EP3919770B1 - Teleskopschiene - Google Patents

Teleskopschiene Download PDF

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Publication number
EP3919770B1
EP3919770B1 EP20178409.7A EP20178409A EP3919770B1 EP 3919770 B1 EP3919770 B1 EP 3919770B1 EP 20178409 A EP20178409 A EP 20178409A EP 3919770 B1 EP3919770 B1 EP 3919770B1
Authority
EP
European Patent Office
Prior art keywords
rail
guide
rail element
pull
telescopic
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.)
Active
Application number
EP20178409.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3919770A1 (de
Inventor
Christian SATONY
Christoph Neuhaus
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.)
Accuride International GmbH
Original Assignee
Accuride International GmbH
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 Accuride International GmbH filed Critical Accuride International GmbH
Priority to EP20178409.7A priority Critical patent/EP3919770B1/de
Priority to PCT/EP2021/063953 priority patent/WO2021244907A1/de
Priority to CN202180038781.1A priority patent/CN115698530A/zh
Priority to US17/919,610 priority patent/US20230337820A1/en
Publication of EP3919770A1 publication Critical patent/EP3919770A1/de
Application granted granted Critical
Publication of EP3919770B1 publication Critical patent/EP3919770B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
    • A47B88/40—Sliding drawers; Slides or guides therefor
    • A47B88/49—Sliding drawers; Slides or guides therefor with double extensible guides or parts
    • A47B88/493—Sliding drawers; Slides or guides therefor with double extensible guides or parts with rollers, ball bearings, wheels, or the like
    • 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
    • A47B88/40—Sliding drawers; Slides or guides therefor
    • A47B88/453—Actuated drawers
    • A47B88/457—Actuated drawers operated by electrically-powered actuation means
    • 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
    • A47B88/40—Sliding drawers; Slides or guides therefor
    • A47B88/44—Sequencing or synchronisation of drawer slides or functional units
    • A47B88/447—Simultaneous movement of rails within drawer slides, i.e. with a coordination of movement with all rail elements moving at the same time
    • 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
    • A47B88/40—Sliding drawers; Slides or guides therefor
    • A47B88/453—Actuated drawers
    • A47B88/46—Actuated drawers operated by mechanically-stored energy, e.g. by springs
    • 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
    • A47B2210/00—General construction of drawers, guides and guide devices
    • A47B2210/0002—Guide construction for drawers
    • A47B2210/0064—Guide sequencing or synchronisation
    • A47B2210/007—Three slide synchronisation
    • 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
    • A47B2210/00—General construction of drawers, guides and guide devices
    • A47B2210/0002—Guide construction for drawers
    • A47B2210/0064—Guide sequencing or synchronisation
    • A47B2210/0072—Coordinating mechanisms for sequential drawer slides, e.g. by cable

Definitions

  • the present invention relates to a telescopic rail with a first rail element, a second rail element, a third rail element and a drive device, the first rail element and the second rail element being mounted on one another in such a way that the first rail element and the second rail element are linear in relation to one another in and counter to an extension direction are displaceable, with the third rail element and the second rail element being mounted on one another in such a way that the third rail element and the second rail element can be linearly displaced in relation to one another in and counter to the pull-out direction, with the drive device being mounted on the first rail element or on one connected to the first rail element connectable holding element can be stored and the drive device is designed such that the drive device in an operation of the telescopic rail against a linear displacement movement of the second rail element causes en undergraduate the first rail element in or against the pull-out direction.
  • Telescopic rails with two or more rail elements and a guide between each two rail elements are known in a variety of embodiments from the prior art.
  • the guide between two rail elements is implemented in the form of a rolling element cage.
  • rolling elements are accommodated in the rolling element cage in order to reduce the friction between the rail elements during an extension movement.
  • Telescopic rails are used in various household appliances, but also in automobile construction, in furniture construction and in many other applications.
  • US2267043A discloses a telescopic rail with a traction element.
  • telescopic rails with a force support for example in the form of a spring preload of one rail element relative to another
  • motor-driven telescopic rails are known in which the displacement movement of one rail element relative to another rail element is brought about by an electric drive.
  • the object of the present invention is to provide a telescopic rail which enables a power-assisted or motor-driven extension or retraction movement of three or more rail elements of a telescopic rail.
  • it is an object of the invention to provide such a telescopic rail that manages with a small number of components.
  • a telescopic rail with good integrability of the drive in existing constructions of the rail elements should be created.
  • a telescopic rail with a first rail element, a second rail element, a third rail element and a drive device
  • the first rail element and the second rail element being mounted on one another in such a way that the first rail element and the second rail element are in and are linearly displaceable relative to one another counter to a pull-out direction
  • the third rail element and the second rail element being mounted on one another in such a way that the third rail element and the second rail element are linearly displaceable relative to one another in and counter to the pull-out direction
  • the drive device being mounted on the first rail element or on one with the first rail element connectable holding element is storable
  • the drive device is configured such that the drive device in an operation of the telescopic rail a linear displacement movement of the second rail element relative to the first rail element in or counter to the extension direction causes the telescopic rail to have a pulling element, the pulling element being fixed to the first rail element and to the third rail element and the pulling element being
  • the basic idea of the present invention is to use a pulling element to couple a retraction or extension movement in or against the extension direction of the third rail element relative to the second rail element to a retraction or extension movement of the provide the second rail element with respect to the first rail element.
  • the coupling of the two retraction or extension movements according to the invention saves space in one embodiment and is cost-effective in one embodiment.
  • the pull-out direction in the sense of the present application denotes the possible direction of movement of a rail element relative to another rail element from a pushed-in to a pulled-out position.
  • the pull-in movement takes place in the opposite direction to the pull-out direction.
  • a relative movement between two rail elements in the extension direction is referred to as an extension movement, a relative movement of two rail elements counter to the extension direction as a retraction movement.
  • the second rail element has a first guide element with a first deflection surface and a second guide element with a second deflection surface, the first guide element being designed in such a way that the first guide element transfers a tensile force in the extension direction from the second rail element to the pulling element can be transferred, wherein the second guide element is designed in such a way that a pulling force can be transferred from the second rail element to the pulling element against the pull-out direction with the second guiding element, and wherein the pulling element is deflected by the first and second deflection surfaces in such a way that a displacement movement of the second rail element causes a transmission of a tensile force from the tension element in relation to the first rail element in or counter to the pull-out direction to the third rail element.
  • the first deflection surface of the first guide element has a surface normal with at least one component in a direction in the extension direction and the second deflection surface of the second guide element has a surface normal with at least one component in a direction opposite to the extension direction.
  • the first deflection surface and the second deflection surface are curved surfaces, preferably arcuate surfaces, so that when the pulling element is in contact with the deflecting surfaces, the pulling element follows the shape of the deflecting surfaces.
  • At least the first guide element or the second guide element has a pair of opposing, mutually facing tension element guide surfaces, the tension element guide surfaces being designed in such a way that they guide the tension element in a direction perpendicular to the extension direction.
  • the traction element guide surfaces serve to center the movement of the traction element and prevent the traction element from skipping over.
  • At least the first or the second deflection surface is designed in such a way that it deflects the traction element by 180°, the deflection surface having a recess so that the traction element is in frictional engagement with the deflection surface over an angular range of less than 180°.
  • Such a design of the first or the second deflection surface or both deflection surfaces enables an effective deflection of the pulling element by 180° in each case, with the pulling element only being in frictional engagement with the respective deflecting surface over a shortened area, so that the frictional forces are reduced.
  • the recess extends over an angular range of less than 180°, preferably 120° or less and particularly preferably 90° or less. Although it is important to make the recess as large as possible to reduce friction, effective deflection must still be ensured at the same time.
  • the guide element is selected from a curved guide surface, a cylinder, a pin, a wheel and a roller.
  • Guide elements such as wheels and rollers that can be pivoted or rotated relative to the second rail element reduce the frictional forces that occur.
  • the guide elements are at a distance from one another that is at least as great as the maximum travel of the third rail element relative to the second rail element.
  • the tension element guide surfaces are designed in such a way that they guide the tension element in a transverse direction, ie transversely to the longitudinal extent of the tension element, in order to prevent the tension element from slipping sideways relative to the rail element.
  • An example of a configuration of the guide element with lateral guide surfaces is the formation of a groove, the bottom of which is the respective guide surface of the guide element, so that the pulling element is also guided in the transverse direction.
  • At least the first guide element or the second guide element has a stationary holding section fixed to the second rail element and a deflection section that can be displaced in the extension direction and fixed to the holding section, the deflection section comprising the deflection surface of the guide element and the deflection section having a
  • the spring element is resiliently prestressed in or against the extension direction in relation to the holding section in such a way that the tension element is tensioned. In this way, the guide element can be used to prestress the pulling element. If the pulling element is pretensioned, this ensures that the telescopic rail runs without play when it is pulled out and pulled in. By changing the spring force of the spring element, the movement force that results from the wrap-around friction of the pulling element on the deflection surfaces can be changed.
  • the holding section and the deflection section have a detent and a detent indentation, the detent and the detent indentation being designed to complement one another, the detent and the detent indentation being arranged on the holding section and the deflection section in such a way that the detent and the Detent depression form an end stop for a displacement movement of the deflection section relative to the holding section.
  • Such a configuration in the manner of a snap hook and the associated undercut provides a loss-prevention device for the spring-loaded guide of the pulling element in a simple manner.
  • assembly is possible simply by inserting the deflection section into the holding section. The deflection section and the holding section then latch with one another.
  • the telescopic rail has two traction elements, the first guide element having two first deflection surfaces, one of the two traction elements being deflected on each of the first deflection surfaces, the second guide element having two second deflection surfaces, with each of the second deflection surfaces one of the two traction elements is deflected.
  • the first and second guide elements are each equipped with two deflection surfaces, so that the telescopic rail can be equipped with one or two tension members, depending on the choice, for example depending on the load case to be expected.
  • the pulling element has a latching projection on a surface that comes into frictional engagement with the deflection surface.
  • a projection on the pulling element serves to interact with a recess in the respective deflection surface Detent position of the movement of the tension member relative to the deflection surfaces and thus provide a detent position of the rail elements in their movement against each other.
  • the telescopic rail has a roller cage with roller bodies accommodated therein and guided between the running surfaces of the second rail element and the third rail element, with at least the first guide element or the second guide element forming a stop for a movement of the roller cage in or against the extension direction .
  • the ball cage is a strip ball cage. In this way, full utilization of the installation space within the rails can be guaranteed.
  • the ball cage is a ball cage with a bridge that connects the ball cage sections between the individual running surfaces of the rail elements.
  • the first guide element and/or the second guide element has a clearance, past which the first or the third rail element can be guided.
  • pre-assembly of the second rail element i.e. the middle rail, in particular with the guide elements, is possible, while in final assembly the first and third rail elements can be assembled without colliding with the guide elements.
  • the drive device is selected from a spindle drive, a toothed belt drive, a rack and pinion drive, a flexible shaft, a push rod, a push element, a pull element, a cable pull, a gas pressure spring, a hydraulic or pneumatic cylinder and a mount for a linear motor or a combination thereof.
  • a drive device can be coupled to an electric drive, so that the electric drive itself can be provided outside the telescopic rail.
  • the telescopic rail comprises an electric drive which drives the drive device, i.e. is coupled to it.
  • This electric drive is then part of the telescopic rail.
  • An example of a suitable electric drive is a rotary electric motor or an electromagnetic linear drive.
  • the drive device is a spindle drive with one that is rotatable relative to the first rail element and is mounted stationary in the extension direction Threaded spindle and an internal thread fixed in the pull-out direction on the second rail element.
  • the internal thread can be fixed on the first or second guide element or on an additional element connected to the second rail element.
  • the internal thread is floatingly mounted as a section of a spindle nut in at least one direction perpendicular to the pull-out direction.
  • a floating mounting of the internal thread of the spindle drive in a direction perpendicular to the pull-out direction serves to compensate for the tolerance play in the interaction of the rail elements and the threaded spindle.
  • the spindle can beat more and does not have to be guided very precisely.
  • a further precise bearing of the end of the threaded spindle on the second rail element is omitted.
  • the spindle nut with the internal thread is mounted in the first or the second guide element.
  • the internal thread is floatingly mounted as a section of a spindle nut in at least one direction perpendicular to the extension direction with a spindle nut play in the first or the second guide element, wherein the threaded spindle is guided in a spindle receiving bore through the first or second guide element, wherein the Threaded spindle has a spindle play in the spindle receiving bore, the spindle play being less than or equal to the spindle nut play.
  • beating of the threaded spindle can be reduced. A centering of the threaded spindle is made possible.
  • the internal thread is a section of a spindle nut, with the spindle nut having a torque arm, which introduces torque transmitted from the threaded spindle to the spindle nut into the first or the second guide element.
  • a torque arm In addition to absorbing and introducing torques, a torque arm also enables the formation of a unique assembly orientation to simplify the assembly of the telescopic rail.
  • the spindle nut is a spring-loaded lock nut.
  • a closing nut serves as overload protection. If the torque acting on the spindle nut is too great, the lock nut opens against the spring force and the rotary movement of the threaded spindle is no longer transmitted to the spindle nut.
  • an electromagnetic spindle nut separator which clamps the threaded spindle in the de-energized state in order to provide a braking effect in this way.
  • the second rail element has an axial bearing for the threaded spindle.
  • the bearing is designed in the form of a bearing plate bent out of the back of the rail of the first rail element.
  • the axial bearing of the first rail element is designed as a separate plastic part which is connected to the second rail element.
  • the pulling element is selected from a chain, a rope, a belt and a band or a combination thereof.
  • the traction element comprises an elastic or an inelastic material or a combination thereof.
  • the pulling element is a flexible band, in particular a flexible band with a low coefficient of friction, preferably a band made of spring steel.
  • the pulling element is designed in one piece.
  • the traction element is a one-piece endless traction element, preferably an endless belt.
  • the pulling element is designed in one piece, but two ends of the one-piece pulling element are joined or connected to one another.
  • the ends of the pulling member are riveted or screwed together.
  • a spring return plate is used to hold the two ends of the pulling element, preferably the two ends of a strap, together. The pulling element hooks into such a spring return plate in the manner of a cable tie.
  • the tension element is designed in two parts with a first tension element section deflected around the first deflection surface and a second tension element section deflected around the second deflection surface, with the first and second tension element sections each being fixed to the first rail element and the third rail element .
  • a two-part tension element enables a simplified fixing or mounting of the tension element on the first and the third rail element.
  • two fastening elements connect the first and second traction element sections to form a closed traction element.
  • the two fastening elements are fastened to the first and third rail element, respectively.
  • ears in the fasteners are hooked into pegs on the first and third track members.
  • the telescopic rail has at least one fastening element which is connected to the first rail element or the third rail element, with the fastening element having at least one hook, with at least one end of at least the first pull element section and one end of the second pull element section having a hanging loop , whereby the suspension loop is hooked into the hook of the fastening element.
  • a two-part pulling element also enables the pulling element to be easily provided in different lengths.
  • a one-piece, closed tension element is only suitable for exactly one length of the second rail element.
  • the division of the tension member into the first and second tension member sections is provided between the two fixing points on the first rail element and on the third rail element.
  • the pulling element and/or its guide on at least the first, the second or the third rail element is designed in such a way that both pulling forces and pushing forces can be transmitted with the pulling element, with the second rail element having a guide element, with the guide element is designed in such a way that the guide element can be used to transfer both a tensile force and a shearing force from the second rail element to the pulling element, and the pulling element is deflected by the guiding element in such a way that both a pulling force acting on the pulling element and a pulling force acting on the pulling element Pushing force causes a displacement movement of the third rail element in or against the extension direction relative to the second rail element.
  • the pulling element can be designed to be open, i.e. it does not have to form a closed ring. In this way, space can be saved.
  • the pulling member comprises or is made of an electrically conductive material.
  • Steel and carbon fibers are examples of electrically conductive materials in this sense.
  • the pulling element consists of an electrically conductive sheet steel.
  • the traction element is woven or knitted plastic fibers, with electrically conductive wires or fibers being woven or knitted into the woven or knitted fabric.
  • the first and/or the second guide element also comprise at least one electrically conductive section, this electrically conductive section being electrically conductively connected to the second rail element.
  • the traction element which comprises or is made of the electrically conductive material, is electrically conductively connected to the first and/or the third rail element.
  • equipotential bonding can be provided between all three rail elements or between two selected rail elements.
  • a telescopic rail is mentioned, this term is to be understood in such a general way that not only rails are included in which the first rail element and the further rail elements have approximately the same length, but also linear guides, in which another rail element is significantly shorter than the first rail element.
  • the telescopic rail according to the invention has first, second and third rail elements, this does not exclude the telescopic rail from comprising further rail elements.
  • at least one further rail element is also synchronized with the extension movement of another rail element via the construction according to the invention with a pulling element and its guide.
  • the first rail element of the telescopic rail is the stationary rail element which, when installed, is connected to a stationary element, for example a body of a piece of furniture.
  • a stationary element for example a body of a piece of furniture.
  • the second and the third rail element are moved relative to the stationary element.
  • At least the first rail element or the second rail element or the third rail element is made of a material selected from a group consisting of sheet steel, aluminized sheet steel, stainless steel, aluminum and plastic.
  • rail elements made of plastic injection molding allow the guide elements to be integrated directly into the third rail element.
  • the first rail element has two running surfaces
  • the second rail element has four running surfaces
  • the third rail element has two running surfaces
  • a plurality of rolling elements and/or sliding bodies between the two running surfaces of the first rail element and two running surfaces of the second Rail elements are arranged so that the first rail element and the second rail element can be displaced linearly in relation to one another in or counter to the extension direction, and are arranged between the two running surfaces of the third rail element and two running surfaces of the second rail element, so that the third rail element and the second rail element move in an extension direction are linearly displaceable against each other.
  • the first rail element, the second rail element and the third rail element each have legs which carry the running surfaces for the rolling bodies and a back section connecting the two legs.
  • Rolling elements within the meaning of the present invention can be balls or cylinders, for example. It goes without saying that in one embodiment of the invention the rolling elements are guided between the rail elements with the aid of a rolling element cage, in particular a ball cage.
  • the rolling element cage can be a split, strip-shaped cage or else a one-piece cage with a back connecting the guiding sections between opposite pairs of guiding surfaces.
  • Two groups of drives can be considered as the drive device for the linear displacement movement of the second rail element relative to the first rail element.
  • these are drives that only provide power assistance, for example by means of a spring preload or a pneumatic element.
  • drives can be considered which can be connected to an electric drive or are connected to such an electric drive, so that the extension movement and/or the retraction movement is motor-driven.
  • a pull-out arrangement with a holding element, in particular a body, for example a piece of furniture, and a receiving element that can be moved relative to the holding element, in particular a drawer, and two telescopic rails arranged opposite one another and with parallel pull-out directions, see above as previously described in embodiments thereof, wherein the first rail element of each telescopic rail is connected to the holding element and the third rail element of each telescopic rail is connected to the receiving element.
  • Figures 15a and 15b show an embodiment of a two-part traction element.
  • the telescopic rails 4 discussed below with reference to the illustrations from the figures all have exactly three rail elements, namely a first rail element 1, a second rail element 2 and a third rail element 3.
  • the first rail element 1 forms an outer rail and the second rail element one Center rail and the third rail element 3 an inner rail of the telescopic rail 4.
  • the considered embodiments of the telescopic rail 4 are full extensions, i.e. the third rail element 3 can be extended to its full length compared to the first rail element 1, so that it no longer has an overlap with the first rail element 1 in the extension direction 7.
  • the first rail element 1 is a fixed rail element, for example connected to a body of a piece of furniture.
  • the rail elements 1, 2, 3 are slidably mounted on one another in pairs.
  • the second rail element 2 is slidably mounted on the first rail element 1 and the third rail element 3 is slidably mounted on the second rail element 2 .
  • the middle rail element 2 consists of two rails which are connected to one another in a materially bonded manner at the back and each have two running surfaces.
  • the schematic diagram figure 1 makes it possible to illustrate the principle of coupling a displacement movement of the second rail element 2 relative to the first rail element 1 to a displacement movement of the third rail element 3 relative to the second rail element 2 on which the invention is based.
  • the coupling between the two displacement movements takes place via a pulling element, in the embodiment shown via a nylon strip 5 which is elastic in the transverse direction.
  • This elastic band 5 is fixed to the front end of the first rail element 1 in the pull-out direction 7 with the aid of a rivet 6 .
  • the strap 5 is also fixed with a rivet 8 at the rear end of the third rail element 3 in the pull-out direction 7 .
  • the band 5 is now additionally guided around two guide elements in the form of a first pin 10 and a second pin 9 which are provided in a stationary manner on the second rail element 2 .
  • the first pin 10 forms a first guide element and the second pin 9 forms a second guide element. If the second rail element 2 is now moved in the extension direction 7 relative to the first rail element 1, the first pin 10 presses the strap 5 in the extension direction 7 and thus exerts a tensile force on the strap 5 and the rivet 8 on the third rail element 3. so that the third rail element 3 is also displaced in the pull-out direction 7 in relation to the second rail element 2 .
  • the first pin 10 acts like a loose roller, with the “loose end” of the strap 5 pulling the third rail element 3 in the extension direction 7 . If the direction of movement is reversed, this consideration applies to the second pin 9.
  • the middle rail 2 can be moved in and against the pull-out direction 7 with respect to the first rail element 1 by means of a spindle drive 13 driven by a motor.
  • the threaded spindle of the spindle drive 13 is mounted on the first rail element 1 and engages in a spindle nut fixed on the second rail element 2, so that when the spindle rotates, the second rail element slides relative to the first rail element.
  • the spindle nut is fixed to the second rail element in and counter to the pull-out direction 7, but floating in the transverse direction perpendicular to the pull-out direction 7, i.e. with play, in order to be able to accommodate tolerances in the transverse direction.
  • the spindle in turn is coupled to an electric motor 14 so that the extension and retraction movement of the telescopic rail 4 is motor-driven.
  • a nylon band can be seen as the pulling element 5, which is fixed at the points designated by the reference numerals 15 and 16 on the first 1 and third 3 rail element. If the spindle drive 13 now moves the second rail element 2 in the extension direction 7, this displacement movement leads to a train on the belt 5, so that the third rail element 3 is also displaced relative to the second rail element 2 in the extension direction.
  • FIGS. 6 to 13 show various aspects of a further embodiment of the telescopic rail 4.
  • This telescopic rail 4 also consists of a first stationary rail element 1, a second, central rail element 2 and a third rail element 3.
  • the three rail elements 1, 2, 3 form a full extension.
  • an extension or retraction movement of the second rail element 2 relative to the first rail element 1 is driven with the aid of a spindle drive 13.
  • the spindle drive 13 comprises a threaded spindle 19, a spindle nut 20 and a Electric motor 14 includes.
  • the extension and retraction movement of the third rail element 3 synchronized with the extension and retraction movement of the second rail element 2 relative to the first rail element 1 takes place, as in the previously described embodiments, with the aid of a belt 5 as a pulling element.
  • To guide the tape 5 also includes the embodiment of the telescopic rail 4 from Figures 6-13 two guide elements 17, 18.
  • the first guide element 17 is in the Figures 7-9 shown enlarged. As in the Figures 7 and 8 As can be seen, the first guide element 17 has two first deflection surfaces 21, 22. In this way, two pulling elements can be guided with the first guide element in order to adapt the telescopic rail 4 to different load cases.
  • only one band 5 is attached to the two guide elements 17, 18 for synchronizing the pull-out or Collection movement of the third rail element 3 was added.
  • Each of the deflection surfaces 21, 22 causes the belt 5 to be deflected by 180°, 180° being the angle of wrap of the belt.
  • the deflection surfaces 21, 22 each have two recesses 25, 26. These recesses 25, 26 reduce the contact surface of the band 5 on the respective deflection surface 21, 22, so that the friction between the band 5 and the respective deflection surface 22 is reduced.
  • the recesses 25, 26 shown each extend over an angular range of less than 90°.
  • the recesses 25, 26 can also provide a latching function, as is shown schematically in figure 14 is shown.
  • the pulling element 5 has a latching projection 27 on its inner surface 28 .
  • This latching projection engages in one of the recesses 25, 26 when it reaches it and positions the strap 5 and thus the extension movement of the third rail element 3 relative to the second rail element 2 at a position predetermined by the position of the latching projection 27 on the strap 5.
  • the second guide element 18 is designed in accordance with the first guide element 17 .
  • the second guide element 18 also has two deflection surfaces 21, 22, which also cause a deflection of the tension member 5 by 180 °. This is from the sectional view of the figure 10 to recognize.
  • the second guide element 18 is designed in two parts.
  • the guide element 18 comprises a holding section 29 and a deflection section.
  • the holding section 29 is connected in a stationary manner to the second rail element 2, while the deflection section 30 is mounted on the holding section 29 so that it can be displaced in the pull-out direction.
  • the deflection section 30 carries the deflection surfaces 21, 22.
  • a spiral spring 31 as a spring element within the meaning of the present application prestresses the deflection section 30 in the extension direction 7 in a resilient manner. In this way, the tension member 5 is held taut by the spring 31 under tension. This reduces the play of the pulling element 5 in relation to the three rail elements 1, 2, 3 and thus reduces the play of the extension movements of the rail elements relative to one another.
  • the movement of the deflection section 30 under pretension is limited by a stop surface 32 on the holding section 29, the deflection section 30 having a hook 33 which is designed in such a way that it engages with the stop surface 32 and strikes there.
  • the combination of stop surface 32 and hook 33 is also used for easy assembly of the deflection section on the holding section.
  • the deflection section 30 is pushed onto the holding section 29 and latches as soon as the axial position of the hook 33 has passed the stop surfaces 32 .
  • a rolling element cage 34 in the form of a strip ball cage 34 is provided between two rail elements 1, 2, 3 in each case.
  • the first guide element 17 also forms a stop for two strip ball cages 34 which are arranged between the second rail element 2 and the third rail element 3 .
  • the first guide element 17 is also used to mount the spindle nut 20 on the second rail element 2. This reduces the number of necessary components and connections to the second rail element 2.
  • the spindle nut 20 has an internal thread 38 which engages with the threaded spindle 19.
  • the spindle nut 20 is accommodated in the first guide element 17 in such a way that it is fixed in and counter to the pull-out direction in such a way that a rotational movement of the threaded spindle 19, which is stationarily mounted on the first rail element, results in a linear movement of the spindle nut 20 and thus of the second rail element 2 in relation to the first rail element 1 leads.
  • the spindle nut 20 is mounted floating on the first guide element 17 in all directions perpendicular to the pull-out direction 7 . So hitting the threaded spindle 19 is compensated for against the rail elements and does not lead to vibration of the Rail elements 1, 2, 3.
  • figure 12 shows the mounting of the threaded spindle 20 in the first guide element 17 in a cross-sectional view. Viewed in this view, the spindle nut 20 is mounted in a floating manner both in a vertical direction 36 and in a transverse direction 37 .
  • the spindle nut 20 is also designed in such a way that it has torque supports in the form of projections 39 on two sides. These direct the torques, which are transmitted from the threaded spindle 19 to the spindle nut 20 , into the first guide element 17 . Thus, the torques do not have to be transmitted exclusively via the side surfaces 40 of the spindle nut.
  • the rail can therefore also be used for higher load cases.
  • the projections 39 not only serve to form torque supports, but also provide an unambiguous assembly orientation, which prevents the spindle nut 20 from being assembled incorrectly.
  • the threaded spindle 19 is guided through the first guide element 17 through a spindle receiving bore 41 in order to engage with the spindle nut 20 .
  • the spindle mounting hole 41 is dimensioned such that the play of the threaded spindle 19 in the spindle mounting hole 41 is smaller than the play of the spindle nut 20 in the vertical direction 36 and the transverse direction 37.
  • figure 10 shows the mounting of the end of the threaded spindle 19 on the motor side on the first rail element 1. This mounting takes place in the axial direction, i.e. in the direction of the extension direction, with the aid of a bracket 42 bent off the back of the rail 42 of the first rail element 1, with a hollow cylindrical bearing bush in this bracket 42 43 is added to guide the spindle 19.
  • figure 13 1 shows that the guide element 17 has a clearance 44 which enables the third rail element 3 to be fitted to the second rail element 2 already equipped with the guide elements, without the third rail element 3 colliding with the guide element 17 .
  • Figures 15a and 15b show a two-part configuration of a band-shaped pulling element 5, the two pulling element sections 44, 45 being connected to one another at both of their ends.
  • a fastening element 46 with two hooks 47 serves as a connector for the ends.
  • the fastener 46 also has a bore through which a rivet is driven in order to connect the fastening element 46 to the first rail element 1 or the third rail element 3 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
EP20178409.7A 2020-06-05 2020-06-05 Teleskopschiene Active EP3919770B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20178409.7A EP3919770B1 (de) 2020-06-05 2020-06-05 Teleskopschiene
PCT/EP2021/063953 WO2021244907A1 (de) 2020-06-05 2021-05-26 Teleskopschiene
CN202180038781.1A CN115698530A (zh) 2020-06-05 2021-05-26 伸缩导轨
US17/919,610 US20230337820A1 (en) 2020-06-05 2021-06-05 Telescopic rail

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20178409.7A EP3919770B1 (de) 2020-06-05 2020-06-05 Teleskopschiene

Publications (2)

Publication Number Publication Date
EP3919770A1 EP3919770A1 (de) 2021-12-08
EP3919770B1 true EP3919770B1 (de) 2022-09-14

Family

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Application Number Title Priority Date Filing Date
EP20178409.7A Active EP3919770B1 (de) 2020-06-05 2020-06-05 Teleskopschiene

Country Status (4)

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US (1) US20230337820A1 (zh)
EP (1) EP3919770B1 (zh)
CN (1) CN115698530A (zh)
WO (1) WO2021244907A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4274044A1 (de) * 2022-05-02 2023-11-08 Accuride International GmbH Lineares führungssystem

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267043A (en) * 1939-12-22 1941-12-23 Owen D Premo Pulley slide
DE20308256U1 (de) * 2003-05-23 2004-05-19 Dewert Antriebs- Und Systemtechnik Gmbh & Co Kg Möbelantrieb
AT505562B1 (de) * 2007-07-24 2013-04-15 Blum Gmbh Julius Möbelantrieb
DE112009001940B4 (de) * 2008-08-07 2020-12-31 Accuride International Inc. Synchronisierungs-/Stabilisierungssystem und selbstbewegender Mechanismus für Schubladenanwendungen
KR102010339B1 (ko) * 2018-03-14 2019-08-13 (주)세고스 액추에이터
CN108916226B (zh) * 2018-08-24 2023-08-18 无锡海达尔精密滑轨股份有限公司 三节式同步滑轨
CN112956846A (zh) * 2021-03-16 2021-06-15 合肥美的电冰箱有限公司 直线运动机构、抽屉组件和储物柜

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Publication number Publication date
CN115698530A (zh) 2023-02-03
WO2021244907A1 (de) 2021-12-09
US20230337820A1 (en) 2023-10-26
EP3919770A1 (de) 2021-12-08

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