EP3568264B1 - Dispositif de serrage destiné à serrer un ressort hélicoïdale - Google Patents

Dispositif de serrage destiné à serrer un ressort hélicoïdale Download PDF

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Publication number
EP3568264B1
EP3568264B1 EP18701674.6A EP18701674A EP3568264B1 EP 3568264 B1 EP3568264 B1 EP 3568264B1 EP 18701674 A EP18701674 A EP 18701674A EP 3568264 B1 EP3568264 B1 EP 3568264B1
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EP
European Patent Office
Prior art keywords
gear
bevel gear
main shaft
drive
gear element
Prior art date
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EP18701674.6A
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German (de)
English (en)
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EP3568264A1 (fr
Inventor
Andreas Heiko GRUNER
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Individual
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Priority to HRP20201807TT priority Critical patent/HRP20201807T1/hr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/10—Counterbalance devices
    • E05D13/12—Counterbalance devices with springs
    • E05D13/1253—Counterbalance devices with springs with canted-coil torsion springs
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/10—Counterbalance devices
    • E05D13/12—Counterbalance devices with springs
    • E05D13/1253—Counterbalance devices with springs with canted-coil torsion springs
    • E05D13/1261—Counterbalance devices with springs with canted-coil torsion springs specially adapted for overhead wings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/499—Spring tensioners; Tension sensors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/60—Suspension or transmission members; Accessories therefor
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/71—Toothed gearing
    • E05Y2201/716—Pinions
    • E05Y2201/718—Bevelled pinions

Definitions

  • the present invention relates to a tensioning device for tensioning a helical spring, which acts as a torsion or torsion spring, the two ends of which are rotated relative to one another for tensioning the spring, so that the spring has a changed axial length in a tensioned state compared to its relaxed state.
  • Helical springs tensioned in this way are used, for example, to drive sectional doors.
  • Sectional doors consist of several door sections that are foldably connected to one another and each have one or more rollers guided in running rails at the front.
  • a drive shaft which is connected to a drive, usually an electric motor, is used to raise and lower the sectional door.
  • Helical springs are attached to the drive shaft. The spring force of the coil springs counteracts the dead weight of the gate in order to support the rotation of the drive shaft and to relieve the electrical drive.
  • the coil spring is firmly mounted on the drive shaft.
  • the helical spring is tensioned during assembly by applying a torque to the end of the helical spring that is not non-rotatably attached so that the spring can be tensioned and the spring is attached to the drive shaft in the tensioned state. Due to the large forces or moments required, a supporting device for tensioning the spring is necessary.
  • a strut tensioner for replacing a spring or a shock absorber of a strut of a motor vehicle.
  • the spring tension is realized by two horseshoe-shaped spring holders of the spring strut clamp, which are arranged eccentrically to the spring and which move towards one another by actuating a spindle arranged on the spring strut clamp. This reduces the axial misalignment that each individual wire circumference has at both ends, which leads to tension on the spring.
  • the DE 10 2013 101 083 A1 is concerned with an auxiliary tool for assembling a shock absorber that comprises a holding assembly and a drive assembly.
  • the auxiliary tool has a thread feed and is arranged coaxially to the spring to be tensioned. With the help of a rotating element, the auxiliary tool is rotated manually around the axis of rotation. The spring is relaxed or relaxed by changing the axial offset of the wire circumference.
  • the DE 20 2012 005 626 U1 describes a pressure plate for a spring tensioner, which is used to tension a coil spring of a spring damper strut, which is received between a lower and an upper spring plate.
  • the pressure plate is attached to the upper spring plate for the axial support of holding elements, wherein the holding elements can be brought into engagement with the spring turns of the helical springs.
  • the DE 20 2011 050 354 U1 relates to a clamping plate for a spring compressor as well as a spring compressor for the assembly and disassembly of helical compression springs, in particular on spring-loaded chassis.
  • the clamping plate has a contact surface Receiving a spring segment, via which a compression force can be applied to the chassis spring in the axial direction.
  • the US 7,909,305 B2 describes a strut removal device. It comprises two compression plates which are designed in such a way that they have a fastening region with which they are connected to a driving threaded section. Furthermore, each compression plate has a device which is designed to engage in a respective first coil of a helical spring. The device can be driven with a manually generated torque.
  • the tensioning devices described above generate a force that acts axially on the spring without any torque acting on the spring to be tensioned.
  • the DE 10 2012 104 673 B3 relates to a tool, system and method for screwing, as a rule, two helical compression springs into a single helical disc spring. Handles are designed on the tool used for this purpose, which are used to operate the tool.
  • the U.S. 3,651,719 teaches a torsion spring adjustment tool for overhead doors. It can be used to vary the tension of torsion springs.
  • the tool has a split clamping device and is engageable with the adjustable sleeve anchor. For this purpose, rounded teeth are formed at a circumferential distance.
  • handle sections are designed for manual operation on the tool.
  • the U.S. 3,921,761 A describes a method and an apparatus for winding torsion springs.
  • the device comprises a torsion spring which is fastened at a first end to a support means. A second end of the torsion spring is rotatable relative to the first end.
  • the device comprises a gear and a rotatable worm gear, the gear having at least one gear part rotatable by the worm gear.
  • the worm gear is connected to a stationary component via a support plate, which is movable relative to the gear part and holds the worm gear in position.
  • the device also has a drive element in the form of a cordless screwdriver or an electric motor.
  • One object of the present invention is to make the tensioning of coil springs less muscle-intensive and less dangerous shape.
  • possible damage z. B. the gate can be prevented when tensioning the spring.
  • the tensioning device is used to tension a helical spring which is mounted on a main shaft. At one end, the helical spring is firmly connected to a frame or housing part in which a bearing block is located.
  • the clamping device comprises a gear drive.
  • the toothed drive comprises a first gear element and a second gear element.
  • the first gear element is guided axially displaceably on the main shaft and connected to a free end of the helical spring in a rotationally fixed manner.
  • the second gear element is in driving engagement with the first gear element; H. the second gear element drives the first gear element and sets it in rotation around the main shaft. Due to the non-rotatable connection of the helical spring at its fixed end to the frame, the helical spring is tensioned or relaxed when a torque is introduced via the end connected to the first gear element.
  • the clamping device further comprises a holding element.
  • the holding element holds the second gear element in the position of driving engagement with the first gear element during the tensioning process.
  • the tensioning device further comprises a drive element.
  • the drive element is preferably on the second gear element releasably coupled in order to set it in rotation for the clamping process.
  • the advantages of the invention can be seen in particular in the fact that the clamping device can be operated by a single person for clamping and less force has to be applied by the person. This increases the safety when preloading large coil springs and it becomes cheaper, faster and easier to install the coil springs with the required preload.
  • the gear drive of the inventive clamping device is designed as a bevel gear.
  • the first gear element is thus formed as a bevel gear and the second gear element is formed as a bevel pinion.
  • the axis of rotation of the first gear element and the second gear element run perpendicular to one another.
  • the axis of rotation of the main shaft is preferably arranged coaxially to the axis of rotation of the first gear element.
  • a guide pin for the axially central mounting of the bevel pinion is arranged perpendicular to this.
  • the bevel gear has a central opening which is used to lead through the main shaft.
  • a central opening of the bevel pinion serves to receive a guide pin and can be formed by a through opening.
  • a drive shaft one end of which is designed as a guide pin, can be arranged in the axial through opening of the bevel pinion.
  • the bevel gear is connected to a guide bush.
  • the guide bushing is guided axially displaceably on the main shaft, so that the guide bushing together with the bevel gear is axially displaceable on the main shaft.
  • On their outer circumference the guide bush has a guide groove.
  • the guide pin of the bevel pinion is mounted in the guide groove.
  • the bevel gear is integrally connected to the guide bush. On its side facing away from the guide bush axially, the bevel gear has a cylindrical receiving section. The free end of the helical spring is fastened in a torque-proof manner on this receiving section.
  • the helical spring is attached to the receiving section, for example by welding or riveting. In a further embodiment, the helical spring can be detachably fastened to the receiving section, for example by screwing it.
  • the rotationally fixed connection of the helical spring to the receiving section transmits a torque acting on the bevel gear to the helical spring. Depending on the direction of rotation and the starting position of the helical spring, the applied torque tensions the helical spring or relaxes it.
  • the change in the axial expansion of the spring that occurs in the process results in the position of the free end of the helical spring shifting along the main shaft between a tensioned and a relaxed end position.
  • the bevel gear which is connected to the helical spring, also moves between these two end positions on the main shaft. Since the bevel gear is in drive engagement with the bevel pinion for tensioning or releasing the helical spring, it is necessary that the bevel pinion engages well on the bevel gear and is moved along with it.
  • the clamping device has the holding element.
  • the holding element preferably comprises a bracket and a pressure plate connected to the bracket.
  • the bracket can be attached to encompass the guide bushing and the bevel pinion.
  • the pressure plate is preferably positioned to exert a holding force in the axial direction on a side facing away from the guide bushing Imprint the bottom surface of the bevel pinion arranged perpendicular to its axis of rotation.
  • the guide pin on which the bevel pinion is mounted is pressed into the guide groove of the guide bushing of the bevel gear.
  • the bevel gear remains in mesh with the bevel pinion while the helical spring is tensioned or released.
  • first counterpart between the bracket and the guide bush.
  • a second counterpart can be placed between the pressure plate and the bottom surface of the bevel pinion.
  • the counterparts support a uniform introduction of the holding force by the holding element in that they form sufficiently large contact areas between the holding element and between the gear elements through sufficiently large contact surfaces.
  • the counterparts preferably have a shape that is adapted to the geometry of the holding element and the geometry of the gear elements and are made of durable materials with regard to the forces acting.
  • the drive element is designed as an electric motor.
  • the second gear element i.e. the bevel pinion, is attached to a motor axis of the electric motor.
  • the end of the motor axis on which the second gear element is arranged is designed as a guide pin for mounting the bevel pinion.
  • a hand drill or a cordless screwdriver can be used as the drive element.
  • a preferred embodiment of the clamping device is characterized in that it also has locking elements.
  • the first gear member can be fixed in a rotationally fixed manner on the main shaft.
  • a locking element can for example be a wedge, pin, screw, bolt or the like.
  • a groove is arranged in the main shaft and, corresponding thereto, at least one through opening in the first transmission element.
  • Each of the through openings preferably extends radially circumferentially in sections along the outer circumference, in the area of the guide bushing of the bevel gear, in the cylindrical receiving section of the bevel gear or on the bevel gear itself.
  • the second gear element is detachably attached to the first gear element so that the drive engagement can be canceled.
  • the bracket and the pressure plate that is to say the holding element, are preferably detachably attached to the clamping device.
  • the retaining force impressed on the bottom surface of the bevel pinion is no longer applicable.
  • the guide pin of the second gear element is released from the guide groove of the first gear element, so that the second gear element can be removed.
  • the bracket is detachably connected to the pressure plate, for example by screws.
  • Fig. 1 shows a side view of a tensioning device 01 according to the invention for tensioning a helical spring 02, which is guided on a main shaft 03.
  • the area in which the helical spring 02 is non-rotatably connected to a housing part or a frame (not shown) is not shown.
  • the tensioning device comprises a toothed drive which is formed by a first gear element 06 and a second gear element 07, the first gear element 06 being designed as a bevel gear and the second gear element 07 being designed as a bevel pinion.
  • the axis of rotation of the bevel gear 06 runs perpendicular to the axis of rotation of the bevel pinion 07.
  • the bevel gear 06 is guided axially displaceably on the main shaft 03.
  • the bevel gear 06 has a first axial through opening 09 through which the main shaft 03 runs.
  • the bevel gear 06 is connected to a guide bush 10 on its side facing away from the helical spring 02.
  • the guide bushing 10 is preferably formed in one piece on the bevel gear and has a guide groove 11.
  • the guide groove 11 is designed to run radially around it.
  • the side of the bevel gear 06 facing the helical spring has a cylindrical receiving section 12. The through opening 09 continues both in the guide bushing 10 and in the receiving section 12.
  • An end of the helical spring 02 that is rotatable with respect to the main shaft 03 during the tensioning process is fastened to the receiving section 12, so that when the first gear element 06 rotates, a torque is transmitted to the helical spring 02. Depending on the direction of rotation of the first gear element 06, the impression of the torque leads to the tension or relaxation of the helical spring.
  • the bevel pinion 07 has a second axial through opening 14.
  • the second through opening 14 serves to receive a drive shaft 15, which is designed to be connectable at one end to an electrical drive (not shown) and whose free end is designed as a guide pin 16.
  • the drive shaft 15 is rotatably connected to the bevel pinion 07 and transmits a torque from the electric drive to the bevel pinion 07.
  • the guide pin 16 of the bevel pinion 07 is arranged in the guide groove 11 to guide the bevel pinion 07 in engagement with the bevel gear 06.
  • the bevel pinion, drive shaft and guide pin can alternatively also be designed in one piece.
  • Fig. 1 further shows a first counterpart 17, which is placed against the guide bushing 10 and has an inwardly directed section which engages in the guide groove 11.
  • the contact surfaces of the counterpart 17 are sufficiently large to allow sufficiently large contact areas between a holding element 19 ( Fig. 2 ) and the guide bush 10 to form.
  • Fig. 2 shows a front view of the clamping device 01 with the holding element 19.
  • the holding element 19 comprises a bracket 20 and a pressure plate 21.
  • the bracket 20 encompasses the guide bushing 10 and the bevel pinion 07.
  • the pressure plate 21 is on the bottom surface of the bevel pinion 07 is arranged.
  • the bracket 20 and the pressure plate 21 are preferably detachably attached in order to release the bevel pinion 07. Because of the holding element 19, the bevel gear 06 remains in drive engagement with the bevel pinion 07, in particular when the bevel gear 06 changes its position along the main shaft 03 between a tensioned and relaxed position.
  • the drive engagement between the bevel gear 06 and the bevel pinion 07 can be canceled as soon as the holding element 19 is released and thus no holding force acts on the bevel pinion 07 and the guide bushing 10 of the bevel gear 06.
  • the releasable connection can be formed, for example, by screws.
  • Fig.2 also shows the drive shaft 15, which runs through the second through opening 14 of the bevel pinion 07 and is guided in the guide groove 11. At the end of the drive shaft 15 that is arranged in the guide groove 11, the drive shaft 15 is designed as a guide pin 16.
  • a second counterpart 23 is arranged.
  • the two counterparts 17, 23 are axially spaced apart with respect to the drive shaft 15, arranged opposite one another, the second counterpart 23 being arranged between the bottom surface of the bevel pinion 07 and the pressure plate 21 of the holding element 19.
  • the contact surfaces of the second counterpart 23 are made sufficiently large in order to form sufficiently large contact areas between the holding element 19, in particular the pressure plate 21, and the bottom surface of the bevel pinion 07.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Claims (6)

  1. Dispositif de tension (01), destiné à mettre en tension un ressort hélicoïdal (02), lequel est logé sur un arbre principal (03) et par une extrémité fixe est assemblé de manière solidaire en rotation avec un cadre ou une partie de boîtier, le dispositif de tension (01) comprenant :
    - un engrenage, pourvu d'un premier élément de transmission (06), lequel est guidé en étant déplaçable en direction axiale sur l'arbre principal (03) et est assemblé de manière solidaire en rotation avec une extrémité libre du ressort hélicoïdal (02), et pourvu d'un deuxième élément de transmission (07), lequel se trouve en engagement d'entraînement avec le premier élément de transmission (06), pour amener le premier élément de transmission (06) en une rotation autour de l'arbre principal (03) ;
    - un élément de retenue (19), lequel retient le deuxième élément de transmission (07) dans la position de l'engagement en entraînement avec le premier élément de transmission (06) ;
    - un élément d'entraînement, lequel est accouplé sur le deuxième élément de transmission (07) pour amener celui-ci en rotation ;
    caractérisé en ce que
    - l'engrenage est conçu sous la forme d'un engrenage conique, le premier élément de transmission (06) étant conçu sous la forme d'une roue conique (06) et le deuxième élément de transmission (07) étant conçu sous la forme d'un pignon conique (07), et les axes de rotation des deux éléments de transmission (06, 07) s'écoulant à la perpendiculaire l'un de l'autre ;
    - la roue conique (06) est assemblée en monobloc avec une douille de guidage (10), laquelle est guidée de manière déplaçable en direction axiale sur l'arbre principal (03) et sur sa périphérie extérieure comporte une rainure de guidage (11) dans laquelle est logé un tenon de guidage (16) du pignon conique (07) centré par rapport à l'axe, le tenon de guidage (16) étant assemblé de manière solidaire en rotation avec le pignon conique (07) ;
    - la roue conique (06) détient un orifice (09) central à travers lequel l'arbre principal (03) s'écoule, et sur le côté axialement opposé à la douille de guidage (10), détient un segment de logement (12) cylindrique, dans lequel est fixée l'extrémité libre du ressort hélicoïdal (02).
  2. Dispositif de tension (01) selon la revendication 1, caractérisé en ce que l'élément de retenue (19) comprend un étrier (20) et une plaque de pression (21) assemblée avec celui-ci, l'étrier (20) entourant la douille de guidage (10) et le pignon conique (07), et la plaque de pression (21) étant positionnée pour imprimer dans la direction axiale une force de retenue sur la surface de fond inférieur du pignon conique (07), de sorte que le tenon de guidage (16) soit pressé dans la rainure de guidage (11).
  3. Dispositif de tension (01) selon la revendication 1 ou 2, caractérisé en ce que l'élément d'entraînement est formé d'un moteur électrique sur l'axe de moteur duquel est monté le deuxième élément de transmission (07) .
  4. Dispositif de tension (01) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que qu'il comprend par ailleurs un élément de blocage, à l'aide duquel le premier élément de transmission (06) peut être bloqué de manière solidaire en rotation sur l'arbre principal (03).
  5. Dispositif de tension (01) selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le deuxième élément de transmission (07) est monté de manière amovible, de telle sorte que l'engagement en entraînement puisse être annulé.
  6. Dispositif de tension (01) selon la revendication 5, dans la mesure où elle se rapporte à la revendication 2, caractérisé en ce que l'étrier (20) et la plaque de pression (21) sont montés de manière amovible, pour libérer le deuxième élément de transmission (07).
EP18701674.6A 2017-01-13 2018-01-10 Dispositif de serrage destiné à serrer un ressort hélicoïdale Active EP3568264B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HRP20201807TT HRP20201807T1 (hr) 2017-01-13 2020-11-12 Zatezni uređaj za zatezanje zavojne opruge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017100581.1A DE102017100581A1 (de) 2017-01-13 2017-01-13 Spannvorrichtung zum Spannen einer Schraubenfeder
PCT/EP2018/050521 WO2018130548A1 (fr) 2017-01-13 2018-01-10 Dispositif de serrage destiné à serrer un ressort hélicoïdale

Publications (2)

Publication Number Publication Date
EP3568264A1 EP3568264A1 (fr) 2019-11-20
EP3568264B1 true EP3568264B1 (fr) 2020-08-12

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ID=61054342

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Application Number Title Priority Date Filing Date
EP18701674.6A Active EP3568264B1 (fr) 2017-01-13 2018-01-10 Dispositif de serrage destiné à serrer un ressort hélicoïdale

Country Status (6)

Country Link
US (1) US11148267B2 (fr)
EP (1) EP3568264B1 (fr)
JP (1) JP2020505245A (fr)
DE (1) DE102017100581A1 (fr)
HR (1) HRP20201807T1 (fr)
WO (1) WO2018130548A1 (fr)

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DE102017100581A1 (de) * 2017-01-13 2018-07-19 Andreas Heiko Gruner Spannvorrichtung zum Spannen einer Schraubenfeder
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Also Published As

Publication number Publication date
DE102017100581A1 (de) 2018-07-19
WO2018130548A1 (fr) 2018-07-19
HRP20201807T1 (hr) 2021-01-22
US11148267B2 (en) 2021-10-19
US20190358797A1 (en) 2019-11-28
JP2020505245A (ja) 2020-02-20
EP3568264A1 (fr) 2019-11-20

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