Anti-detachment quick-release oil pipe joint structure

Abstract

A quick-release oil pipe connector structure with anti-dislodgement features a connector body, a plurality of positioning steel balls, an inner liner, a first spring, a outer shell, a second spring, a retaining ring, and an anti-failure steel ball. The connector body has a plurality of through holes in its pipe wall. The plurality of positioning steel balls are respectively and movably disposed in the through holes. The first spring is disposed between the inner liner and the connector body, and the second spring is disposed between the outer shell and the connector body. The retaining ring and the anti-failure steel ball are disposed in the pipe wall. When the male connector is inserted into the connector body via the mating interface, the male connector pushes the inner liner away from the mating interface, and the inner liner pushes the first spring. The positioning steel balls move inwards towards the inner circumferential surface and respectively engage with an annular recess of the male connector. The outer shell is confined between the retaining ring and the anti-failure steel ball.

Claims

1. A quick-release oil pipe joint structure to prevent detachment, comprising: A connector body includes a pipe wall and a mating end forming a pair of interfaces. The pipe wall has an outer peripheral surface and an inner peripheral surface, which are disposed opposite to each other. The inner peripheral surface surrounds and forms a mating space. The pipe wall has a plurality of through holes and a plurality of receiving recesses. The through holes are disposed close to the mating interface, and the receiving recesses are disposed away from the mating interface. The axial direction of each through hole is parallel to the radial direction of the pipe wall. A plurality of positioning steel balls are respectively and movably disposed in the through holes, and the diameter of each positioning steel ball is greater than the thickness of the pipe wall. An inner liner is movably disposed on the inner peripheral surface of the pipe wall and can abut against the positioning steel balls. A first spring is disposed between the inner liner and the connector body. A housing, axially movable and rotatable, is disposed on the outer peripheral surface of the pipe wall. The housing abuts against the positioning steel ball. The housing has a stop edge located on the side of the housing away from the mating interface and close to the receiving recesses. A second spring is disposed between the housing and the connector body. A retaining ring is disposed on the outer peripheral surface close to the mating interface. A plurality of anti-failure steel balls are respectively fixed in the receiving recesses of the pipe wall and protrude from the outer peripheral surface of the pipe wall. When a male connector is inserted into the connector body via the interface, the male connector pushes the inner liner to move away from the interface and the inner liner pushes the first spring. The positioning steel balls move towards the inner circumferential surface and respectively engage with an annular recess of the male connector. The outer shell abuts against the positioning steel balls, so that the positioning steel balls are positioned in the annular recess of the male connector. Moreover, the stop edge of the outer shell abuts against the anti-failure steel balls, so that the outer shell is positioned and confined between the anti-failure steel balls and the retaining ring.

2. The anti-detachment quick-release oil pipe connector structure as claimed in claim 1, wherein the outer shell further has a plurality of clearance recesses formed on the stop edge, wherein when the male connector is disengaged from the connector body, the first spring pushes the inner liner and the second spring pushes the outer shell, such that the inner liner and the outer shell respectively hold the steel balls in the through holes from opposite ends of the steel balls, and the outer shell is rotated to a suitable position such that the clearance recesses respectively engage with the anti-failure steel balls.

3. The anti-detachment quick-release oil pipe joint structure as described in claim 2, wherein the clearance recesses are recessed inward along the axial direction of the housing from the edge of the stop; when the positioning steel ball is located in the annular recess and the housing abuts against the positioning steel ball, the anti-failure steel ball is respectively misaligned with the clearance recesses.

4. The anti-detachment quick-release oil pipe joint structure as described in claim 2, wherein the pipe wall of the joint body has a first mark on the outer peripheral surface, the first mark corresponding to one of the anti-failure steel balls, and the outer peripheral surface of the outer shell has a second mark, the second mark corresponding to one of the clearance recesses, wherein when the first mark and the second mark are aligned, the clearance recesses can be moved to engage with the anti-failure steel ball.

5. The anti-detachment quick-release oil pipe joint structure as described in claim 1, wherein the pipe wall of the joint body further includes a stepped portion adjacent to the inner circumferential surface, the end of the first spring away from the mating interface abuts against the stepped portion, and an outer circumferential surface of the male end abuts against a circumferential surface of the stepped portion near an axis of the joint body.

6. The anti-detachment quick-release oil pipe joint structure as described in claim 5 further includes a plurality of sealing rings disposed on the circumferential surface of the stepped portion near the axis of the joint body, and the outer circumferential surface of the male end joint abuts against the sealing rings.

7. The anti-detachment quick-release oil pipe connector structure as described in claim 5, wherein the liner has a first receiving recess formed at one end of the liner away from the interface, and the end of the first spring away from the step portion is received in the first receiving recess; the liner further has a first engaging recess formed at one end of the liner near the interface, wherein when the male connector is disengaged from the connector body, the first engaging recess engages and clamps one end of the positioning steel balls.

8. The anti-detachment quick-release oil pipe joint structure as claimed in claim 1, wherein the pipe wall of the joint body further includes a flange portion adjacent to the outer peripheral surface, and the end of the second spring away from the interface abuts against the flange portion.

9. The anti-detachment quick-release oil pipe connector structure as claimed in claim 8, wherein the housing has a second receiving recess formed at one end of the housing away from the mating interface, and the end of the second spring away from the flange is received in the second receiving recess; the housing further has a second engaging recess formed at one end of the housing near the mating interface, wherein when the male connector is disengaged from the connector body, the second engaging recess engages and clamps one end of the positioning steel balls.

10. The anti-detachment quick-release oil pipe joint structure as described in claim 1, wherein the retaining ring is located between the interface and the positioning steel balls.

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