CN101629663B - Directly-inserted quick connector - Google Patents

Abstract

The invention relates to a directly-inserted quick connector used for solving the problem that a plugging element is easy to fail or the chucking force is insufficient. The directly-inserted quick connector comprises a connector body, an end cover and a lining positioned in the connector body. A sealing ring, a supporting pad, a chucking element and a pressing sleeve are sequentially arranged between the lining and the connector body. After improvement, the chucking element consists of a snap ring and spring rings; the snap ring consists of two split semi-rings; spring grooves opposite to each other are respectively arranged outside the semi-rings; the spring rings are positioned in the spring grooves; one side of the snap ring is provided with an inner conical surface and an outer conical surface; a chamfered-teeth bayonet is formed by the inner conical surface and an inner bevel adjacent to the inner conical surface. The directly-inserted quick connector adopts a chucking element structure formed by combining the two semi-rings with the spring rings, thereby effectively overcoming the defects that the performance after repeated use is poor and the chucking force is insufficient due to the lack of elasticity in a chucking structure. In addition, the lining and the connector body are fixedly connected and assembled by welding, and, compared with interference fit assembly, the fixed connection assembly by welding can lead to more reliable connection and good centering performance.

Description

A kind of in-line push-in connector

technical field

The invention relates to a pipeline connector, in particular to an in-line quick-plug connector used in an automobile air brake pipeline, and belongs to the technical field of pipeline components.

Background technique

Various vehicle air brake pipelines are composed of interconnected hoses and joints, and there are different connection methods between hoses and joints. At present, the coupling liner structure is used more often. Before using this structure, the hose and the coupling liner connector need to be pre-installed together. When loading the vehicle, the coupling nut is connected to the joint on the vehicle. This connection method is time-consuming and labor-intensive, and there are many interfaces, and the sealing is not easy to guarantee. There are also quick-plug connectors that use male-female connections. Before using this structure, the hose and the male connector must be pre-installed together through the bamboo joints. There is an interface, but maintenance is very inconvenient. The third type is the in-line joint. This structure can realize quick plug-in and disassembly of pipe fittings, and is more convenient to use. Due to copper quality and structural problems, the copper ring and copper sleeve are likely to cause clamping failure after continuous plugging and unplugging, and the steel card structure cannot meet the pull-off force requirements because the card is thin. It is convenient to plug in, but it is still less used in the field of automobile pipelines.

Contents of the invention

The present invention solves the defects of the above-mentioned prior art and provides a reusable, stable and reliable in-line push-in connector.

The said problem of the present invention is solved by the following technical solutions:

An in-line push-in joint, which consists of a joint body, an end cap and a bushing located in the joint body, and a sealing ring, a support pad, a clamping piece and a compression sleeve are sequentially arranged between the bushing and the joint body , which is special in that: the clamping member is composed of a snap ring and a spring ring, the snap ring is composed of two split half-rings, spring grooves are arranged on the outer sides of each half-ring corresponding to each other, and the spring ring is located on the spring In the groove, one side of the snap ring is provided with an inner cone surface and an outer cone surface, and the inner cone surface and the inner inclined surface adjacent to it form a bayonet bayonet.

In the above-mentioned in-line quick-plug connector, the snap ring is provided with a positioning ring, and the two ends of the positioning ring are in contact with the support pad and the compression sleeve respectively.

In the above-mentioned in-line push-in joint, one side of the bush is welded to the joint body.

In the above-mentioned in-line quick-plug connector, the sealing rings are O-shaped sealing rings, two of which are provided, and a septum is arranged between the two sealing rings.

The present invention improves on the problem that the continuous plug-in type joint is easy to fail or the clamping force is insufficient. It eliminates the disadvantages of poor repeated use performance and insufficient clamping force caused by the lack of elasticity of the clamping structure itself. In addition, adding a positioning ring outside the clamping ring can ensure that the position of the clamping part is fixed; 2. The bushing and the joint body are welded. Compared with the general interference fit assembly, it has more reliable connection performance and excellent centering; 3. The above-mentioned clamping parts are arranged inside the joint body, and the hose cannot be removed without a special pipe unloader, so The safety performance of the plug is greatly increased. The invention solves the disadvantages of the in-line connector while retaining the advantages of the in-line connector. Compared with other existing vehicle pipeline plugs, its superior performance is self-evident.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of a clamping member;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is a schematic diagram of the plug-in connection between the in-line push-in connector and the hose of the present invention.

The labels in the drawings are as follows: 1. End cap; 2. Compression sleeve; 2-1. Compression cone; 3. Snap ring; 3-1. Outer cone; 3-2. Inner cone; 3. Inner slope; 3-4. Spring groove; 4. Spring ring; 5. Locating ring; 6. Support pad, 7. Seal ring; 8. Septum; Tube.

Detailed ways

Referring to Fig. 1, the composition of the present invention includes a joint body 9, an end cap 1 and a bushing 10 located in the joint body for supporting the hose, and a sealing ring 7, a support pad 6, and a locking ring are sequentially arranged between the bushing and the joint body. Parts and compression sleeve 2, wherein the clamping part is the key technology of the present invention.

Referring to Figures 1-3, the clamping member is composed of a snap ring 3 and a spring ring 4, the snap ring is composed of two split half-rings, and spring grooves 3-4 are arranged on the outside of each half-ring corresponding to each other, and the spring ring Namely be located in this spring groove, be provided with inner cone surface 3-2, outer cone surface 3-1 on one side of clasp ring, form inverted tooth bayonet by inner cone surface and its adjacent inner slope 3-3. This kind of split clasp combined with a spring ring structure with good elasticity provides a guarantee for the repeated use of the clamping parts, and effectively solves the elastic problem of clamping failure after continuous plugging and unplugging of the existing in-line connector copper sleeve and copper split clasp. , At the same time, it also solves the problem that the clamping force of the steel card is too small to meet the pull-out force requirement. A positioning ring 5 is arranged outside the snap ring 3 , and the two ends of the positioning ring are in contact with the support pad 6 and the compression sleeve 2 respectively. The function of the positioning ring is to fix the position of the snap ring, to ensure the alignment between the snap ring and the bushing, so as to facilitate the insertion of the hose. Two O-rings 7 are used in the body of the plug for sealing, and the spacer 8 separates the two sealing rings, so that the sealing rings can play a better sealing role; the support pad 6 is used to support the snap ring and the positioning ring to simultaneously hold the two The sealing ring and the small spacer are positioned in a fixed space; the compression sleeve 2 is provided with a compression cone surface 2-1 matching the outer cone surface of the snap ring. It can be seen from Fig. 1 that the bushing and the joint body of the present invention are connected by welding, and this connection method has higher reliability and better alignment than the commonly used interference fit connection method.

Referring to Fig. 4, when the present invention is used for pipeline insertion, pull out the end cap 1, insert the hose 11 along the bushing 10, and the inner tapered surface 3-2 of the snap ring can play a guiding role during the insertion of the hose. After the hose is inserted, the inverted tooth bayonet of the snap ring clamps the hose under the tightening force of the spring ring 4. When the hose wall thickness reaches a certain depth, the hose and the snap ring are integrated to play a role The function of pre-clamping; when the hose is subjected to outward force, the hose drives the snap ring to move together until the outer cone surface 3-1 of the clasp ring contacts the compression cone surface 2-1 of the compression sleeve 2 , pressing the tapered surface will give the snap ring a tightening force, so that the inverted tooth bayonet of the snap ring will eat deeper into the wall thickness of the hose. When the depth reaches a certain amount, the inner cylindrical surface of the snap ring will contact the outer wall of the hose , Tighten the hose to ensure the pull-out force requirements. After the hose is plugged in, cover the end cap tightly to prevent dust, water and other impurities from entering the connector body. When the hose needs to be repaired and removed, pull off the end cap, use a special pipe unloader to push along the outer wall of the hose to the inner tapered surface of the snap ring, and stretch the snap ring to free the hose from the constraints of the inverted tooth bayonet. The hose can then be pulled out.

Claims (4)

1. An in-line push-in joint, comprising a joint body (9), an end cap (1) and a bushing (10) located in the joint body, and a sealing ring is arranged between the bushing and the joint body in sequence (7), support pad (6), clamping piece and compression sleeve (2), it is characterized in that: described clamping piece is made up of snap ring (3) and spring ring (4), and described snap ring is made up of two The split half-ring is composed of spring grooves (3-4) corresponding to each other on the outside of each half-ring, and the spring ring is located in the spring groove, and the inside of the snap ring is provided with an inner tapered surface (3-2 ), the outer side is provided with an outer conical surface (3-1), and the inner conical surface and its adjacent inner inclined surface (3-3) form a reverse tooth bayonet. 2. The in-line quick-plug connector according to claim 1, the snap ring (3) is provided with a positioning ring (5), and the two ends of the positioning ring are respectively connected with the support pad (6) and the compression sleeve (2) contact. 3. The in-line push-in connector according to claim 1 or 2, characterized in that: one side of the bush (10) is welded to the connector body (9). 4. The in-line push-in connector according to claim 3, characterized in that: the sealing ring (7) is an O-shaped sealing ring, two are provided, and a spacer (8) is arranged between the two sealing rings.

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