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  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    19 21 ABSTRACT The present invention relates to a iockabie friction joint (1), in particular for adjustmehts ofreiative oivotai positioning of pioe sections (3) of a pipe system (5) on which the frictionjoint (1) is mounted, the friction joint (1) comprising; a first joint member (11) with a firstarm member (13), a second joint member (15) with a second arm member (17), the firstand second joint members (11, 15) each having an inner friction surface (29) and pivotalconnecting projections (41) respectively, a friction adjustment device comprising anadjustment element (21) situated on an outer surface (23) of the second joint member (15),and a fixating element (35) for fixating the position of the adjustment device relativa to thefriction joint (1), situated on an outer surface (25) of the first joint member (11), a pluraiityof friction discs (27) being situated adjacent each other and between the inner frictionsurfaces (29) of the joint members (11, 15), wherein the friction between the friction discs(22) can be adjusted by means of the adjustment element (21). Each friction disc (27) haveat least one friction surface (31) acting on an adjacent friction surface (29, 31) of anotherelement of the friction joint (1) and that each friction disc (27) is pivotaiiy coupied to at least one other element of the friction joint (1). Figure for publication: 2
    公开号:SE1650232A1
    申请号:SE1650232
    申请日:2016-02-23
    公开日:2017-08-24
    发明作者:Stenberg Gustav
    申请人:Fumex Ab；
    IPC主号:
    专利说明:

    lf) 2G LÛCKABLE FRlCTlGN JOlNT TECl-lNlCAl. FlELl)The present invention reiates to a lockable friction joint, in particular configured foradjustrnents of a desired pivoted position between two pipe or tube sections of for example a gas evacuation system or a localized ventilation system.
    TECHNECAL BACKGROUND ln industrial or laboratorv environments an appropriate air exchange and/orventilation is of utmost importance for environmental and processing reasons.Processes which generates fumes or gases which may cause health issues orinterfere with the process at hand must in such environments be handled withproper care to ensure that said fumes or gases are disposed of in an efficientmanner. in some processes, such as weldlng, curing of particular resins, handling ofchemical reactions or similar there can he a special need to efficiently dispose ofsaid gasses or fumes at a specific local area. in such cases an adjustable localizedventilation system is often used. Such a device can be adjusted in such a way thatthe gas extraction unit of the device can be placed at a specific desired position andthus he close to where the gases or fumes is or will be generated, Preferably such adevice should be easy to lock in place but also be easy to unlock so that the devicecan he re-adjusted to another position and then yet again be iocked into its newposition. These adjustments must also be reliable over time to ensure a safe and healthy work environment.
    SE 529 141 CZ discloses such an adjustable localized ventilation system. The systemcornprises a plurality of pipe sections coupied with flexibla tube sections in betweensaid pipe sections, providing a piping system which can be adjusted by means of the flexlhle tube sections to place a gas extraction unit of the system at a desired position. The gas extraction can be moved between different positions, and also belocked in place when in a desired position. To achieve this, the system is providedwith lockable friction joints at the sides of the flexible tubes, wherein an adjustmentknob of an adjustment device can be turned to tighten or loosen a locking systemcomprising friction discs and rings, to increase or decrease the friction between saiddiscs and rings. When the friction is lowered between the adjacent friction surfacesof the device, the pipe sections may be pivoted in relation to each other. And incontrary, when the friction is increased to a high enough level by means of theadjustment knob, the friction joint is locked in place so that the pipe sectionsremain rigid in relation to each other and the gas extraction unit is locked in the desired position.
    There are however drawbacks with the device ofSE 529 141 (22. The shape of thefriction discs and rings and the way these components are designed to fit togethercan cause wear issues during the life span of the joint. The friction disc situated inthe middle of the assembly is held in place by the two adjacent discs by means of acircumferential protruding edge on each outer disc, extending inwards towards theother discs. This can cause issues if the middle friction disc is worn out, as the edgesthen will hinder the friction surfaces to interact properly with each other.Furthermore, as the screw holding the adjustment device together is pivotallyfixedly connected to the joint arm opposite to the adjustment knob, applied forcesto the joint arm supporting the screw may affect the interlocking friction forces asthe locking mechanic provided by the applied torque may be affected. Even further,as the elements for pivoting the respective friction disc of each joint arm alsofunction as projections for limiting a potential overturning of the joint, the pivotingof the friction discs due to pivoting of the joint arms may be affected if a user exertstoo much force on these elements due to trying to pivot the arms more than intended.
    There is thus a need for an improved iockabie friction joint for interiocking pipesections in regards to each other, for such devices as adjustabie iocaiized ventiiation systems, which eiiminates the above mentioned drawbacks with prior art.
    SUMMARY GF iNVENTEON The object of the present invention is to provide a iockabie friction joint for pipesystems which overcomes the dravvbacks of prior art. iviore specificaiiy the object ofthe invention is to provide a friction joint for reiiabie adjustments and iocking ofreiative pivotai positioning of pioe sections of a pipe system on which the friction joint is mounted.
    This object is achieved by the features ofthe characterising portion of ciaim 1.Further advantages of the invention are described with reference to the dependent ciaims.
    According to a first aspect of the invention, discioses a iockabie friction joint, inparticuiar for adjustments of reiative pivotai positioning of pipa sections of a pipesystem on which the friction joint is mounted. The friction joint comprises a firstjoint member with a first arm member and a second joint member with a secondarm member, the first and second joint members each having an inner frictionsurface and pivotai connecting projections respectiveiy. The friction joint furthercombrises a friction adjustment device comprising an adjustrnent eiement situatedon an outer surface of the second joint member, and a fixating eiement for fixatingthe position of the adjustment device reiative to the friction joint, situated on anouter surface of the first joint member. Even further the friction joint comprises apiuraiity of friction discs being situated adjacent each other and between the innerfriction surfaces of the joint members, vvherein the friction between the frictiondiscs can be adjusted by means of the adjustment eiement. The iockabie frictionjoint is characterised in that each friction disc have at ieast one friction surface acting on an adjacent friction surface of another eiement of the friction joint and if) that each friction disc is pivotaiiy coupied to at ieast one other eiernent of the friction joint..
    This has the advantage that a fiexihie and easy to use friction joint is provided for apiping system where adjustment of the positions of the pipe sections of the pipesystem is needed. The friction acting between the friction surfaces of the frictiondiscs can then he adjusted hy means of the adjusting eiernent to change the statusof the interiocking friction forces in the friction joint. This has the effect that thereiative pivoting of the pipe sections of the pipe system can he changed betweeneasiiy moved, moved hut with resistance or rigidiy iocked hy means of increasing ordecreasing the friction forces with the adjustment element. This friction discshaving friction surfaces acting on adjacent eiernents and heing pivotaiiy coupied toat ieast one other eiement of the friction joint has the advantage that iess forceneeds to be appiied to increase the frictionai forces between the friction surfaces ofthe discs, as aii friction discs of the friction joint are activeiy acting in hothestahiishing frictionai contact when needed hut aiso being pivotaiiy heid in piace inregards to the respective ingoing eiements of the friction joint. it is further aiso anadvantage in that the discs are secureiy heid in piace in a simpie way when then thefriction forces in the friction joint are iowered. This is advantageous as it provides astabie and reiiahie device where high frictionai forces are easiiy appiied to thefriction discs hy a user, and where there is iess risk of parts moving or heing un-aiigned in respect each other when the friction forces are iowered which can he iead to potentiai rnaifunction and/or faiiure of the friction joint.
    According to another aspect of the invention the outer surface of the first jointmember further comprises an outer friction surface and the fixating eiementfurther comprises a friction surface facing towards the outer friction surface of the first joint memher. it) 2G 3D This has the advantage that fixatlng element can be used for multiple functions inthe friction joint, which is heneflcial as it can lower the manufacturing costs due toless pieces being used, and at the same time in a simple way provide increased frictlonal contact surfaces in the friction joint.
    According to yet another aspect of the inventlon the flxating element is pivotaliy coupled to the pivotal connecting projections of the second joint member.
    This has the advantage that the adjustment element of the adjustment devicecannot be pivoted if the first arm member is being pivoted and/or exerted a forceupon. This is beneficial as the frictlonal forces remain constant when arm membersare being pivoted in relation to each other during an adjustment procedure, which provides a reliable and safe to use frlction joint.
    According to a further aspect of the invention the fixating element furthercomprises a circurnferentlal projection, and the outer surface of the first jointmember further comprlses an outer projection, wherein the circumferentialprojection and the outer projection are configured to interact and thereby limit the pivotal movement of the joint members relative to each other.
    This has the advantage that the pivotai movement of the frlctlon joint arms inrelation to each other are limited in a simple and efficient way. This configuration isalso beneflcial in that the pivotal iimitation is easily seen by a user adjusting thepipe system and therefore lessens the risk of overturning the joint which potentlaliycould cause mechanical failure in the device. Another advantage is that the llmitlngmechanic of the device does not interfere with the more delicate interior parts ofthe frlctlon joint which also can he a source of mechanical failure for the joint. Evenfurther this has the advantage that the pivotal movement of the plpe sections of apipe system ls guided to be distributed over the separate sections and bends of the system. This is due to the fact that two adjacent pipe sections cannot be pivotecl to be paraiiei to each other. i-ience, if a user performing a pivoting movement of thesystem passes the iimit of movement for one joint, the additionai movementneeded wiii automaticaiiy be transiated to other parts of the system providing an easy to use system with Smooth pivotai movements.
    According to another aspect of the invention each friction disc has a through hoie inthe rniddie of the disc, configured to aiiow passage of movabie eiements through said hoie.
    This has the advantage that the friction discs provide frictionai surfaces whiie at thesame time aiiow for moving parts of the friction joint and/or fiuids to pass throughsaid hoies if desired which is beneficiai as the friction joint provided is customizabie in a wide variety of ways.
    According to yet another aspect of the invention the pivotai connecting projectionsof the first joint member are arranged in a ring formation outside of a diameter ofthe intermediate friction discs and protruding towards the second joint member,and the pivotai connecting projections of the second joint member are arranged ina ring formation inside of a diameter of the through hoie of the intermediate friction discs and protruding towards the first joint member.
    This has the advantage that the pivotai connecting projections of the respectivejoint member provide an eveniy distributed pivotaiiy support for interactingeiements of the friction joint vvherein the pivotai connecting projections of therespective joint members cannot coiiide with each other as they are separated by the friction discs.
    According to a further aspect of the invention every other friction disc has radiaiiy spaced outer iocking projections configured to interiock with the pivotai connecting “iQ 2G projections of the first joint member, and every other friction disc has radiaiiyspaced inner iocking projections configured to interiock with the pivotai connecting projectiohs of the second joint member.
    This has the advantage that each friction disc is pivotaiiy heid in piace in regards tothe first or the second joint member which provides a stabie and reiiahie frictionjoint with iess parts which are abie to move freeiy when the frictionai forces areiowered. This further has the advantage that the frictionai forces are eveniy spreadout on the active frictionai surfaces when appiied by the adjustment eiement, whiieensuring that each friction disc provides frictionai force counteracting unwantedpivoting of the joint members without any of the discs acting as a siiding piane towards an adjacent eiement of the friction joint.
    According to an even further aspect of the invehtion the number of intermediate friction discs is at ieast three.
    This has the advantage that the totai area of the combined frictionai surfaces isincreased in a sirnpie way. This further bas the advantage that the materiaiseiection for the discs aiiows for more freedom as the middie disc can be seiectedfor optimai frictionai performance without the need to care for direct surface interaction with the joint members of the friction joint.
    According to another aspect of the invention the friction joint is mounted on the exterior of the pipe sections of the pipe system on which it is mounted.
    This has the advantage that the friction joint may be appiied to a wide variety ofpipe systems or the iike, and can be customized without the need to re-design oraiter a pre-existing pipe system upon which it is being mounted. This further has the advantage that a singie friction joint can be mounted on one side respective pipe 2G section of a pipe system or if needed, two opposite friction joints can he mounted on opposite sides of said pipe sections if more frictionai resistance is needed.
    According to yet another aspect of the invention the friction joint is integrated in a piping system, wherein the arm members are pipes of the pipe system.
    This has the advantage that an integrated friction iockahie pipe system is providedwhich can he heneficiai where space is iimited. This is aiso advantageous for srnaiierpipe systems where iess weight needs to he prevented from moving hy the frictionai forces in the friction joint.
    BRiEF DESCRiPTEÛN OF THE FiGURES The present invention wiii now he described in detaii with reference to the figures, wherein: Figure 1 shows a side view of an exampie of an adjustahie iocaiized gasextraction device with a iockahie friction joint mounted thereupon.
    Figure 2 shows an expioded view of an adjustahie friction joint according to thepresent invention.
    Figure 3 shows another expioded view of an adjustahie friction joint according to the present invention.
    DETAiLED DESCRiPTiONS OF THE iNVENTEON iiereinafter different emhodirnents of the invention wiii he described associatedwith the enciosed drawings. Reference numbers are not to he viewed as restrictivein reiation to the scope of the protection given hy the patent ciairns, oniy asassistance in understanding the drawings and the various technicai features of the invention. 25) As wiii be reaiized the invention can be modified in various ways without deviatingfrom the scope of the ciaims, and specific features and aspects iiiustrated in thedrawings of the different exampies and embodiments may be used individuaiiy, orbe combined, to achieve a variety of combined technicai features and embodimentsof the invention. HenCe, the drawings and the description thereto shouid be viewed as iiiustrative and not restrictive.
    Figure 1 shows a side view of an adjustabie iocaiized gas extraction device uponwhich a iockabie friction joint 1 according to the present invention is mounted. Theiockabie friction 1 joint is mounted on the iocaiized gas extraction device to aiiowadjustments of reiative pivotai positioning of pipe sections 3 of a pipe system 5 onwhich the friction joint 1 is mounted, the pipe system 5 being the pipes used forguiding the fiow of air, gases or fumes being extracted with the iocaiized gasextraction device. The pipe system comprises rigid pipe sections 3 coupied to eachother by means of fiexibie tube sections 7 which aiiows for pivotai movement of thepipe sections 3 in regards to each other. This in turn aiiows for spatiai positioning ofa funnei or the iike of the gas extraction device so that intake port 9 of theextraction device can be piaced as ciose as possibie to where the air, gases or fumesare to be evacuated. To be abie to adjust said positioning, and aiso iock it in piacewhen the desired positioning is achieved, the pipe systems 5 of such devices needto be provided with means to switch between a iocked state and a movabie state ofthe pipe sections 3 by a user positioning the extraction unit where it is desired. Theexampie depicted in figure 1 show a friction joint 1 according to the presentinvention mounted on the outside of the end sections of the pipe sections 3 andextending paraiiei to the fiexibie tube sections 7 bridging the separate pipe section 3.
    The friction joint 1 comprises a first joint member 11 with a first arm member 13 and a second joint member 15 with a second arm member 17, vvherein the arm 3G members 13, 17 are connected to each other by the joint members 11, 15. Said armmembers 13, 17 are abie to pivot about a common axis 1% going through the firstand second joint members 11, 15. Each first and second joint member 11, 15further comprise an inner friction surface and pivotai connecting projections respectiveiy (not shown in figure 1).
    The friction joint 1 further comprise a friction adjustment device comprising anadjustment eiement 21 situated on an outer surface 23 of the second joint member15, and a fixating eiement (not shown in figure 1) for fixating the position of theadjustment device reiative to the friction joint 1, situated on an outer surface 25 ofthe first joint member 11. The adjustment eiement 21 in this exampie is a rotatabieknob which provides a user with means for adjusting the frictionai forces in thefriction joint 1 by turning said knob. The adjustment eiement 21 may be anothertype of adjustment eiement known in the art such as a iever or the iike. Theadjustment eiement 21 is connected to the fixating eiement situated on theopposite side of the friction joint 1 by means of, for exampie, a threaded pin orscrew 22 (seen in figure 2 and figure 3). This aiiows a user to turn the adjustmenteiement 21 to adjust the pressure exerted on the friction joint 1 by the fixatingeiement. The more the fixating eiement and the adjustment eiement 21 arebrought together by means of the threaded pin or screw, the more theintermediate eiements of the friction joint 1 are compressed. Thus, if a high enoughtorque is appiied to the adjustment eiement 21, the frictionai forces acting betweenthe intermediate eiernents of the friction joint 1, as a resuit of the compression,iocks the joint in piace preventing pivotai movement of the pipe sections 3 corresponding to said joint.
    The friction joint 1 according to the present invention further comprises a piuraiityof friction discs 27 being situated adjacent each other and between inner frictionsurfaces 29 of the joint members, for a detaiied view of said friction discs 27 and inner friction surfaces 29, see figure 2 and figure 3. The frictions discs are provided if) 11 between the joint members 11, 15 of the friction joint 1. When the adjustmenteiement 21 is used to increase or decrease the appiied compressing force betweenthe each eiement of a joint 1, said friction discs 27 are thus being pressed againsteach other due to said compression. i-ience, the friction between the friction discs 27 can be adjusted by means of the adjustment eiement 21.
    When no or a smaii amount of frictionai force is appiied to the friction discs of thejoint 1, the arm members 13, 17 of the friction joint 1 are abie to be pivoted reiativeto each other, either freeiy or with a resistance corresponding to the amount offorce applied. As the weight of the pipe sections 3 and/or the pipe system 5 in itsentirety may vary depending on the assembiy at hand, the amount of frictionaiforce needed to support the weight of the pipe sections 3 or system 5 varyaccordingiy. When the amount of frictionai force reaches a iimit where the frictionaiforces overcome the forces of gravity acting on the system 5, the friction joint 1 andthereby the pipe system 5 is iocked in piace. The pipe system 5 may aiso beprovided with dampers or and/or other guiding eiements which may affect themovement of the pipes sections 3. i-ience, forces acting on the pipe system 5 due tohydrauiic dampers and the iike can aiso be counteracted by means of the friction joint 1 according to the present invention.
    According to the invention, each friction disc 27 of the friction joint 1 comprises atieast one friction surface 31 acting on an adjacent surface of another adjacenteiement of the friction joint 1. Said another eiement may be another friction disc 27or one of the first or second joint members 11, 15 of the friction joint 1. Further,each friction disc 27 is pivotaiiy coupied to at ieast one other eiement of the frictionjoint 1. This ensures the each disc 27 is activeiy counteracting a rotationaimovement in the joint 1 caused by the weight ofthe pipe section 3 and system 5.Each disc 27 counteract said rotationai movement by means of frictionai forcesacting on adjacent surfaces and by means of means of being pivotaiiy coupied to at ieast one other eiement of the joint 1. As none of the discs 27 is counteracting a if) 3D 12 rotationai movement soieiy hy means of frictionai force, no disc 27 is beingsubjected to rotationai frictionai force in more than rotationai direction at a timewithout being rotationaiiy heid in piace in regards to at ieast one other eiementtaking part in the rotation. Hence, no friction disc 27 in the friction joint l issubjected to torque directed ciockwise on one side whiie being suhjected to atorque directed counter-ciockwise on the other side. Such a disc 27 needs to have ahigher amount of compressing force appiied to avoid pivoting of the arm members13, 17. By having a piuraiity of friction discs 27 share the frictionai forces due tocompression, where each disc 27 aiso is pivotaiiy coupied to another eiementwherein one of said other eiement is one of the first and second joint members 11,15, iess compressing force needs to be appiied to the assembiy by means of theadjustment eiement 21 to iock the friction joint 1 in piace. if a friction disc 27 isbeing subjected to opposite torsionai forces on opposite sides, the disc wiii aiso besubjected to higher sheer and torque which may deform the disc and affect themechanicai properties of said disc. if said acting forces are high enough the disc mayhe mechanicaiiy deformed iowering the thickness of the disc which in turn wouidiower the cornpressing forces hoiding the discs together. Such a situation is thereby eiiminated with a friction joint 1 according to the present invention.
    Figure 2 shows an expioded view of an adjustabie friction joint 1 according to anexempiary embociiment of the present invention. The friction joint 1 in thisembodiment comprises a first joint member 11 having a first arm member 13 and asecond joint member 15 having a second arm member 17. This exampie of thedisciosed invention further comprises three intermediate friction discs 27 situatedbetween the first and second joint members 11, 15. in this exampie aii threeintermediate friction discs 27 comprises a through hoie 33 in the middie of eachdisc 27, which hoies 33 are configured to aiiow passage of movabie eiementsthrough said hoies 33. The friction discs 27 may be made of metai, a poiymericmateriai, a cerarnic materiai or a composite materiai. The friction of the friction surfaces 31 of the discs 27 may stem from the materia! properties of the ingoing SQ 13 materials, or be due to surface treatment of said surfaces 31. Even further thefriction joint 1 comprises a friction adjustment device comprising an adjustment eiement 21 and a fixating eiement 35.
    The adjustment eiement 21 and the fixating eiement 35 are coupied to each otherthrough the friction joint 1 by means of a threaded pin or screw 22 extendingthrough a common axis 13 of rotation for the oivotai movement of the respectivearm members 13, 17 of the friction joint 1. The first and second joint members 11,15 and the intermediate friction discs 27 situated between said joint members 11,15 may thereby be compressed by means of rotation of the adjustment eiement 21,which rotation pushes the adjustment eiement 21 and the fixating eiement 35 towards each other.
    As exempiified in figure 2, the outer surface 25 of the first joint member 11 mayfurther cornprise an outer friction surface 37 and the fixating eiement 35 mayfurther comprise a friction surface 39 facing towards the outer friction surface 37 ofthe first joint member 11. This increases the totai amount of active frictionaisurfaces in the friction joint 1 without needing to provide additionai intermediatefriction discs 27 in the friction joint 1. As the amount of friction surfaces andthereby the totai frictionai surface area is increased, jess force needs to be appiiedby a user by means of the friction adjustment device to ensure that the friction joint 1 is iocked in terms of pivotai movement. in the exampie of figure 2 the inner friction surface 29 and pivotai connectingprojections 41 of the second joint member 17 are seen. The inner friction surface 29provides frictionai resistance towards a rotationai movement of the adjacentfriction disc 27 when the friction joint 1 is assembied. As is further seen in figure 2,the pivotai connecting projections 41 of the second joint member 15 are arrangedin a ring formation inside of a diameter Di of the through hoie 33 of the intermediate friction discs 27 and protruding towards the first joint member 11. 3G 14 The pivotai connecting projections 41 of the friction joint extend through thethrough hoie 33 of the intermediate friction discs 27 and through a hoie in the firstjoint member and are then coupied to the fixating eiement 35 by means of recesses43 configured for engaging said connecting projections 41. The fixating eiement 35is hence pivotaiiy coupied to the pivotai connecting projections 41 of the secondjoint member 15. This means the fixating eiement 35 wiii be rotationaiiy iocked inregards to the second joint member 15. As the fixating eiement 35 is rotationaiiyiocked reiative the second joint member 15, any pivotai forces from the first armmember 13 generating rotationai forces of the first joint member 11, acting on theadjacent fixating eiement 25, vviii not cause a rotationai dispiacement of the fixatingeiement 25 in reiation to the second joint member 15. This in turn means that theadjustment eiement 21, arranged adjacent the second joint member 15, wiii neverbe affected by a pivotai movement ofthe respective arm members 13, 17. Thisensures that any pivotai adjustments of the arm members 13, 17 in reiation to eachother whiie the friction joint 1 is not iocked vviii not directiy affect the frictionaiforces of the friction discs 27 by means of invoiuntary rotation of the adjustment eiement 21.
    The fixating eiement 35 may further comprise a circumferentiai projection 45, andthe outer surface 25 of the first joint 11 member may comprise an outer projection47, wherein the circumferentiai projection 45 and the outer projection 47 areconfigured to interact and thereby iimit the pivotai movement of the joint members11, 15 reiative to each other. The circumferentiai orojection 45 of the fixatingeiement 35 further comprises a first end 49 and a second end 51. The outerprojection 47 of the first joint member 11 correspondingiy further cornprises a firstedge 53 and a second edge 55. When the first and second arm members 13, 17 ofthe friction joint 1 are being pivoted reiative each other the outer projection 47 ofthe first joint member 11 wiii then rotate about the axis of said pivotai movement.
    When the rotation of the outer orojection 47 in a ciocitwise direction reaches a 1G 2G 3G predetermined iimit, the first end 49 of the circumferentiai projection 45 abutsagainst the first edge 53 of the outer projection 47 which prevents furthermovement is said direction. Correspondingiy when rotation of the outer projection47 in a counter-ciockwise direction reaches a predetermined iimit the second end51 of the circurnferentiai projection 51 abuts against the second edge 55 of theouter projection 47 which prevents further movement is that rotationai direction.This provides a simpie and efficient mechanic to iimit the pivotai movement of thefriction joint 1 which can act as a safeguard for the fiexibie tube sections of a pipesystem 5 on which the friction joint 1 is mounted. The interaction ofthecircumferentiai projection 45 and the outer projection 47 aiso acts as guiding meansfor the pivotai movement of the system as a whoie, as movement of one frictionjoint 1 transiates to another friction joint in the system if said circumferentiaiprojection 45 and the outer projection 47 abuts against each other and iimits the pivoting of the first friction joint 1.
    The pivotai connecting projections 41 of the second joint 15 member and therecesses 43 of the fixating eiement 35 may further be configured to prevent amisaiignment of these two eiements 15, 35 in regards to each other. One specificprojection 41' and a corresponding recess 43' may have a modified shape so thatthe fixating eiement 35 oniy can be mounted in one specific angie. This provides a reiiahie friction joint 1 for which an incorrect assembiy is impossible.
    Looking at figure 3, the same exempiary embodiment expioded view of anadjustabie friction joint 1 of the present invention is shown but from another pointof view. From this angie the piacement of the pivotai connecting projections 41 ofthe first joint member 11 are seen. Said pivotai connecting projections 41 of thefirst joint 11 member are arranged in a ring formation outside of a diameter DZ ofthe intermediate friction discs 27 and protruding towards the second joint member 15. ”iÛ 2G 16 Looking at both figure 2 and 3 it is seen that every other friction disc 27 has radiaiiyspaced outer iocking projections 57 configured to interiock with the pivotaiconnecting projections 41 of the first joint member 11, and every other friction disc27 has radiaiiy spaced inner iocking projections 59 configured to interiock with thepivotai connecting projections 41 of the second joint member 15. Further, as ispreviousiy disciosed, the pivotai connecting projections 41 of the first joint member11 are arranged in a ring formation outside of a diameter D2 of the intermediatefriction discs 27 and protruding towards the second joint member 13, and thepivotai connecting projections 41 of the second joint member 13 are arranged in aring formation inside of a diameter Di of the through hoie 33 of the intermediatefriction discs 27 and protruding towards the first joint member 11, This provides anarrangement where every other intermediate friction disc 27 disposed between thefirst and second joint members 11, 15 are rotationaiiy iocked reiativeiy the first orthe second joint members 11, 15. When force is apoiied by compressing theassembiy of friction discs 27 and joint members 11, 15 by means of the adjustmenteiement 21 and a oivoting force is exerted on the joint arms 13, 17, each frictiondisc 27 wifi then effectiveiy counteract pivoting of the arms 13, 17. Due to thepiuraiity of the friction discs 27 giving rise to a high combined frictionai surface areaand their aiternating rotationai directions and being rotationaiiy iocked toaiternating joint members, high forces counteracting pivoting movement of the joint are obtained by means of the adjustment eiement 21 and the friction discs 27.
    The configuration of the friction discs 27 according to the invention further aiiowsfor providing more discs to further increase the combined frictionai surface areavvhiie stiii maintaining the stabiiity of the friction joint 1. To aiiow for a iargernumber of friction discs 27, the pivotai connecting projections 41 of the jointmembers 11, 13 can be made ionger. The friction discs 27 may aiso individuaiiy bemade thinner so that the thickness of the stack of discs remains the same. in such acase no other aiterations to the friction joint 1 needs to be done. As both the first and the second joint members 11, 15 are provided with inner friction surfaces 29 1G 17 the number of discs 27 is interchangeabie without modifying the joint members 11,15. The number of, and individuai piacement of the ingoing friction discs 27 arehence easiiy customizabie as the design of the friction joint 1 according to thepresent invention remains functionai in regards of abutting friction surfaces 29, 31and piyotai connecting eiements 41 interiocking with corresponding discs 27 regardiess of the totai number of friction discs 27.
    According to the exempiary embodiment described accompanying figure 2 and 3,the friction joint is configured to be mounted on the exterior of the pipe sections 3of the pipe system 5 on which it is mounted. Üepending on the size and weight ofthe pipe system 5 one singie friction joint may be used at each bend in the pipesystem 5, or two opposite friction joints 1 can be mounted on opposite sides ateach bend. A pipe system 5 of iarger size and weight might need the support of twofriction joints 1 at each bend whiie a smaiier pipe system 5 might be heid up with just one friction joint 1, According to another ernbodiment of the friction joint 1 the joint members 11, 15may be in the shape of truncated cones and be coupied to arm members 13, 17formed as pipe sections 3. This aiiows for a pipe system 5, where the friotion joint 1is integrated in the pipe system 5, wherein the arm members are pipes of the pipesystem 5. in this aiternate embodiment the fiow of air, fumes or gas fiows through the through hoie 33 of the friction discs 27.
    As shouid be obvious for a person skiiied in the art, the different exampies of thefriction joint and its individuai parts described herein can be combined in variousways without deviating from the inventive concept or the scope ofthe protection set up by the enciosed patent ciaims.
    权利要求:
    Claims (9)
    [1] 1. 8 CLAih/(S Lockabie friction joint (1), in particular for adjustments of reiative pivotaioositioning of pipe sections (3) of a pipe system (5) on which the frictlen joint (1) ismounted, the friction joint (1) cornprising; a first joint member (11) with a first armmember (13), a second joint member (15) with a second arm member (17), the firstand second joint members (11, 15) each having an inner friction surface (29) andpivotai connecting projections (41) respectiveiy, a friction adjustment devicecomprising an adjustment eiement (21) situated on an outer surface (23) of thesecond joint member (15), and a fixating eiement (35) for fixating the position ofthe adjustment device relative to the friction joint (Ii), situated on an outer surface(25) of the first joint member (11), a piuraiity of friction discs (27) being situatedadjacent each other and between the inner friction surfaces (29) of the jointmembers (11, 15), wherein the friction between the friction discs (27) can beadjusted by means of the adjustment element (21), characterised in that each friction disc (27) have at ieast one friction surface (31)acting on an adjacent friction surface (29, 31) of another eiement of the frictionjoint (1) and that each friction disc (27) is oivotaiiy coupied to at least one other eiement of the friction joint (1). Lockabie friction joint (1) according to ciaim 1, wherein the outer surface (25) of thefirst joint member (11) further comprises an outer friction surface (37) and thefixating element (35) further comprises a friction surface (39) facing towards the outer friction surface (37) of the first joint member (11), Lockabie friction joint (1) according to any of the proceeding claims, wherein thefixating element (35) is pivotaily coupied to the pivotal connecting projections (41) of the second joint member (15). Lockabie friction joint (1) according to any of the proceeding ciaims, wherein thefixating eiernent (35) further comprises a circumferentiai projection (45), and the outer surface (25) of the first joint member (11) further comprises an outer 1G 2G 3G 10. 19 projection (47), wherein the circumferentiai projection (45) and the outerprojection (47) are configured to interact and therehy iimit the pivotal movement of the joint members (11, 15) reiative to each other. tockahie friction joint (1) according to any of the proceeding ciaims, wherein eachfriction disc (27) has a through hoie (33) in the middle of the disc (27), configured to aiiow passage of movahle elements through said hoie (33). Lockahie friction joint (1) according to claim 5, vvherein the pivotai connectingprojections (41) of the first joint member (11) are arranged in a ring formationoutside of a diameter (DZ) of the intermediate friction discs (27) and protrudingtowards the second joint member (15), and the pivotai connecting projections (41)of the second joint member (15) are arranged in a ring formation inside of adiameter (D1) ofthe through hole (33) of the intermediate friction discs (27) and protruding towards the first joint member (11). Lockabie friction joint (1) according to ciaim 6, wherein every other friction disc (27)has radiaiiy spaced outer iocking projections (57) configured to interiock with theoivotai connecting projections (41) of the first joint member (11), and every otherfriction disc (27) has radiaiiy spaced inner iocking projections (59) configured tointeriock with the pivotai connecting projections (41) of the second joint member (15). Lockahie friction joint (1) according to any of the proceeding ciaims, wherein the number of intermediate friction discs (27) is at least three. Lockabie friction joint (1) according to any of the proceeding ciaims, wherein thefriction joint (1) is mounted on the exterior of the pipe sections (3) of the pipe system (5) on which it is mounted. Lockahie friction joint (1) according to any of the proceeding ciaims, wherein the friction joint (1) is integrated in a piping system (5), wherein the arm members (13, 27) are pipes ofthe Pipe sVstem m'
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    同族专利:
    公开号 | 公开日
    SE539483C2|2017-10-03|
    EP3420262A4|2019-10-16|
    US11022244B2|2021-06-01|
    US20190049045A1|2019-02-14|
    CN108713119A|2018-10-26|
    CN108713119B|2021-01-29|
    WO2017146630A1|2017-08-31|
    EP3420262A1|2019-01-02|
    引用文献:
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    SE358753B|1972-10-09|1973-08-06|Holmbom & Hedlund Ab|
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    WO2011087543A1|2009-12-22|2011-07-21|Musco Corporation|Apparatus, method, and system for adjustably affixing lighting fixtures to structures|
    DE102015203541B3|2015-02-27|2016-06-02|Thyssenkrupp Ag|Locking device for an adjustable steering column for a motor vehicle|USD900297S1|2018-06-11|2020-10-27|Fumex Ab|Combined ventilation hood and arm|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1650232A|SE539483C2|2016-02-23|2016-02-23|Lockable friction joint|SE1650232A| SE539483C2|2016-02-23|2016-02-23|Lockable friction joint|
    CN201780011873.4A| CN108713119B|2016-02-23|2017-02-08|Lockable friction joint for adjusting relative pivotal positioning of pipe segments|
    PCT/SE2017/050122| WO2017146630A1|2016-02-23|2017-02-08|Lockable friction joint for adjustment of relative pivotal positioning of pipe sections|
    US16/078,598| US11022244B2|2016-02-23|2017-02-08|Lockable friction joint for adjustment of relative pivotal positioning of pipe sections|
    EP17756920.9A| EP3420262A4|2016-02-23|2017-02-08|Lockable friction joint for adjustment of relative pivotal positioning of pipe sections|
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