GB2565161A - Hydraulic quick connector - Google Patents

Hydraulic quick connector Download PDF

Info

Publication number
GB2565161A
GB2565161A GB1716574.7A GB201716574A GB2565161A GB 2565161 A GB2565161 A GB 2565161A GB 201716574 A GB201716574 A GB 201716574A GB 2565161 A GB2565161 A GB 2565161A
Authority
GB
United Kingdom
Prior art keywords
nipple
contact ring
electrical contact
coupling sleeve
quick connector
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Withdrawn
Application number
GB1716574.7A
Other versions
GB201716574D0 (en
Inventor
Rajan Varma Sumit
Meidlein Jochen
Prakashrao Yerawar Saishwar
S Sameer Nagpure
Sajjan Phalle Vijay
Dipak Punde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Industrial IP GmbH and Co KG
Original Assignee
Eaton Industrial IP GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eaton Industrial IP GmbH and Co KG filed Critical Eaton Industrial IP GmbH and Co KG
Publication of GB201716574D0 publication Critical patent/GB201716574D0/en
Priority to PCT/EP2018/070353 priority Critical patent/WO2019025295A1/en
Publication of GB2565161A publication Critical patent/GB2565161A/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/01—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/005—Electrical coupling combined with fluidic coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H01R4/643—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for rigid cylindrical bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

A hydraulic quick connector 30 comprises a coupling sleeve 6 having a coupling end and an opposite connection end for connection with a fluid line; a nipple 3 having an insertion end and a connection end for connection with a fluid line, which nipple 3 is insertable with the insertion end into the coupling sleeve 6 at the coupling end; a releasable lock (8, figure 1) for blocking the nipple 3 in an inserted position, wherein the nipple 3 is inserted into the coupling sleeve 6; and an electric contact ring 31 for ensuring electrical contact between the coupling sleeve 6 and the nipple 3 in the inserted position, which contact ring 31 is mounted on a cylindrical mounting surface 32, which cylindrical mounting surface 32 is arranged either concentrically on the nipple 3 or in the coupling sleeve 6; wherein the electrical contact ring 31 is bound by two spaced apart axial end planes, wherein the electrical contact ring 31 contacts the mounting surface at least at both axial planes and wherein the electrical contact ring 31 is spaced apart from the mounting surface at least in an axial middle plane positioned between both axial end planes.

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 according to the invention with a hydraulic quick connector according to the preamble, which 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 on a cylindrical mounting surface, which cylindrical mounting surface is arranged either concentrically on the nipple or in the coupling sleeve, wherein the electrical contact ring is bound by two spaced apart axial end planes, wherein the electrical contact ring contacts the mounting surface at least at both axial planes and wherein the electrical contact ring is spaced apart from the mounting surface at least in an axial middle plane positioned between both axial end planes.
The electrical contact ring of the invention has a curved contact surface for the other part. When the ring is arranged on the nipple, the contact surface of the ring is shaped as the radially outer part of a torus while when the ring is arranged in the coupling sleeve, the ring is shaped as the radially inner part of a torus.
By having the electrical contact ring contacting the mounting surface at least at both axial planes and having the electrical contact ring spaced apart from the mounting surface at least in an axial middle plane, it is ensured that the nipple can be inserted and retracted from the coupling sleeve without the electrical contact ring blocking or limiting said movement.
Also the partial torus shape of the ring ensures that the ring can be compressed at least somewhat to ensure a contact force and accordingly good contact between both the nipple and the coupling sleeve.
In a preferred embodiment of the hydraulic quick connector according to the invention the body of the electrical contact ring extends between the two end planes and wherein the body is provided with slits extending in axial direction from either end plane and in circumferential direction alternatingly from one and the other end plane, such that the body has a meandering pattern.
Due to the slits providing a meandering pattern to the body the electrical contact ring is provided with an increased resiliency which enhances the contact between the nipple and the coupling sleeve.
In another embodiment of the hydraulic quick connector according to the invention the electrical contact ring comprises at least one lip extending in one of the end planes and into the mounting surface to secure the electrical contact ring in position.
In a further preferred embodiment of the hydraulic quick connector according to the invention the cylindrical mounting surface is provided by the bottom of a groove arranged either in the nipple or in the coupling sleeve.
A groove provides space for the electric contact ring and a groove is easily provided in a known nipple or coupling sleeve of a prior art hydraulic quick connector.
This allows for easy adaptation of a known quick connector to integrate the invention and have a reliable electric connection between the nipple and the coupling sleeve. The groove further ensures that the ring is not shifted from its position, as both edges of the ring will contact the mounting surface and will therefore be physically bound by the walls of the groove.
In still a further embodiment of the hydraulic quick connector according to the invention the electrical contact ring is of a beryllium copper alloy. Beryllium copper combines high strength with non-magnetic and non-sparking qualities. It has excellent metalworking, forming and machining properties. Therefore, it is very suitable for an electric contact ring for the invention.
Yet another preferred embodiment of the hydraulic quick connector according to the invention further comprises a seal arranged in the mounting sleeve, wherein the electric contact ring is mounted in the mounting sleeve at a position seen in insertion direction of the nipple beyond the seal.
Having the contact ring mounted at a position seen in insertion direction beyond the seal ensures that any scratches caused by the contact ring on the nipple outer surface will not influence the sealing surface and ensure a reliable sealing even after numerous disconnects and connects of the hydraulic quick connector.
Preferably, the nipple is provided near the insertion end with a first circumferential surface part having a reduced diameter and a second circumferential surface having a larger diameter with respect to the first circumferential surface part, wherein the seal abuts the second circumferential surface part when the nipple is inserted into the mounting sleeve.
The first surface part with reduced diameter allows for an easy insertion of the nipple and minimizes the chance that the leading edge of the nipple can damage the seal.
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.
Figure 2 shows a first embodiment of the invention.
Figure 3 shows a second embodiment of the invention.
Figures 4A and 4B show a cross section of respectively the first and second embodiment.
Figures 5A and 5B show a perspective view of the electric contact ring of respectively the first and second embodiment.
Figure 6 shows a perspective view with cut away portions of a third embodiment of the invention.
Figure 1 shows a perspective view of a prior art hydraulic guick 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 2 shows a first embodiment 20 according to the invention. This embodiment 20 corresponds largely with hydraulic guick connector 1, 2 shown in figure 1. An electric contact ring 21 is provided in a groove 22 on the insertion end 3 of the nipple 1. This electric contact ring 21 ensures contact between the nipple 1 and the coupling sleeve 2.
Figure 4A shows a cross section of the nipple insertion end 3 provided with the groove 22 and the electric contact ring 21. The bottom of the groove 22 provides a cylindrical mounting surface on which the electric contact ring 21 is arranged. The ring 22 is bound by two axial end planes 23, 24. The ring 22 contacts at said axial end planes 23, 24 the mounting surface, while in a middle plane 25 the ring 22 is spaced apart from the bottom of the groove 22.
As shown in figure 5A, the electric contact ring 21 is provided with slits 26, 27 extending respectively from the axial end plane 23 and the axial end plane 24, such that the body of the electric contact ring 21 has a meandering pattern. This meandering pattern provides additional resiliency such that when the nipple 1 is inserted into the coupling sleeve 2 the part of the ring 21 at the middle plane 25 is pressed against the inside of the coupling sleeve 2.
Figure 3 shows a second embodiment 30 according to the invention. In this second embodiment 30 an electrical contact ring 31 is arranged in a groove 32 in the coupling end 7 of the coupling sleeve 2.
Similar to the first embodiment 20 and shown in figure 4B, the electrical contact ring 31 is arranged on the mounting surface provided by the bottom of the groove 32. At the axial end planes 33, 34 the ring 31 is in contact with the bottom of the groove 32, while at a middle plane 35 the ring 31 is spaced apart from the bottom of the groove 32 to contact the nipple 1 when inserted into the coupling sleeve 2.
Figure 5B shows the electrical contact ring 31 in perspective view. Similar to the ring 21 shown in figure 5A, the ring 31 is provided with slits 36, 37 extending respectively from the axial end plane 33 and the axial end plane 34.
The electrical contact ring 31 is provided with lips
38, which extend into the bottom of the groove 32 to secure the ring 31 into position.
Figure 6 shows a perspective view with cut away portions of a third embodiment 40 of the invention. The hydraulic guick connector 40 is shown in connected position, wherein the nipple 41 is inserted into the coupling sleeve 42 in the direction F.
The coupling sleeve 42 is provided, when seen in insertion direction F first with a seal 43 and there beyond with an electric contact ring 44, similar to the embodiment shown in figures 5A and 5B.
The nipple 42 is provided with a first circumferential surface part 45 having a reduced diameter compared to the second circumferential surface part 46, which is used a sealing surface for the seal 43. As the first circumferential surface part 45 has a reduced diameter, this surface part is easily moved beyond the seal 43 without any dammage. And because the electric contact ring 44 is mounted in the coupling sleeve 41 beyond the seal 43, when seen in
on the second circumferential surface part 46 .

Claims (7)

Claims
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 on a cylindrical mounting surface, which cylindrical mounting surface is arranged either concentrically on the nipple or in the coupling sleeve, wherein the electrical contact ring is bound by two spaced apart axial end planes, wherein the electrical contact ring contacts the mounting surface at least at both axial planes and wherein the electrical contact ring is spaced apart from the mounting surface at least in an axial middle plane positioned between both axial end planes.
2. Hydraulic quick connector according to claim 1, wherein the body of the electrical contact ring extends between the two end planes and wherein the body is provided with slits extending in axial direction from either end plane and in circumferential direction alternatingly from one and the other end plane, such that the body has a meandering pattern .
3. Hydraulic quick connector according to claim 1 or
2, wherein the electrical contact ring comprises at least one lip extending in one of the end planes and into the mounting surface to secure the electrical contact ring in position.
4. Hydraulic quick connector according to any of the preceding claims, wherein the cylindrical mounting surface is provided by the bottom of a groove arranged either in the
nipple or in the coupling sleeve.
5. Hydraulic quick connector according to any of the preceding claims, wherein the electrical contact ring is of a beryllium copper alloy.
6. Hydraulic quick connector according to any of the preceding claims, further comprising a seal arranged in the
mounting sleeve, wherein the electric contact ring is mounted in the mounting sleeve at a position seen in insertion direction of the nipple beyond the seal.
7. Hydraulic quick connector according to claim 6, wherein the nipple is provided near the insertion end with a first circumferential surface part having a reduced diameter and a second circumferential surface having a larger diameter with respect to the first circumferential surface part, wherein the seal abuts the second circumferential surface part when the nipple is inserted into the mounting sleeve.
GB1716574.7A 2017-08-04 2017-10-10 Hydraulic quick connector Withdrawn GB2565161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/070353 WO2019025295A1 (en) 2017-08-04 2018-07-26 Hydraulic quick connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN201711027898 2017-08-04

Publications (2)

Publication Number Publication Date
GB201716574D0 GB201716574D0 (en) 2017-11-22
GB2565161A true GB2565161A (en) 2019-02-06

Family

ID=60326808

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1716574.7A Withdrawn GB2565161A (en) 2017-08-04 2017-10-10 Hydraulic quick connector

Country Status (2)

Country Link
GB (1) GB2565161A (en)
WO (1) WO2019025295A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1452390A (en) * 1974-02-05 1976-10-13 Laval Turbine Coupling for tubing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
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
DE50004601D1 (en) * 2000-02-03 2004-01-08 Daume Patentbesitzgmbh & Co Kg ELECTRICALLY CONDUCTIVE TUBE OR CABLE CLAMP

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1452390A (en) * 1974-02-05 1976-10-13 Laval Turbine Coupling for tubing

Also Published As

Publication number Publication date
GB201716574D0 (en) 2017-11-22
WO2019025295A1 (en) 2019-02-07

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Free format text: REGISTERED BETWEEN 20190411 AND 20190417

WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)