Quick coupling

Abstract

This invention relates to a quick connector, comprising: a first connector made of metal, wherein an inner wall of the first connector defines a first channel, and the inner wall is provided with a positioning ring groove; a first valve assembly disposed in the first channel; a second connector comprising a body and a positioning ring, the body being made of metal, the body including a first connecting pipe and a second connecting pipe, the first connecting pipe having an insertion end, the outer periphery of the insertion end being provided with an annular groove, the positioning ring being embedded in the annular groove, the insertion end being detachably inserted into the first channel and the positioning ring radially protruding from the annular groove and detachably radially engaging into the positioning ring groove, the first connecting pipe having a second channel; and a second valve assembly disposed in the second channel.

Claims

1. A quick connector, comprising: A first connector, made of metal, has an inner tube wall defining a first channel, and the inner tube wall has a positioning ring groove; a first valve assembly, movably disposed in the first channel relative to the first channel; a second connector, including a body and a positioning ring, the body being made of metal, the body including a first connecting pipe and a second connecting pipe, the first connecting pipe having an insertion end, the outer periphery of the insertion end having an annular groove, the positioning ring being embedded in the annular groove, the insertion end being detachably inserted into the first channel and the positioning ring radially protruding from the annular groove and detachably radially engaging with the positioning ring groove, the first connecting pipe having a second channel, the second connecting pipe forming a gradually expanding flow channel, the gradually expanding flow channel gradually expanding in the direction of the second channel; and a second valve assembly, movably disposed in the second channel; The positioning ring groove has a first opening that opens radially toward the ring groove, and the ring groove has a second opening that opens radially toward the positioning ring groove. The diameter of the first opening is larger than the diameter of the second opening. The first channel includes a large-diameter section and a small-diameter section arranged sequentially in a direction away from the second connector. The large-diameter section is provided with the positioning ring groove. A guide slope connects the large-diameter section and the small-diameter section. The guide slope extends inwardly from the large-diameter section toward the small-diameter section. An annular groove is provided on the outer periphery of the insertion end. The second connector also includes a sealing ring. The sealing ring is fitted into the annular groove and protrudes radially from the annular groove. The sealing ring abuts against the guide slope and radially presses against the inner circumferential surface of the small-diameter section.

2. The quick connector as claimed in claim 1, wherein the first connector further includes a mating end into which the second connector is inserted, the mating end forming a tapering channel that communicates with the expanding channel and tapers away from the expanding channel.

3. The quick connector as claimed in claim 1, wherein the second valve assembly includes a second valve body and a second elastic member, the second valve body being movably disposed in the second channel, and the second elastic member abutting between the second valve body and an inclined wall of the expanding flow channel.

4. The quick connector as claimed in claim 1, wherein the first connector includes a body and a third connector, the body having a first threaded end, the third connector having a second threaded end, the second threaded end being sleeved on and threaded to the first threaded end, the first threaded end having an external thread structure, and the second threaded end having an internal thread structure threaded to the external thread structure.

5. The quick connector as claimed in claim 4, wherein the body includes a flared channel, the first threaded end forming the flared channel, the flared channel communicating with the third connector, the flared channel radially corresponding to the external thread structure, the flared channel flaring toward and communicating with the third connector.

6. The quick connector as claimed in claim 1, wherein the positioning ring is a rubber ring.

7. The quick connector as claimed in claim 1, wherein the insertion end includes an expanded diameter section and a narrow diameter section, the narrow diameter section being further away from the second connecting pipe than the expanded diameter section, a wall thickness of one of the expanded diameter sections being greater than a wall thickness of one of the narrow diameter sections, an annular groove being recessed on the outer periphery of the expanded diameter section, an annular groove being disposed on the narrow diameter section, a first opening of the annular groove being higher than a third opening of one of the annular grooves, and a depth dimension of the annular groove being greater than a depth dimension of one of the annular grooves.

8. The quick connector as claimed in claim 5, wherein the first connecting pipe further includes a coupling end into which the second connecting pipe is inserted, the coupling end forming a tapering channel communicating with the expanding channel and tapering away from the expanding channel; the second valve assembly includes a second valve body and a second elastic member, the second valve body being movably disposed in the second channel, the second elastic member abutting between the second valve body and an inclined wall of the expanding channel; the positioning ring is a rubber ring; the body defines the first channel, the first valve assembly includes a first valve body and a first elastic member, the first valve body being movably disposed in the first channel, the first elastic member abutting between the first valve body and the body, one end of the second valve body normally protruding from the first connecting pipe; when the insertion end is inserted into the first channel, the second valve body and the first valve body are movably abutting between them. The third connector is moved to connect with the second connector; when the insertion end is removed from the first channel, the first elastic member pushes the first valve body to reset, thereby blocking the first channel and the expanding channel, and the second elastic member pushes the second valve body to reset, thereby blocking the expanding flow channel and the second channel; the third connector defines a boundary line, which is parallel to the central axis of one of the third connectors, and the boundary line extends axially along the outer peripheral surface of one of the third connectors through the outer peripheral surface of one of the body, the outer peripheral surface of one of the second connectors, and the outer peripheral surface of one of the first connectors; the bottom of one of the annular grooves is flush with or lower than the bottom of one of the annular grooves; the positioning annular groove has an arc concave wall, and the positioning ring has an arc convex wall, the arc convex wall and the arc concave wall abut radially, and the radius of curvature of the arc convex wall is smaller than the radius of curvature of the arc concave wall; the width dimension of one of the annular grooves is smaller than the height dimension of one of the annular grooves.

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