WO2017037088A1 - Embrayage de sécurité relié à une unité d'abaissement pour une armoire - Google Patents

Embrayage de sécurité relié à une unité d'abaissement pour une armoire Download PDF

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Publication number
WO2017037088A1
WO2017037088A1 PCT/EP2016/070460 EP2016070460W WO2017037088A1 WO 2017037088 A1 WO2017037088 A1 WO 2017037088A1 EP 2016070460 W EP2016070460 W EP 2016070460W WO 2017037088 A1 WO2017037088 A1 WO 2017037088A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotatable part
pull
down unit
housing
safety clutch
Prior art date
Application number
PCT/EP2016/070460
Other languages
English (en)
Inventor
Kurt VANG
Original Assignee
Nobia Ab
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 Nobia Ab filed Critical Nobia Ab
Priority to EP16760694.6A priority Critical patent/EP3344092A1/fr
Publication of WO2017037088A1 publication Critical patent/WO2017037088A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B51/00—Cabinets with means for moving compartments up and down
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
    • A47B88/50—Safety devices or the like for drawers
    • A47B88/53—Safety devices or the like for drawers preventing unintentional closing, e.g. anti-pinch devices
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D11/14—Clutches in which the members have interengaging parts with clutching members movable only axially
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2021—Screw mechanisms with means for avoiding overloading
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2025—Screw mechanisms with means to disengage the nut or screw from their counterpart; Means for connecting screw and nut for stopping reciprocating movement

Definitions

  • the invention relates to a safety clutch connected to a pull-down unit for a cabinet, which pull-down unit is connected movable to the cabinet by a linear actuator.
  • a vertical moving furniture part or a pull down unit can be positioned.
  • the pull down unit can be used for storing items in the back of a cabinet and when lowering the pull down unit, the user will have easy access to the items. Moreover, the items in the not movable part of the cabinet will also be easier to access and to overview.
  • Such a piece of furniture is known from EP 2 31 1 346 A1 , where the piece of furniture has a horizontally arranged closing plate i.e. table board, and a pull- out or pull-down unit.
  • the pull-out unit is closed using the closing plate in a closed condition, and protruded over the closing plate in a vertical manner in an opened condition.
  • a separation wall is provided between an inner region of the piece of furniture and the pull-out unit.
  • the closing plate is a bottom of a wall cupboard or a wall shelf.
  • the pull-out unit is arranged at a side of the piece of furniture facing the wall and parallel to the wall.
  • the pull down unit is conveniently provided with a linear actuator, to move the pull down unit down for access of stored items and up to hide the stored items and to bring the pull down unit into storing position, thereby hiding the pull down unit in the rear of the cabinet.
  • a cabinet with a pull-down unit is known.
  • the pull-down unit is provided with a linear actuator for moving the unit up and down in relation to the cabinet.
  • the linear actuator comprising a housing with a reversible low voltage DC-motor and a transmission. At the end of the housing there is a spindle. On the spindle there is a spindle nut to which is connected a tube shaped rod 7 with a square cross section.
  • the linear actuator is provided with a squeeze protection based on a piezo element.
  • a piezo element as the only squeeze protection can have some drawbacks. If the element somehow gets prevented from stopping the movement of the pull-down unit there is a risk for squeezing. Therefore a simple safety clutch alone or in combination with an electronic squeeze protection will provide more protection against squeezing.
  • the purpose of the invention is to provide a simple and safe squeeze protection for a piece of furniture as mentioned above.
  • a linear actuator used for movement in the pull-down unit is more or less a standard component and comprises an electric motor, which motor through a gear or transmission drives a spindle in shape of a threaded rod to rotate around its longitudinal axis.
  • the spindle having an external threading is rotated in a nut or bushing, having a complementary internal threading.
  • the nut or bushing is mounted securely in a tube in such a way that the nut or bushing will not move or rotate in relation to the tube.
  • the spindle is positioned substantially concentric in the tube.
  • the tube will be moved in a longitudinal direction in relation to the spindle.
  • a clutch according to the invention connected to an end of the tube, which clutch in engaged position prevents the tube from rotating, and thereby the nut, in relation to the rotating spindle, the clutch will be moved together with the tube.
  • a simple and safe squeeze protection is therefore provided by a safety clutch connected to a pull-down unit for a cabinet, which pull-down unit is connected movable to the cabinet by a linear actuator, where the safety clutch is provided between the linear actuator and the pull-down unit, which clutch comprises a rotatable part, which rotatable part is rotatable in relation to a housing fixed to the pull-down unit, and that the rotatable part is arranged axially movably in relation to the housing.
  • the rotatable part comprises an upper rotatable part, a lower rotatable part, which upper and lower rotatable part is connected by a cylindrical axle part.
  • the housing on its lower side is provided with a number of engagement parts and that the lower rotatable part on its upper side is provided with a number of complementary engagements parts.
  • the engagements parts are formed by teeth or ridges and grooves.
  • a groove in the housing is more than 1 mm wider than a tooth or ridge on the upper side of the lower rotatable part.
  • a groove on the upper side of the lower rotatable part is more than 1 mm wider than a tooth or ridge in the housing.
  • a groove in the housing is more than 4mm wider than a tooth or ridge on the upper side of the lower rotatable part.
  • a groove on the upper side of the lower rotatable part is more than 4mm wider than a tooth or ridge in the housing.
  • the upper rotatable part or the lower rotatable part is formed integral with the cylindrical axle.
  • the cylindrical axle is connected and fixed unrotatably in relation to the upper rotatable part or to the lower rotatable part by a spline and groove connection.
  • the clutch is provided with a rotating part, configured to rotate in a housing, which housing is attached to or integral with a bracket.
  • the bracket is provided with common fastening means, for example the bracket can be provided with holes through which screws or other common fastening means can be inserted when fastening the bracket to a part of the pull down unit or to another part, which is fastened in relation to the pull down unit.
  • the pull down unit can advantageously be guided by one or more substantially vertical guide rails, grooves or the like provided at the sides of the pull-down unit and/or at the back of the pull-down unit in the space between the cabinet and the pull-down unit.
  • the linear actuator is positioned in order to let the movement take place in a substantial vertical direction. It should be understood that optimally the movement should be in a vertical direction, but tolerances within building industry should be able to be accepted.
  • the housing is provided with a number of engagement parts in shape of for example grooves and teeth or ridges for engagement with complementary engagement parts, for example teeth or ridges and grooves on the rotatable part.
  • the rotatable part which is placed in a bore in shape of a drilled or in other common way provided hole, is provided with a cylindrical axle, which axle connects an upper part of the rotatable part with a lower part of the rotatable part.
  • the axle and the rotatable part can be secured to each other by a fastening screw and a spline/groove connection in such a way that the upper and the lower rotatable part is fixed in relation to each other and, at the same time, able to rotate in the bore, if not prevented by the engagement parts.
  • the axle is longer than the bore and the axle is able to be moved in relation to the bore in axial direction, thereby being able to let the lower rotatable part rotate when the rotatable part is displaced in axial direction in relation to the bore and the housing in such a way that the engagement parts are not engaged.
  • the rotatable part will continue its downwards motion together with the tube and spindle, until the engagement parts of the lower rotatable part and the housing is no longer engaged.
  • the rotatable part can rotate freely, and the tube will therefore also rotate, which means that the nut within the tube will not rotate in relation to the spindle and the downwards movement is stopped and the only weight on the obstruction will be the weight from the pull-down unit and its content.
  • Figure 1 shows schematically a clutch secured to an end of a linear actuator and to a pull-down unit, with the clutch in engaged position
  • Figure 2 shows schematically the clutch secured to the end of a linear actuator and to a pull-down unit, with the clutch in disengaged position
  • Figure 3 shows schematically a perspective view of the clutch in engaged position
  • Figure 4 shows schematically an exploded view of the clutch showing an embodiment of the rotatable part separated from each other; and Figure 5 shows schematically an exploded side view of the clutch.
  • the safety clutch 1 comprises a bracket 2, which bracket 2 can be secured or fastened to a moveable furniture part 3 of a cabinet (not shown) by common means for fastening such as screws or bolts or by other fastening methods.
  • a movable furniture part 3 can be called a pull down unit.
  • a linear actuator is used for movement of the pull-down unit 3 in the cabinet.
  • the linear actuator (not shown) is more or less a standard component and comprises an electric motor, which motor through a gear or transmission drives a spindle in shape of a threaded rod to rotate around its longitudinal axis.
  • the spindle having an external threading is rotated in a nut or bushing, having a complementary internal threading.
  • the nut or bushing is mounted securely in a tube 10 in such a way that the nut or bushing will not move or rotate in relation to the tube 10.
  • the spindle is positioned substantially concentric in the tube 10. When the spindle rotates in the nut or bushing, the nut or bushing will be moved towards one end of the spindle and in the direction of the rotation of the spindle is reversed, the nut or bushing will be moved towards the opposite end of the spindle.
  • the tube 10 will be moved in a longitudinal direction in relation to the spindle.
  • the clutch 1 is provided with a rotatable part 4, 5, 6, configured to rotate in a housing 7, which housing 7 is attached to or integral with the bracket 2.
  • the bracket 2 is provided with common fastening means 8, 9, for example the bracket 2 can be provided with holes 8 through which screws or other common fastening means 9 can be inserted when fastening the bracket 2 to a part of the pull down unit 3 or to another part, which is fastened in relation to the pull down unit 3.
  • the rotatable part 4, 5, 6 is by its upper rotatable part 4 is firmly connected to the tube 10 of the linear actuator.
  • the upper rotatable part 4 is normally part of the linear actuator together with the tube 10.
  • the pull down unit 3 can advantageously be guided by one or more substantially vertical guide rails, grooves or the like (not shown) provided at the sides of the pull-down unit 3 and/or at the back of the pull-down unit 3 in the space between the cabinet and the pull-down unit 3.
  • a linear actuator 10 is positioned in order to let the movement take place in a substantial vertical direction. It should be understood that optimally the movement should be in a vertical direction, but tolerances within building industry should be able to be accepted.
  • the housing 7 is provided with a number of engagement parts 12 in shape of for example grooves and teeth or ridges for engagement with complementary engagement parts 12, for example teeth or ridges and grooves on the rotatable part 4, 5, 6..
  • the axle 5 and the rotatable part can be secured to each other by a fastening screw and a spline/groove connection 14 in such a way that the upper 4 and the lower rotatable part 6 is fixed in relation to each other and, at the same time, able to rotate in the bore 13, if not prevented by the engagement parts 12.
  • the axle 5 is longer than the bore 13 and the axle 5 is able to be moved in relation to the bore 13 in axial direction, thereby being able to let the lower rotatable part 6 rotate when the rotatable part 4, 5, 6 is displaced in axial direction in relation to the bore 13 and the housing 7 in such a way that the engagement parts 12 are not engaged.
  • weight of the unit 3 itself or from items stored in the unit in addition will force the pull-down unit 3 and its content (not shown) in a downwards direction. Thereby the bracket 2 and the housing 7 are forced downwards.
  • the upper rotatable part 4 of the clutch 1 which is firmly connected to a tube 10 of the linear actuator, will then cause that the clutch 1 will act against the downward forces and hold the weight of the pull-down unit 3.
  • the engagement means 12 are pulled together limiting or preventing the rotatable part 4, 5, 6 from rotating in relation to the housing 7. This will also limit or prevent rotation of the tube 10 of the linear actuator and the linear actuator will move the pull-down unit 3 upwards or downwards, depending on the direction or rotation of the spindle in the linear actuator.
  • the rotatable part 4, 5, 6 can rotate freely, and the tube 10 will therefore also rotate, which means that the nut within the tube 10 will not rotate in relation to the spindle and the downwards movement is stopped and the only weight on the obstruction will be the weight from the pull-down unit 3 and its content.
  • the clutch 1 is engaged for further operation by simply removing the obstruction, whereby the pull-down unit 3 moves downwards until the engagement parts 12 re-engages. Then the pull-down unit 3 can be operated normally again.
  • the upper rotatable part 4 can be assembled to the axle 5 and the lower rotatable part 6 by a screw or bolt through a longitudinal hole in the axle 5.
  • a friction in the bore 13 between the axle 5 and the housing 7 can be provided in order to establish a starting torque. This will ensure that if the pull-down unit 3 is stopped in its downwards movement and a user changes the direction of the unit 3 to be moved upwards by changing direction of rotation of the spindle, then the linear actuator will be activated to move the tube 10 and the rotatable part 4, 5, 6 of the clutch 1 upwards and thereby bring the engagement parts 12 into an engaged position.
  • the housing is provided with a smooth and plane surface in order to let the upper rotatable part 4 rotate in relation to the housing 7 even if the upper rotatable part 4 is in contact with the upper side 16 of the housing 7.
  • a bearing could be provided between the upper side 16 of the housing 7 and the upper rotatable part 4.
  • the bearing (not shown) can be provided in relation to the bore 13 through the housing 7 in shape of a bushing, in which the rotatable part 4, 5, 6 can rotate in relation to the housing 7.
  • a sensor (not shown) can be provided to detect movement of the pull-down unit 3 in relation to the cabinet in order to be able to stop the linear actuator from running in no-load condition.
  • a sensor can be provided to detect movement of the pull-down unit 3 in relation to the cabinet in order to be able to stop the linear actuator from running in no-load condition.
  • the pull-down unit 3 meets an obstruction on its way down, whereby the clutch 1 is axially displaced to disengage the engagement parts 12 and enable rotation of the rotatable part 4, 5, 6 of the clutch 1 and thereby the tube 10 of the linear actuator, which action will let the actuator rotate without extending further in an axial direction of the linear actuator, more specific in a downwards direction.
  • the motor of the linear actuator can be stopped automatically by a timer or another type of switch, in order to stop the spindle from rotating unnecessary until it is activated again.
  • the linear actuator can be provided with a known safety device in order to apply safety when the pull-down unit 3 is activated to be retracted into the cabinet also to avoid that objects and in particular hands, fingers or other body parts of a person will get jammed between the movable furniture part and the cabinet.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

La présente invention concerne un embrayage de sécurité relié à une unité d'abaissement pour une armoire, ladite unité d'abaissement étant reliée mobile à l'armoire par un actionneur linéaire. L'embrayage de sécurité (1) est prévu entre l'actionneur linéaire et l'unité d'abaissement (3), et l'embrayage (1) comprend une partie rotative (4, 5, 6), ladite partie rotative (4, 5, 6) étant rotative par rapport à un boîtier (7) fixé à l'unité d'abaissement (3) et la partie rotative (4, 5, 6) étant placée de manière axialement mobile par rapport au boîtier (7).
PCT/EP2016/070460 2015-09-01 2016-08-31 Embrayage de sécurité relié à une unité d'abaissement pour une armoire WO2017037088A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16760694.6A EP3344092A1 (fr) 2015-09-01 2016-08-31 Embrayage de sécurité relié à une unité d'abaissement pour une armoire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1551128-0 2015-09-01
SE1551128A SE539553C2 (en) 2015-09-01 2015-09-01 Safety clutch connected to a pull down unit for a cabinet

Publications (1)

Publication Number Publication Date
WO2017037088A1 true WO2017037088A1 (fr) 2017-03-09

Family

ID=56877018

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/070460 WO2017037088A1 (fr) 2015-09-01 2016-08-31 Embrayage de sécurité relié à une unité d'abaissement pour une armoire

Country Status (3)

Country Link
EP (1) EP3344092A1 (fr)
SE (1) SE539553C2 (fr)
WO (1) WO2017037088A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018210384A1 (fr) * 2017-05-15 2018-11-22 Linak A/S Actionneur linéaire et meuble à tiroirs

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9213902U1 (de) * 1992-10-15 1992-12-17 Armo Gesellschaft für Bauelemente, Bau- und Wohnbedarf mbH, 4350 Recklinghausen Mobiler Deckencontainer
WO2006024346A1 (fr) * 2004-08-27 2006-03-09 SCHALITZ, Günter Dispositif pour abaisser et relever au moins une armoire suspendue, notamment une armoire suspendue de cuisine
EP2311346A1 (fr) 2009-09-23 2011-04-20 Marcèl Roth Meuble
WO2011072686A1 (fr) 2009-12-17 2011-06-23 Linak A/S Armoire à fixation murale
DE202011000964U1 (de) * 2011-04-21 2012-07-23 Dewert Antriebs- Und Systemtechnik Gmbh Elektromotorischer Linearantrieb
DE202013105249U1 (de) * 2013-11-20 2015-02-27 Dewertokin Gmbh Elektromotorischer Linearantrieb

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9213902U1 (de) * 1992-10-15 1992-12-17 Armo Gesellschaft für Bauelemente, Bau- und Wohnbedarf mbH, 4350 Recklinghausen Mobiler Deckencontainer
WO2006024346A1 (fr) * 2004-08-27 2006-03-09 SCHALITZ, Günter Dispositif pour abaisser et relever au moins une armoire suspendue, notamment une armoire suspendue de cuisine
EP2311346A1 (fr) 2009-09-23 2011-04-20 Marcèl Roth Meuble
WO2011072686A1 (fr) 2009-12-17 2011-06-23 Linak A/S Armoire à fixation murale
DE202011000964U1 (de) * 2011-04-21 2012-07-23 Dewert Antriebs- Und Systemtechnik Gmbh Elektromotorischer Linearantrieb
DE202013105249U1 (de) * 2013-11-20 2015-02-27 Dewertokin Gmbh Elektromotorischer Linearantrieb

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018210384A1 (fr) * 2017-05-15 2018-11-22 Linak A/S Actionneur linéaire et meuble à tiroirs

Also Published As

Publication number Publication date
SE539553C2 (en) 2017-10-10
EP3344092A1 (fr) 2018-07-11
SE1551128A1 (en) 2017-03-02

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