• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    11 ABSTRACT The invention re1ates to a hydraulic or pneumatic connector (100) cornprising a stern (5)and a sWiVe1nut (1). The connector (100) can be set in an engaging mode in Which aspring biased looking co11ar (2) is prevented from rotation re1atiVe the stem (5), While the sWiVe1 nut (1) is prevented from rotation re1atiVe the looking co11ar (2). Page11/11
    公开号:SE1550904A1
    申请号:SE1550904
    申请日:2015-06-29
    公开日:2016-12-30
    发明作者:Olav Haga Kenneth
    申请人:Kent Mill Innovations Ab；
    IPC主号:
    专利说明:

    A HYDRAULIC OR PNEUMATIC CONNECTOR HAVING A LOCKINGMECHANISM TECHNICAL FIELD The invention relates to a hydraulic or pneumatic connector comprising a hollow stemhaving a head and hose tail to which a hose can be secured, and a swivel nut mounted around the stem for connecting the head to a mating connector.
    BACKGROUND OF THE INVENTION Ever since high pressure hydraulic / Pneumatic assemblies were developed, there have been frequent accidents related to the partial or complete disconnection of the fittings.
    In the best case, a partial disconnection causes leakage of the fitting and leads todifferent levels of hydraulic fluid contamination/pollution/ fire hazard. In the worst casethe discharge of high pressure hydraulic fluid can cause severe injury or death topersonnel in the area. In addition, when unsecured hoses become disconnected, theyhave within them a large amount of stored energy and tend to flail about in a manner that has caused a significant number of fatal accidents.
    As these assemblies are used in a myriad of fluid power applications in differentindustries and countries, gathering data on the level of injuries / fatalities is difficult. Asan example, in 2011 the NSW Govemment in Australia undertook a review of “escapeof fluid” incidents, reportable under the NSW Coal Mine Health &Safety Regulation2006 (N SW Department of Industry & Investment, 2011). This review documented1,186 “escape of fluid” incidents reported between 2007 and 2010. In this 4 year period152 people were exposed to near misses or injury across 42 (of a total of 86) NSW Coal mines.Common causes of such partial or complete disconnection accidents relate: 0 Unsecured hoses, leading to unscrewing of fittings as a result of vibrations from cyclic loading.0 Poor installation practices leading to under or over tightening. 0 Relaxation of threads after loading.
    Page1/11 Previous related inventions include US Patent No: 4,643,459 which covers a quick fitcoupling, US Patent No: 4,5 83,769 for a locking assembly of a different design and USPatent Application No: 2010/0072, 745 for a device that prevents a hose or fitting fromdisengaging a locking fitting.
    DISCLOSURE OF THE INVENTION An object of the present invention is to provide a hydraulic or pneumatic connector which has a reduced risk of being unscrewed during operation.
    This object is at least to some extent solved by providing the hydraulic connectormentioned initially, wherein the stem comprises a mid-section between the head and thehose tail. A locking collar and a spring are mounted around the midsection, and theswivel nut is positioned between the head and the locking collar. The spring urges thelocking collar in a direction along the midsection towards the head, wherein the lockingcollar is conf1gured to be set in two modes: l) a non engaging mode at a pre-deterrnined distance from the head in whichthe locking collar being prevented from moving towards the head such that itdoes not pressingly engage the swivel nut, thereby allowing the swivel nut tofreely rotate relative the stem; and 2) an engaging mode in which the locking collar pressingly engaging the swivel nut and locking the swivel nut from rotation relative the stem.
    Preferably, in the engaging mode, the locking collar being movable along the mid-section while at the same time being prevented from rotation relative the mid-section.The locking collar being urged by the spring to pressingly engage the swivel nuttowards the head, in which engagement a locking structure of the locking collar beingconf1gured to interact with the swivel nut to prevent the swivel nut from rotationrelative the locking collar. Thereby the swivel nut is locked from rotation relative the stem.
    Preferably, the locking collar having a cut-out defined by inner walls. The inner shapeof the cut-out matches the outer shape of the midsection in such manner that the lockingcollar is prevented from rotation relative the mid-section when positioned between thepre-deterrnined distance and the head. At the same time the locking collar being movable along the midsection, from the pre-deterrnined distance to the head.
    Page2/11 Preferably, the inner shape of the cut-out is substantially identical to the outer shape of the midsection from the pre-deterrnined distance to the head.
    Preferably the lateral cross section of the midsection have a non-circular outer shapebetween the pre-deterrnined distance and the head. The terrn non-circular outer shapemeans shapes Where the distance to a central-axis is not the same for all points on theperiphery. Preferably, the outer shape of the cross-section is constant between the pre-deterrnined distance and the head, i.e. such that it does not change between the pre- deterrnined distance and the head.
    In one embodiment, the outer shape of the mid-section, between the pre-deterrnineddistance and the head, corresponds to a cross-sectional shape provided by cutting off one segment from a circle.
    Preferably, the outer shape of the midsection, between the pre-deterrnined distance andthe head, corresponds to a cross-sectional shape provided cutting off two opposing andparallel segments from a circle, thereby providing two flat opposing surfaces and twocurved opposing surfaces. However, many other forms of constant and non-circular outer shapes are of course conceivable.
    Preferably, the midsection has a reduced cross-section portion at the pre-deterrnineddistance, the reduced cross-section portion sufficiently reduced to allow the lockingcollar to be tumed relative the stem such that the cut-out of the locking collar can bemisaligned with the outer shape of the midsection, thereby providing the non-engagingmode at pre-deterrnined distance from the head in which the locking collar being prevented from moving towards the head.
    Preferably, the locking structure includes at least one proj ecting grip surface arranged tomate at least one flat of the swivel nut when the locking collar is set in the engagingmode, thereby preventing the swivel nut from rotation relative the locking co llar. Morepreferably, the locking means includes at least two projecting grip surfaces extendingparallel to each other and to the stem in the direction towards the head, the projectinggrip surfaces arranged to fit across two opposing flats of the swivel nut when thelocking collar is set in the engaging mode, thereby preventing the swivel nut fromrotation relative the locking collar. It should be noted that many other forms of locking means are conceivable.
    Page3/11 Preferably, the spring is provided between the locking collar and a washer contained onthe midsection by a retaining circlip secured in a groove at the end portion of themidsection facing the hose tail.
    The hydraulic connector can suitably be used in a hydraulic or pneumatic apparatus.Such apparatus can include at least one hydraulic/pneumatic motor, at least onehydraulic/pneumatic cylinder, at least one control valve, and at least one hose using the connector.
    BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a shows a hydraulic connector according to the in a locked engaging mode.
    Fig. 2 shows a shows a hydraulic connector according to the in an un-locked non-engaging mode.
    Fig 3A shows a 3D view of the stem section of the hydraulic connector.Fig. 3B shows a 2D view of the stem section of the hydraulic connector.Fig. 3C shows a cross-section of the midsection Fig 4 shows a locking collar of the hydraulic connector.
    DETAILED DESCRIPTIONFig 1 and 2 shows a hydraulic connector 100 comprising a swivel nut 1, a locking collar2, a helical compression spring 3, a washer 4, a hollow stem 5, and a retaining circlip 6.
    Fig. 1 & 2 demonstrate a locked engaging mode resp. an unlocked non-engaging mode.
    The hollow stem 5 is shown in more detail in Fig. 3A-3C. The stem 5 have a barbedhose tail 8 (the barbs only shown in Fig. 1 and 2) to which a hose can be attached, ahead 10 comprising a flange 11, and a midsection 12 between the head 10 and the tail.In the shown example the head 10 has a cone seat. A through-ho le 13 runs through thestem 5 starting at a free end of the hose tail 8 and ending in an opening at the head 10.The lateral cross-section of the midsection 12 having a constant outer shape along itsentire length apart from a machined groove 15 at an end portion of the midsection nearthe hose tail 8 and a reduced cross section portion 16 between the machined groove 15and the head 10 at a pre-deterrnined distance from the head 10. The outer shape of themidsection 12 corresponds to a shape cutting off two opposing and parallel segments from a circle, providing two flat opposing surfaces 18, and two curved opposing Page4/11 surfaces 19. The flat surfaces 18 between the groove 15 and the hose tail 8 enab1ing access for a wrench.
    Retuming to Fig. 1, the swive1nut 1 is brought along the stem 5. The swive1nut 1having an inner threaded section with an inner diameter 1arger than the outer diameter ofthe flange 11 and an inward proj ecting rim (not shown) with an inner diameter 1argeenough to a11ow free rotation around the midsection 12 but sma11er than the outerdiameter of the flange 11, such that when the nut 1 is screwed on to a mating threadedma1e connection (not shown) the inner inward proj ecting rim of the nut 1 wi11 pressing1yengage the flange 11 of the head 10 and thereby brining the head 10 into engagement with the mating connection (not show).
    The spring 3 is provided between the 1ocking co11ar 2 and the washer 4 that is securedby a retaining circ1ip 6 in the groove 15. The spring 3 urging the locking co11ar 2 in thedirection towards the head 10 of the stem 5. In the mode of Fig. 1 the spring 3 urges the locking co11ar 2 to engage the swive1 nut 1.
    The locking co11ar 2, shown in in more detai1 in Fig 4, comprises a flat body 20 having acut-out 25 defined by inner wa11s 21 providing an inner shape matching the outer shapeof the midsection 12. The locking co11ar 2 can be set in two modes, a non-engaging mode and an engaging mode.
    The non-engaging mode is provided at pre-deterrnined distance from the head 10. At thepre-deterrnined position the reduced cross-section portion 16 is suff1cient1y reduced toa11ow the 1ocking co11ar 2 to be tumed re1ative the stem 5. Thereby the cut-out 25 of thelocking co11ar 2 can be misa1igned with the outer shape of the midsection 12 to providethe non-engaging mode of the locking co11ar 2 in which the locking co11ar 2 is urgedtowards the head 10 by the spring 3 but prevented from s1iding towards the head 10 dueto the misa1ignment. When the locking co11ar 2 is set in the non-engaging mode, theswive1nut 1 is a11owed to free1y rotate re1ative the stem 5, a11owing it to be screwedonto a mating ma1e part. This non-engaging mode is shown in Fig. 2. From the non-engaging mode the locking co11ar 2 can be set in the engaging mode by rotating thelocking co11ar 2 re1ative to the stem 5 a1igning the cut-out 25 with the outer shape of the midsection 12.
    Page5/11 The engaging mode is set by aligning the cut-out 25 with the outer shape of themidsection 12, such that the locking collar 2 cab be moved along the mid-section 12towards the head 10. At the same time it is prevented from rotation relative the mid-section 12 since the cut out 25 matches the outer shape of the midsection 12. In thismode the locking collar 2 is urged by the spring 3 to engage the swivel nut 1. Lookingmeans, in the form of a pair of proj ecting grip surfaces 22 extends perpendicular fromthe flat body 20 at opposing sides thereof with the cut-out 25 centered in-between. Theprojecting grip surfaces 22 extending parallel to each other and to the stem 5 in thedirection towards the head 10. The proj ecting grip surfaces 22 arranged to fit across twoopposing flats of the swivel nut 1 when the locking collar is set in the engaging mode,thereby preventing the swivel nut 1 from rotation relative the locking collar 2. If thegrip surfaces 22 does not immediately fit across the flats of the nut 1, it is simple torotate the swivel nut 1 slightly until the locking collar 2 clicks into place and locks the nut 1 in place. This mode is shown in Fig. 1.
    A pair of opposite located grip wings 23 further extends from two opposing sides of theflat body 20, also with the cut-out 25 centered in-between. The grip wings 23 positioned90 degrees shifted relative the grip surfaces 22. The grip wings 23 enables a user topush the locking collar 2 from the engaging mode, of f1g 1, to the reduced cross-section portion 16 and tuming the locking collar 2, e. g. 90 degree, to the non-engaging mode ofFig.2.
    The hydraulic connector 100 is assembled by sliding the swivel nut 1 over the hose tail8 and the midsection 12 of the stem 5 until the inward proj ecting rim engages the flange11 of the head 10. Next the locking collar 2 is slid over the hose tail 8 of the stem 5 andlocating it beyond the reduced cross-section part 16 of the stem 5. Next the spring 3 isinstalled below the locking collar 2, followed by the washer 4 and the retaining circlip 6 that is secured at the groove 15.
    A hole may be provided in the locking collar 2 to allow tagging in circumstances suchas the use of soft seal connectors where the torque needs to be carefully controlled to avoid under or over tightening, which often leads to leaks.
    The whole stem 5 should ideally be manufactured from one piece of material. The stem 5 is designed with section sizes that allow it to be stronger than assemblies that are Page6/11 either side of it. Wherever there are reductions in the material cross-section, thetendency for stresses to be focussed at the corners of these changes in section have beenreduced in this design by the use of a radius at the bottom of these sections, e. g. in thereduced cross-section portion 16 in Fig. 3A-B. As this design uses cross-sections thatare significantly stronger than other parts of the connections, the choice of materialsfrom which it is manufactured can remain as it is for the connections on either end. Inthe final application the spring-loaded hydraulic connector is likely to have been supplied as a pre-assembled system.
    The invention can be used on flexible hoses and can be adapted for any type of hoseassemblies / combination of fittings i.e. Thread interface, O-ring, Matching angle, Metalto metal or Mated angle with O-ring. In the non-engaging mode (f1g. 2) the nut 1 of thescrew fitting is free to rotate such that it can be tightened to the correct torque. Asimple tum on of the flattened part of the stem 5 below the washer 4, causes the spring 3to activate the locking collar 2 and the nut 1 of the f1tting is effectively locked in place and cannot become unscrewed f1g. 1.
    Fig. 5 shows some examples of possible configurations a-e of non-circular outer shapes of the midsection 12.
    Fig. 6 shows an example where the the locking collar 102 have a cut-out 125 defined byinner walls 121. The inner shape of the cut-out 125 matches the outer shape of themidsection 112 in such manner that the locking collar 2 is prevented from rotationrelative the mid-section 112. However, as can be seen in this embodiment the innershape of the cut-out 125 is not identical to the outer shape of the midsection 112. In thisembodiment the midsection 112 have two protruding prof1les 130 that can match cut-out pockets 126. Hence, in this embodiment the locking collar is be aligned with the mid-section 112 every 90 degrees.
    Page7/11
    权利要求:
    Claims (5)
    [1] 1. ) a non engaging mode at a pre-deterrnined distanoe from the head (10) inwhioh the looking oollar (2) is prevented from moving towards the head (10)suoh that it does not pressingly engage the swivel nut (1), thereby allowingthe swivel nut to freely rotate relative the stem; and
    [2] 2. ) an engaging mode in whioh the looking oollar (2) pressingly engages the swivel nut (1) and looks the swivel nut from rotation relative the stem (5). . A oonneotor (100) aooording to olaim 1, wherein in the engaging mode, the looking oollar is movable along the mid-seotion (12) while at the same timebeing prevented from rotation relative the mid-seotion (12), in said mode thelooking oollar (2) being urged by the spring (
    [3] 3. ) to pressingly engage the swivelnut (1) towards the head (10), in whioh engagement a looking struoture (22) ofthe looking oollar (2) being oonf1gured to interaot with the swivel nut to preventthe swivel nut (1) from rotation relative the looking oollar (2), thereby looking the swivel nut (1) from rotation relative the stem (5). . A oonneotor (100) aooording to olaim 1 or 2, wherein the looking oollar having a out-out (25) defined by inner walls (21), the inner shape of the out-out (25)matohes the outer shape of the midseotion (12) in suoh manner that the lookingoollar (2) is prevented from rotation relative the mid-seotion (12) when positioned between the pre-deterrnined distanoe and the head (10). Page8/11 . A connector (100) according to claim 3, wherein the inner shape of the cut-out (25) is substantially identical to the outer shape of the midsection (12) from thepre-deterrnined distance to the head (10). . A connector (100) according to any one of the preceding claims, wherein the outer shape of the midsection (12), from the pre-deterrnined distance to the head (10), provide a lateral cross-section that is constant and non-circular. . A connector (100) according to any one of claims 3-5, wherein the outer shape of the mid-section between the pre-deterrnined distance and the head (10),corresponds to a cross-sectional shape provided by cutting off a segment from a circle. . A connector (100) according to any one of claim 3-5, wherein the outer shape of the midsection (12) between the pre-deterrnined distance and the head (10),corresponds to cross-sectional shape provided by cutting off two opposing andparallel segments from a circle, thereby providing two flat opposing surfaces (18) and two curved opposing surfaces (19). . A connector (100) according to any one of claim 3-7 wherein midsection (12) has a reduced cross-section portion (16) at the pre-deterrnined distance, thereduced cross-section portion (16) sufficiently reduced to allow the lockingcollar (2) to be tumed relative the stem (5) such that the cut-out (25) of thelocking collar can be misaligned with the outer shape of the midsection (12)between the pre-deterrnined distance and the head (10), thereby providing thenon-engaging mode at pre-deterrnined distance from the head (10) in which the locking collar (2) is prevented from moving towards the head (10). . A connector (100) according to any one of claim 1-8, wherein the locking structure (22) includes at least one proj ecting grip surface (22) arranged to mateat least one flat of the swivel nut (1) when the locking collar is set in theengaging mode, thereby preventing the swivel nut (1) from rotation relative the locking collar (2). Page9/11 5 10. 11. 12. A connector (100) according to any one of claim 1-9, Wherein the lockingstructure (22) includes at least two proj ecting grip surfaces (22) extendingparallel to each other and to the stem (5) in the direction towards the head (10),the projecting grip surfaces (22) arranged to fit across tWo opposing flats of thesWiVel nut (1) When the locking collar is set in the engaging mode, thereby preVenting the swivel nut (1) from rotation relative the locking collar (2). A connector (100) according to any one of claim 1-10, Wherein the spring (3)being provided between the locking collar (2) and a Washer (
    [4] 4. ) contained on themidsection by a retaining circlip (6) secured in a groove (1
    [5] 5. ) at the end portionof the midsection (12) facing the hose tail (8). A hydraulic or pneumatic apparatus including at least one hydraulic/pneumatic motor, at least one hydraulic/pneumatic cylinder, at least one control Valve, and at least one hose using the connector according to anyone of claims 1-11. Page10/11
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    同族专利:
    公开号 | 公开日
    EP3314153A1|2018-05-02|
    WO2017003362A1|2017-01-05|
    SE538910C2|2017-02-07|
    EP3314153A4|2019-01-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1691851A|1926-10-29|1928-11-13|George A Mccuean|Self-tightening pipe union|
    GB492340A|1936-03-26|1938-09-16|Rifat Avigdor|Locking device for preventing accidental loosening of separable screwed pipe joints|
    FR917287A|1945-07-09|1946-12-31|Safety brake for assembly of coaxial elements|
    US2728895A|1954-10-04|1955-12-27|Whitney Blake Co|Self-locking coupling device|
    US5188398A|1992-01-02|1993-02-23|General Electric Company|Redundantly locked fluid coupling|
    FR2710715B1|1993-09-29|1996-09-20|Marc Jean Pierre|Self-locking lock for pipes.|
    WO2013043367A1|2011-09-20|2013-03-28|Micro-Coax, Inc.|Locking connector|
    法律状态:
    2020-01-28| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1550904A|SE538910C2|2015-06-29|2015-06-29|A hydraulic or pneumatic connector having a locking mechanism|SE1550904A| SE538910C2|2015-06-29|2015-06-29|A hydraulic or pneumatic connector having a locking mechanism|
    PCT/SE2016/050661| WO2017003362A1|2015-06-29|2016-06-29|A hydraulic or pneumatic connector having a locking mechanism|
    EP16818345.7A| EP3314153A4|2015-06-29|2016-06-29|A hydraulic or pneumatic connector having a locking mechanism|
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