GB2565170A - Hydraulic quick connector - Google Patents
Hydraulic quick connector Download PDFInfo
- Publication number
- GB2565170A GB2565170A GB1721373.7A GB201721373A GB2565170A GB 2565170 A GB2565170 A GB 2565170A GB 201721373 A GB201721373 A GB 201721373A GB 2565170 A GB2565170 A GB 2565170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nipple
- coupling sleeve
- quick connector
- hydraulic quick
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000008878 coupling Effects 0.000 claims abstract description 48
- 238000010168 coupling process Methods 0.000 claims abstract description 48
- 238000005859 coupling reaction Methods 0.000 claims abstract description 48
- 210000002445 nipple Anatomy 0.000 claims abstract description 42
- 230000037431 insertion Effects 0.000 claims abstract description 20
- 238000003780 insertion Methods 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00
- F16L25/01—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00 specially adapted for realising electrical conduction between the two pipe ends of the joint or between parts thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls, or other movable or insertable locking members
- F16L37/14—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/22—Couplings of the quick-acting type in which the connection is maintained by means of balls, rollers or helical springs under radial pressure between the parts
- F16L37/23—Couplings of the quick-acting type in which the connection is maintained by means of balls, rollers or helical springs under radial pressure between the parts by means of balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
A hydraulic quick connector 40 comprises a coupling sleeve 2, a nipple 1 and a releasable lock 42 which also acts as an electric contact ring for electrical contact between the coupling sleeve and the nipple when inserted. The contact ring is mounted in a circumferential groove 41 in the coupling sleeve, and is a coiled wire having at least one winding with a discontinuous curvature. The coiled wire can have straight portions connected by bent portions, with the straight portions being of equal length and the bent portions of equal shape, such that in axial view the contact ring has a polygonal shape. The diameter of the inscribed circle of the contact ring can be smaller than the outer diameter of the inserted end of the nipple, and the diameter of the circumscribed circle of the coiled wire can be smaller than the diameter of the bottom of the circumferential groove and larger than the inner diameter of a coupling end of the coupling sleeve. The thickness of the coiled wire can be equal or greater than the depth of the circumferential groove. The insertion end of the nipple can have a rounded leading edge.
Description
Hydraulic quick connector
The invention relates to a hydraulic quick connector comprising :
- a coupling sleeve having a coupling end and an opposite connection end for connection with a fluid line;
- a nipple having an insertion end and a connection end for connection with a fluid line, which nipple is insertable with the insertion end into the coupling sleeve at the coupling end;
- a releasable lock for blocking the nipple in an inserted position, wherein the nipple is inserted into the coupling sleeve.
Hydraulic quick connectors are widely known and used for connecting hydraulic lines, which also require to be disconnected. Typically such quick connectors have a releasable lock with an axially movable operating sleeve, which allows or blocks balls arranged in the coupling sleeve, which balls also protrude in a groove of the nipple, such that the nipple can be locked in the coupling sleeve and can be released by moving the operating sleeve allowing the balls to move out of the groove in the nipple and allowing the nipple to be retracted from the coupling sleeve. However other releasable locks are also known for hydraulic quick connectors .
For certain applications it is required that the hydraulic lines are hydraulically connected but also electrically connected, for example in automotive applications. With typical hydraulic quick connectors, rubber seals are used between the coupling sleeve and the nipple to provide a leak tight connection, but this also results in that it is not ensured that a reliable electric connection is provided.
Other connectors are known for connection hydraulic lines, but such connectors are not releasable. For example US 2017040717 and DE 102005013981 describe such a quick connector for quickly connecting hydraulic lines. The quick connectors do not comprise a releasable lock, so after inserting a nipple into the coupling sleeve, the connection is permanent. The above mentioned prior art does use an electric contact ring to ensure an electric contact between the nipple and the coupling sleeve and therewith to ensure electric contact between connected hydraulic lines.
None of the electric contact rings are suitable for a releasable connection. The ring of DE 102005013981 locks into a groove after insertion, preventing retraction of the nipple, whereas the electric contact ring of US 2017040717 has a complex structure and requires a number of ribs and grooves in the connection sleeve. When a known hydraulic quick connector is to be adapted for an electric contact ring as known in US 2017040717, a substantial redesign is required of the hydraulic quick connector, which is typically undesired.
Therefore, it is an object of the invention to reduce or even remove the above mentioned disadvantages.
This object is achieved with a hydraulic quick connector according to the preamble, which hydraulic quick connector is characterized by an electric contact ring for ensuring electrical contact between the coupling sleeve and the nipple in the inserted position, which contact ring is mounted in a circumferential groove arranged in the coupling sleeve, wherein the contact ring is a coiled wire having at least one winding with a discontinuous curvature.
Using a coiled wire with a discontinuous curvature provides the possibility to create a circumscribed circle radius and an inscribed circle radius of which the difference is larger than the wire diameter. As a result, the coiled wire with discontinuous curvature can be clamped on the nipple and in the coupling sleeve. The discontinuous curvature further enables deformation of the coiled wire within the boundaries of the circumscribed circle and inscribed circle, which in turn provides the desired contact force on both the nipple and the coupling sleeve to provide a reliable electrical contact between both parts of the hydraulic quick connector.
In an embodiment of the hydraulic quick connector according to the invention the coiled wire has straight portions connected by bent portions.
By varying the number of straight portions and bent portions, an electrical contact ring is obtained, wherein the stiffness of the ring can be varied for a given wire, i.e. diameter and material.
In a preferred embodiment of the hydraulic quick connector according to the invention the straight portions are of equal length and the bent portions are of substantially equal shape, such that the electric contact ring has in axial view a polygonal shape.
Using conventional wire bending machines, the coiled wire with polygonal shape can easily be made. Furthermore, the number bends provide for reliable contact points with the coupling sleeve, while the number of straight portions ensure a reliable number of contact points with the nipple. So, with this embodiment the number of contact points of the electric contact ring is easily predefined.
In a further embodiment of the hydraulic quick connector according to the invention the diameter of the inscribed circle of the coiled wire is smaller than the outer diameter of the insertion end of the nipple. This ensures that when the nipple is inserted into the coupling sleeve, the electric contact ring will always be clamped on the nipple ensuring good electrical contact.
In yet another embodiment of the hydraulic quick connector according to the invention the diameter of the circumscribed circle of the coiled wire is smaller than the diameter of the bottom of the circumferential groove and larger than the inner diameter of the coupling end of the coupling sleeve. Preferably, the thickness of the wire is equal or larger than the depth of the circumferential groove.
In this embodiment the coiled wire is accommodated in the circumferential groove and even when it is deformed by insertion of the nipple, it will still protrude partially out of the groove, as the depth of the groove is less than the thickness of the wire.
In still another embodiment of the hydraulic quick connector according to the invention the insertion end of the nipple has a rounded leading edge.
The rounded leading edge facilitates insertion of the connection end of the nipple into the electric contact ring and facilitates deformation of the ring, such that a good electrical contact is obtained between the nipple and the coupling sleeve.
These and other features of the invention will be elucidated in conjunction with the accompanying drawings.
Figure 1 shows a perspective view with cut away portions of a prior art hydraulic quick connector.
Figures 2A and 2B show a perspective view with cut away portions of an embodiment of the invention.
Figures 3A and 3B show respectively front and side view of the electric contact ring of the embodiment of figures 2A and 2B.
| Figure | 4 shows a front view of a second embodiment |
| of an electrical | contact ring for an hydraulic quick connector |
| according to the | invention . |
| Figure | 1 shows a perspective view of a prior art |
hydraulic quick connector having a nipple 1 and a coupling sleeve 2. The nipple 1 has an insertion end 3 and a connection end 4 for connection with a fluid line. The connection can for example be embodied as a shrink fit or with a thread. The nipple 1 has furthermore a flange 5, with which the nipple 1 can be locked into the coupling sleeve 2.
The coupling sleeve 2 has also a connection end 6 for connection with a fluid line. Opposite of the connection end 6 is arranged the coupling end 7. Balls 8 protrude into this coupling end 7, such that after insertion of the insertion end 3 the balls 8 will lock behind the flange 5. The operating sleeve 9, which is slidable over the coupling sleeve 2 prevents the balls 8 from moving out of engagement with the flange 5, until the operating sleeve 9 is slid against the force of the spring 10. Furthermore, a seal 11 is arranged in the coupling sleeve 2 to ensure a leakproof connection.
Figure 2A shows an embodiment 40 according to the invention. This embodiment 40 corresponds largely with the hydraulic quick connector 1, 2 shown in figure 1. The coupling sleeve 2 has a circumferential groove 41 arranged in the coupling end 7 of the coupling sleeve 2. An electric contact ring 42, which is a coiled wire, is mounted in the circumferential groove 41.
When a nipple 1 is inserted with the insertion end 3 into the coupling end 7, the insertion end 3 will extend through the ring 42 (see figure 2B) such that the ring 42 is both in contact with the insertion end 3 and the circumferential groove 41 and a reliable electrical contact is established between the coupling sleeve 2 and the nipple 1.
Figure 3A shows a front view of the ring 42. This ring 42 is a coiled wire having straight portions 43 and bend portions 44, such that a polygonal shape is obtained.
With the polygonal shape, the ring 42 has an inscribed circle with diameter Di and a circumscribed circle with diameter D2. Due to the polygonal shape the difference between the diameter Di and D2 is more than twice the wire diameter Dw. As a result, the ring 42 can expand/deform when the insertion end 3 with diameter Dn of the nipple 1 is inserted into the ring 32. This ensures that the ring 42 is clamped onto the nipple 1 and also pushed in contact with the circumferential groove 41.
Figure 4 shows a front view of a second embodiment of an electrical contact ring 50. In this electrical contact ring 50, only three straight portions 51 are provided per winding, which straight portion 51 are connected with bend portions 52, which have a substantial longer length, than the bend portions 44 of the ring 42 of figures 3A and 3B. As a result, the ring 50 will be more stiff than the ring 42 when made from the same wire.
Due to the straight portions 51 the difference between the diameter Di and D2 is still more than the wire thickness, such that ring 50 can deform when an insertion end of a hydraulic coupling according to the invention is inserted into the ring 50, while being housed in a groove of the coupling part and provide good electrical contact.
Claims (7)
1. Hydraulic quick connector comprising:
- a coupling sleeve having a coupling end and an opposite connection end for connection with a fluid line;
- a nipple having an insertion end and a connection end for connection with a fluid line, which nipple is insertable with the insertion end into the coupling sleeve at the coupling end; and
- a releasable lock for blocking the nipple in an inserted position, wherein the nipple is inserted into the coupling sleeve;
characterized by
- an electric contact ring for ensuring electrical contact between the coupling sleeve and the nipple in the inserted position, which contact ring is mounted in a circumferential groove arranged in the coupling sleeve, wherein the contact ring is a coiled wire having at least one winding with a discontinuous curvature.
2. Hydraulic quick connector according to claim 1, wherein the coiled wire has straight portions connected by bent portions.
3. Hydraulic quick connector according to claim 2, wherein the straight portions are of equal length and wherein the bent portions are of substantially equal shape, such that the electric contact ring has in axial view a polygonal shape.
4. Hydraulic quick connector according to any of the preceding claims, wherein the diameter of the inscribed circle of the coiled wire is smaller than the outer diameter of the insertion end of the nipple.
5. Hydraulic quick connector according to any of the preceding claims, wherein the diameter of the circumscribed circle of the coiled wire is smaller than the diameter of the bottom of the circumferential groove and larger than the inner diameter of the coupling end of the coupling sleeve.
6. Hydraulic quick connector according to claim 5, wherein the thickness of the wire is equal or larger than the depth of the circumferential groove.
5
7. Hydraulic quick connector according to any of the preceding claims, wherein the insertion end of the nipple has a rounded leading edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2018/070354 WO2019025296A2 (en) | 2017-08-04 | 2018-07-26 | Hydraulic quick connector |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN201711027899 | 2017-08-04 | ||
| GBGB1719019.0A GB201719019D0 (en) | 2017-11-17 | 2017-11-17 | Hydraulic quick connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201721373D0 GB201721373D0 (en) | 2018-01-31 |
| GB2565170A true GB2565170A (en) | 2019-02-06 |
Family
ID=61008743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1721373.7A Withdrawn GB2565170A (en) | 2017-08-04 | 2017-12-20 | Hydraulic quick connector |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2565170A (en) |
| WO (1) | WO2019025296A2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941756B (en) * | 2022-07-26 | 2022-10-21 | 南通希尔顿博世流体设备有限公司 | Fastening joint for connecting fluid pipeline |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5792990A (en) * | 1992-04-03 | 1998-08-11 | Bertoldo & C. S.R.L. | Coupling for metal tubes |
| US20030090109A1 (en) * | 2001-11-12 | 2003-05-15 | Ostrander James E. | Fluid quick connector with secure electrical contact |
| US20030092324A1 (en) * | 2001-11-12 | 2003-05-15 | Walker Daniel H. | Electrical contact for fluid quick connectors |
| US20130081734A1 (en) * | 2011-09-29 | 2013-04-04 | The Boeing Company | Electrostatic Bonding of Coaxial Tubing |
| US20140219713A1 (en) * | 2013-01-25 | 2014-08-07 | Bal Seal Engineering, Inc. | Coil springs with complex coil configurations, assemblies with coil springs, and related methods |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2037725B1 (en) * | 1970-07-29 | 1971-08-26 | Fa Carl Kurt Walterh | Electrically conductive quick coupling for hoses and pipes |
-
2017
- 2017-12-20 GB GB1721373.7A patent/GB2565170A/en not_active Withdrawn
-
2018
- 2018-07-26 WO PCT/EP2018/070354 patent/WO2019025296A2/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5792990A (en) * | 1992-04-03 | 1998-08-11 | Bertoldo & C. S.R.L. | Coupling for metal tubes |
| US20030090109A1 (en) * | 2001-11-12 | 2003-05-15 | Ostrander James E. | Fluid quick connector with secure electrical contact |
| US20030092324A1 (en) * | 2001-11-12 | 2003-05-15 | Walker Daniel H. | Electrical contact for fluid quick connectors |
| US20130081734A1 (en) * | 2011-09-29 | 2013-04-04 | The Boeing Company | Electrostatic Bonding of Coaxial Tubing |
| US20140219713A1 (en) * | 2013-01-25 | 2014-08-07 | Bal Seal Engineering, Inc. | Coil springs with complex coil configurations, assemblies with coil springs, and related methods |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019025296A3 (en) | 2019-04-18 |
| WO2019025296A2 (en) | 2019-02-07 |
| GB201721373D0 (en) | 2018-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20190411 AND 20190417 |
|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |