0047] The clamping ring 400 is installed, and the first end 401 of the clamping ring 400 extends into the transition groove 301 and is supported on the lower end surface of the outer cap 310, pushing the outer cap 310 outward so that the entire locking cap 300 has a tendency to move outward.

[0048] In this embodiment, in order to prevent the locking cap 300 from falling out of the connector body, a limiting edge 210 is provided toward the center of the pipe insertion opening a of the connector body. The limiting edge 210 limits the hook 320 in the connector body.

[0049] The limiting edge 210 is arranged in an annular shape, and its inner diameter is smaller than the outer diameter of the outermost end of the hook 320. The hook 320 cannot move beyond the limiting edge 210 to the outside of the pipe insertion port a, but can only move within the joint body, thereby limiting the hook 320.

[0050] In this embodiment, the joint body includes a joint body 100 and a shrinking sleeve 200 wrapped around the joint body 100, and the shrinking area of the shrinking sleeve 200 extends to the outside of the pipe insertion port a;

[0051] The clamping ring 400 is supported on the outer surface of the necking area of the necking sleeve 200;

[0052] The limiting edge 210 is located at the end of the necking area.

[0053] Specific reference Figure 4 and Figure 5 As shown, in this embodiment, the main body of the necking sleeve 200 is wrapped around the connector body 100, the large diameter end of the necking area is wrapped around the connector body 100 near the pipe insertion port a, and the small diameter end extends to the outside of the connector body 100. The limiting edge 210 is formed by bending the end of the necking area on the necking sleeve 200 toward the center, and the hook 320 extends into the necking sleeve 200 and is limited inside the necking sleeve 200.

[0054] In this embodiment, the pipe is locked by the locking cap 300 , and the specific implementation is as follows: a clamping rib 321 is provided on the inner wall of the hook portion 320 .

[0055] Specific reference Figure 4 As shown, the clamping rib 321 is a convex rib protruding from the inner wall of the hook portion 320 and is arranged as an arc strip along the circumferential direction. When the pipe is inserted, the outer wall of the pipe and the clamping rib 321 are interference fit, thereby completing the locking of the pipe by the locking cap 300.

[0056] In order to prevent the clamping rib 321 from scratching the outer surface of the pipe, in this embodiment, the outer end of the clamping rib 321 is bent toward the inside of the joint body 100.

[0057] That is, the cross section of the clamping rib 321 is set to an arc surface, so that the outer wall of the pipe is in contact with the arc surface, thereby preventing the end of the clamping rib 321 from making line contact with the pipe and scratching the surface of the pipe.

[0058] In this embodiment, a locking piece 220 is provided on the inner wall of the shrink sleeve 200 , and a locking groove capable of accommodating the locking piece 220 is provided on the connector body 100 .

[0059] Specific reference Figure 4 As shown, the locking piece 220 is arranged on the main body of the shrinking sleeve 200 and is bent toward the inner side of the shrinking sleeve 200. The locking groove is recessed on the outer surface of the connector body 100. The locking piece 220 is inserted into the locking groove to lock the shrinking sleeve 200 relative to the connector body 100.

[0060] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A quick connector anti-drop pipe structure, comprising a connector body having at least two pipe insertion openings (a), wherein the pipe insertion openings (a) are provided with locking caps (300), and the pipes are inserted into the connector body through the locking caps (300) and locked by the locking caps (300); Its characteristics are: It also includes a clamping ring (400), the first end (401) of the clamping ring (400) supports the locking cap (300), and the second end (402) supports the joint body to lock the locking cap (300) and the joint body.

2. The anti-drop pipe structure of the quick connector according to claim 1, characterized in that: The clamping ring (400) is a ring body with a trapezoidal cross section, and the inner diameter of the first end (401) is smaller than the inner diameter of the second end (402).

3. The anti-drop tube structure of the quick connector according to claim 2, characterized in that: The second end (402) of the clamping ring (400) is provided with a plurality of adjustment slots (403).

4. The anti-drop pipe structure of the quick connector according to claim 1, characterized in that: The locking cap (300) comprises an integrally formed outer cap (310) and a hook portion (320), and a transition groove (301) is provided between the outer cap (310) and the hook portion (320), and the first end (401) of the clamping ring (400) extends into the transition groove (301) and is supported on the lower end surface of the outer cap (310).

5. The anti-drop pipe structure of the quick connector according to claim 4, characterized in that: A limiting edge (210) is provided towards the center of the pipe insertion opening (a) of the joint body, and the limiting edge (210) limits the hook portion (320) in the joint body.

6. The anti-drop pipe structure of the quick connector according to claim 5, characterized in that: The joint body comprises a joint body (100) and a shrinking sleeve (200) wrapped around the joint body (100), wherein the shrinking area of the shrinking sleeve (200) extends to the outside of the pipe insertion port (a); The clamping ring (400) is supported on the outer surface of the necking area of the necking sleeve (200); The limiting edge (210) is located at the end of the necking area.

7. The anti-drop pipe structure of the quick connector according to claim 4, characterized in that: A clamping rib (321) is provided on the inner wall of the hook portion (320).

8. The anti-drop tube structure of the quick connector according to claim 7, characterized in that: The outer end of the clamping rib (321) is bent toward the inside of the joint body (100).

9. The anti-drop tube structure of the quick connector according to claim 6, characterized in that: A locking piece (220) is provided on the inner wall of the shrink sleeve (200), and a locking groove capable of accommodating the locking piece (220) is provided on the joint body (100).

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