Fluidic connection element and fluidic connection

Abstract

Fluidic connection element and fluidic connection. Fluidic connection element (1), comprising: a body (2); locking balls (3); a locking ring (5), which slides with the body (2) and has an internal radial overlap surface (51) for retaining and releasing the locking balls (3); a washer (7), for guiding the sliding of the locking ring (5), interposed between the body (2) and the locking ring (5), a spring (63) being interposed between the body (2) and the washer (7) to repel the locking ring (5) via a rear surface (57). The minimum internal diameter (D53) of the locking ring (5) behind the rear surface (57) is greater than or equal to the external diameter (D72) of the washer (7). The internal diameter (D71) of the washer (7) is strictly less than the diameter (D51) of the internal radial overlap surface (51). Figure for the abbreviation: Figure 1

Claims

1. Demands Fluidic connection element (1; 101; 201), comprising: • a body (2; 102) centered on a longitudinal axis (X2; XI02), delimiting an internal conduit (20; 120) and intended to be connected to a pipe (12), the internal conduit (20; 120) opening out of the body (2; 102) at an inlet (21; 121) of the body (2; 102), following a forward longitudinal direction (AV2; AV102) parallel to the longitudinal axis (X2; XI02), the body (2; 102) being configured to receive a complementary fluidic connection element (80; 180), fitted into the internal conduit (20; 120), via the inlet (21; 121), following a rear longitudinal direction (AR2; AR102) opposite to the forward longitudinal direction (AV2; AV102); • locking balls (3; 103), movable in receiving recesses (28; 128) of the body (2; 102) between: • an internal radial locking position, in which the locking balls (3; 103) protrude into the internal conduit (20; 120) to oppose withdrawal of the complementary fluidic connection element (80; 180) from the internal conduit (20; 120), in a coupled configuration of the fluidic connection element (1; 101; 201) and the complementary fluidic connection element (80; 180), and • an external radial unlocking position, in which the locking balls (3; 103) do not oppose the removal of the complementary fluidic connection element (80; 180) from the body (2; 102); • a locking ring (5; 105; 205), the body (2; 102) and the locking ring (5; 105; 205) being shaped so that the locking ring (5; 105; 205) is mounted around the body (2; 102) by engaging around the body (2; 102) through the opening (21; 121) along the rear longitudinal direction (AR2; AR102), the locking ring (5; 105; 205) thus mounted being sliding relative to the body (2; 102) along the longitudinal axis (X2; X102), between: • an advanced holding position, in which an internal radial overlap surface (51; 151), belonging to the locking ring (5; 105; 205), is able to cooperate with the locking balls (3; 103) to hold the locking balls (3; 103) in the internal radial locking position, the minimum internal diameter (D53, D55; D153) of the locking ring (5; 105; 205) behind the internal radial overlap surface (51; 151) being strictly greater than the diameter (D51) of the internal radial overlap surface (51; 151), and • a retracted release position, in which the locking ring (5; 105; 205) does not impede the mobility of the locking balls (3; 103) towards their external radial unlocking position; and • a spring (63; 163), mounted around the body (2; 102) and capable of pushing the locking ring (5; 105; 205) towards the advanced holding position; characterized in that: • the fluidic connection element (1; 101; 201) further includes a washer (7; 107; 207), interposed radially between the body (2; 102) and the locking ring (5; 105; 205), the spring (63; 163) being interposed longitudinally between the body (2; 102) and the washer (7; 107; 207), while the washer (7; 107; 207) is able to bear against a rear surface (57; 157) of the locking ring (5; 105; 205) in the forward longitudinal direction (AV2; AV102) to push the locking ring (5; 105; 205) towards the advanced holding position; • the minimum internal diameter (D53, D55; D153) of the locking ring (5; 105; 205) behind the rear surface (57; 157) is greater than or equal to the external diameter (D72; D172) of the washer (7; 107; 207); the internal diameter (D71; D171) of the washer (7; 107; 207) is strictly less than the diameter (D51) of the internal radial overlap surface (51; 151) of the locking ring (5; 105; 205); in all longitudinal positions of the locking ring (5; 105; 205) relative to the body (2; 102) between the forward holding position and the rearward release position: • the washer (7; 107; 207) is suitable for radial cooperation with a first internal radial surface (53; 153; 253) of the locking ring (5; 105; 205) and with a first external radial surface (29; 129) of the body (2; 102) for the radial guidance of the locking ring (5; 105; 205) relative to the body (2; 102), and • the locking ring (5; 105; 205) is able to cooperate radially with a second external radial surface (34; 134) of the body (2; 102) for the radial guidance of the locking ring (5; 105; 205) relative to the body (2; 102), the diameter (D34; DI34) of the second external radial surface (34; 134) being strictly greater than the diameter (D29; D129) of the first external radial surface (29; 129); the body (2; 102) forms in one piece the mouthpiece (21; 121), the receiving chambers (28; 128) and the second external radial surface (34; 134); and the first internal radial surface (53; 153; 253) and the rear surface (57; 157) define an internal counterbore (70; 170; 270) of the locking ring (5; 105; 205) for receiving the washer (7; 107; 207), the internal counterbore (70; 170; 270) being arranged along the front longitudinal direction (AV2; AV102) relative to the second external radial surface (34; 134) and along the rear longitudinal direction (AR2; AR102) relative to the locking balls (3; 103).

2. Fluidic connecting element (1; 101; 201) according to claim 1, wherein the washer (7; 107; 207) is a closed annular ring and wherein the washer (7; 107; 207) and the body (2; 102) are shaped so that the washer (7; 107; 207) is mounted around the body (2; 102) by engagement around the body (2; 102) by the mouth (21; 121) along the rear longitudinal direction (AR2; AR102).

3. Fluidic connecting element (1; 101; 201) according to any one of the preceding claims, wherein: • the locking ring (5; 105; 205) comprises an internal radial clearance wall (54; 154), the internal diameter of which (D54; D154) is strictly greater than the diameter (D53) of the first internal radial surface (53; 153; 253) and which is arranged along the rear longitudinal direction (AR2; AR102) relative to the internal counterbore (70; 170; 270); and • the longitudinal length (L54) of the internal radial clearance wall (54; 154) is greater than the longitudinal length (L70) of the internal counterbore (70; 170; 270).

4. Fluidic connecting element (1) according to claim 3, wherein: • the locking ring (5) comprises a second internal radial surface (55), through which the locking ring (5) cooperates radially with the second external radial surface (34); and • the diameter (D53) of the first internal radial surface (53) and the diameter (D55) of the second internal radial surface (55) are equal; and • the internal radial clearance wall (54) is arranged, parallel to the rear longitudinal direction (AR2), between the first internal radial surface (53) and the second internal radial surface (55).

5. Fluidic fitting element (1; 101; 201) according to any one of the preceding claims, wherein the radial height (H57; H157) of the internal counterbore (70; 170; 270) is between 0.3 times and 0.6 times the maximum radial height (H7; H107) of the washer (7; 107; 207).

6. Fluidic connecting element (1; 101; 201) according to any one of the preceding claims, wherein the internal radial overlap surface (51; 151) opens longitudinally into the internal counterbore (70; 170; 270).

7. Fluidic connecting element (1; 201) according to any one of the preceding claims, wherein the washer (7; 207) has a rectangular external section, forming four edges (73, 74, 76, 77; 273, 274, 276, 277) which are chamfered.

8. Fluidic connecting element (1; 101) according to any one of the preceding claims, wherein the maximum radial height (H7; H107) of the washer (7; 107) is greater than or equal to the maximum longitudinal length (L7; L107) of the washer (7; 107).

9. Fluidic connecting element (1; 101; 201) according to any one of the preceding claims, wherein the radial thickness of the body (2; 102) at the receiving housings (28; 128) is between 0.5 and 0.6 times the diameter (D3) of the locking balls (3; 103).

10. Fluidic connecting element (1; 101) according to any one of the preceding claims, wherein the washer (7; 107) is received in a removable manner in the internal counterbore (70; 170).

11. Fluidic connecting element (1; 101; 201) according to any one of the preceding claims, wherein the maximum radial height (H7; H107; H207) of the washer (7; 107; 207) is greater than or equal to the radial height (H63) of the spring (63; 163).

12. Fluidic connecting element (1) according to any one of the preceding claims, wherein the fluidic connecting element (1) further comprises a valve (40) and a seal (32), which is disposed in a groove (32') formed in the body (2) longitudinally at the height of the second external radial surface (34), the seal (32) being configured to cooperate with the valve (40) when the fluidic connecting element (1) is in an uncoupled configuration.

13. Fluidic fitting, comprising: • the fluidic fitting element (1; 101; 201) according to any one of the preceding claims; and • the complementary fluidic fitting element (80; 180), which comprises a complementary body (81; 181) provided of a locking groove (94; 194), configured to receive the locking balls (3; 103) when the fluidic fitting is in the coupled configuration.

14. Fluidic fitting according to claim 13, wherein: • the complementary body (81; 181) comprises a stepped external surface (91; 191); • the body (2; 102) comprises a stepped internal surface (25; 125), delimiting the internal conduit (20; 120); and • the stepped external surface (91; 191) and the stepped internal surface (25; 125) are configured to cooperate by complementary shapes during the fitting of the complementary fluidic fitting element (80; 180) into the internal conduit (20; 120).

15. Fluidic fitting according to any one of claims 13 or 14, wherein: • the fluidic fitting element (1) further comprises a sleeve (67), which is mounted around the body (2) and the locking ring (5) and which comprises a front end (68), longitudinally fixed to the locking ring (5), and a rear end (69), longitudinally fixed to the body (2), the sleeve (67) being elastically deformed when the locking ring (5) moves between the advanced holding position and the rearward release position; • the complementary fluidic fitting element (80) comprises a sealing gasket (95), which is carried by an external surface (96) of the complementary body (81);and • the locking ring (5) includes a front surface (66), which cooperates longitudinally with the sealing gasket (95) of the complementary fluidic connection element (80) when the fluidic connection is in the coupled configuration.;