WO1993008414A1 - Amortisseur de vibrations - Google Patents

Amortisseur de vibrations Download PDF

Info

Publication number
WO1993008414A1
WO1993008414A1 PCT/SE1992/000728 SE9200728W WO9308414A1 WO 1993008414 A1 WO1993008414 A1 WO 1993008414A1 SE 9200728 W SE9200728 W SE 9200728W WO 9308414 A1 WO9308414 A1 WO 9308414A1
Authority
WO
WIPO (PCT)
Prior art keywords
fastening arrangement
oscillating body
fastening
shape
damper
Prior art date
Application number
PCT/SE1992/000728
Other languages
English (en)
Inventor
Urban Johannesson
Original Assignee
Forsheda 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 Forsheda Ab filed Critical Forsheda Ab
Publication of WO1993008414A1 publication Critical patent/WO1993008414A1/fr

Links

Classifications

    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
    • F16F7/108—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted on plastics springs

Definitions

  • the present invention relates to a vibration damper for damping vibrations on a surface of an object, said damper comprising at least one oscillating body, which is movably connected to said surface so that the oscillating body is made to vibrate such that it transfers forces to the bject, which forces are substantially opposed to the forces which act on the body due to the vibrations, whereby the damper presents a fastening arrangement made • from a shape-permanent material and intended to be fixedly attached at the surface of the object.
  • the object of the present invention is to arrive at a vibration damper which involves a further development of known technology in such a way that an effective damping can be achieved in situations where the vibrations vary to a high degree.
  • a vibration damper characterized by the combination of the damper presenting elastic suspension means, which are fixedly connected both to the oscillating body and to the fastening arrangement, in addition to which the suspension means are fastened to the fastening arrangement at attachment locations, on which the fastening arrangement is divided so that parts of at least two fastening portions, for each attachment location, form a shape lock or friction lock for each suspension means, and by the oscillating body consisting of a weight and of a damping body formed from a highly elastic material which substantially encloses the oscillating body and damps its movements by means of abutment against walls in the fastening arrangement, and by the fastening arrangement being formed as a housing with one at least partly closed compartment in which the oscillating body is suspended and arranged to vibrate.
  • Fig. 1 shows a central cross-section of the vibration damper of •• the invention according to a first embodiment
  • Fig. 2 shows a central cross-section through a vibration damper according to a second embodiment
  • Fig. 3 shows a central cross-section through the vibration damper according to a third embodiment.
  • the vibration damper consists of two main portions, namely a fastening arrangement 1 and an oscillating body 2, said oscillating body being arranged to be supported by elastic suspension of the fastening arrangement so that the oscillating body is made to vibrate in opposite phase with respect to the vibration forces acting on the fastening arrangement 1 when this is mounted on a surface 3 of an object 4 of which the vibrations should be stopped.
  • the fastening arrangement 1 has the form of a housing which encloses a compartment 5 in which the oscillating body 2 is enclosed.
  • the housing can be completely closed, in which case it is provided with four enclosing sides 6, 7 and an upper part 8, or alternatively open with only two opposed sides, whereby the compartment 5 has the form of a tunnel with openings in two directions.
  • a central cross- section through the arrangement is depicted which is the same independently of whether a closed or open solution is chosen.
  • the oscillating body 2 presents partly a weight 9 which, in the shown example, is made as a solid ball of suitable metal, and partly a damping body 10, which encloses the weight 9 and which is made from a shock absorbing material having high elasticity, such as rubber, for example silicon rubber.
  • the damping body is, in the shown example, cubic with six planar sides 11, 12, 13, 14, i.e. in the same shape as the compartment 5.
  • the damping body 10 should have walls which are thick enough such that the material does not "bottom-out" without a shock-free damping being achieved. In the shown example the thickness of the walls at the minimum point is the same order of magnitude as the intermediate space to the walls 29-31.
  • suspension elements 15 which are similarly made in a highly elastic material and which for example are produced as a unit with the damping body and thus form projections from its sides.
  • the suspension elements 15 are positioned in the plane of the cross- section, but they can for example be made from two elements 15 on either side of the oscillating body, positioned symmetrically with respect to the plane of the central cross-section. In this way the oscillating body 2 is stably suspended with a reduced risk of the oscillating body rotating around its suspension location if only two suspension locations are provided.
  • the fastening arrangement 1, according to the invention, is divided into two or more portions 16, 17, which are arranged such that they jointly form a connected unit. According to the invention, the separation is so arranged that the fastening portions 16, 17 together form each attachment location for the oscillating body's suspension element 15. To this end, both fastening portions 16, 17, at the attachment locations, are provided with parts 19, 20 which cooperate with one attachment end 21 of each suspension element such that this is locked to the fastening arrangement, i.e. such that the suspension element provides a fixed, i.e. locked, attachment.
  • the attachment is made in the form of a shape lock, in that said parts of the fastening portions are made with surfaces which together correspond to the shape of the suspension element's attachment end 21, at least in the compressed state.
  • the hollow chamber formed by said surfaces 19, 20 has somewhat smaller dimensions than the outer contour of the suspension elements in order to ensure the good attachment via fixed clamping of the attachment ends 21. In principle this is in fact not necessary in the case, as shown in the figures, where the attachment ends are an enlarged part and where said hollow chamber equally presents an enlarged part 22 positioned inside a neck portion 23 of the hollow chamber, whereby the suspension element is shape-locked into the fastening arrangement.
  • This hollow chamber is thus divided up by a separation line 24 between both of the fastening portions 16, 17 which are maintained fixedly connected to each other.
  • both the fastening portions 16, 17 present flanges 25, 26 which have interconnecting shapes and which are foreseen with screw holes and screws 27 passing therethrough for attachment to the surface 3 of an object 4 of which the vibrations should be cancelled.
  • the object is thus provided with preferably threaded screw holes for attachment of the damper in a fixed manner such that the fastening arrangement 1 vibrates together with the object 4, i.e. it accompanies its movements.
  • the damper in the unmounted state is open in at least one direction, in the shown example this direction being downwards so that a part of the object's surface 3 forms a wall 28 in the compartment 5 which, in the rest position of the damper, is located at a distance from the one side 14 of the oscillating body 2.
  • the remaining sides 29, 30, 31 extend, in the rest position, at a distance from the oscillating body's corresponding sides 11, 12, 13, whereby all the sides of the compartment 5 form right angles with each other and are substantially planar and arranged to follow the vibration movements of the object 4.
  • the division of the fastening arrangement 1 at the fixing location allows a simple mounting of the oscillating body 2 with the fastening portions 16, 17 separated from each other, whereby the hollow at the attachment location is open so that the suspension elements 15 can easily be placed in their respective hollows, whereafter the fastening portions are brought together and the hollows closed, thereby fixedly locking the suspension elements.
  • the oscillating body 2 presents two supporting legs 32 made from an elastic material, for instance of the same material as the damping body 10.
  • the supporting legs 32 serve as damping elements against the surface 28 in order to influence the damping 10 characteristics.
  • the suspension elements 15 can even be pre-stressed i.e. they are stretched during mounting and fixedly locked in their stretched condition, whereby the damping effect is increased. 15
  • FIG. 2 represents a modification of the fastening arrangement 1 such that the fastening portions, here denoted by reference numerals 33 and 34, have a different configuration, mainly as regard
  • the flange 35 of the fastening portion is here directly in contact with the surface 3 of the object 4, whilst the attachment portion 34 presents a bottom part 36 which constitutes the entire damper without any surface of the object being used other
  • Fig. 3 shows an embodiment of a damper with suspension elements 15 situated at different heights on respective sides of the oscillating body 2. This requires a
  • damping can be achieved inside a wide frequency range of vibration oscillations, where the damping occurs partly due to the oscillating body's 2 attachment in the fastening means and partly due to the damping body's 10 abutment against the fastening means surfaces in the compartment 5 in which the oscillating body is movable.
  • the vibrations with low amplitude preferably are resisted in that the suspension elements 15 are stretched as soon as the oscillating body is moved out of its neutral position as shown in the figures and applies force components to the attachment location which, due to the inertia of the oscillating body 2 at each instant, are opposed to the force components to which the fastening arrangement is subjected as a result of the vibrations.
  • the oscillating body 2 with the sides 11-14 of the damping body 10 is made to strike against the sides 28, 29, 30, 31, which additionally enhances the damping characteristics.
  • the support legs 32 according to Fig.l as an extra damping element the damping characteristics can be further influenced.
  • the fastening arrangement 1 and also the oscillating body can have different, alternative designs.
  • the fastening arrangement can be completely closed or can be for example, even in the mounted state, partly open.
  • the suspension elements can be arranged on more sides of the oscillating body 2 than just on the two shown sides.
  • the suspension elements can be arranged around,. i.e. on four sides, for example with at least one or two suspension elements on each side.
  • the suspension elements may even be coupled to the bottom part 36 and the upper part of the fastening arrangement.
  • the oscillating body as a whole is made as a weight provided with elastic suspension elements, but then the fastening arrangement's inwardly directed sides need to have elastic walls.
  • the fastening arrangement must however have a relatively stiff frame which transfers the vibrations from the object.
  • the attachment locations should thus have an anchoring which is sufficiently stiff such that they substantially follow the vibrational movements of the object or, more accurately stated, its attempt to produce vibrations.
  • An alternative design of the fastening arrangement and also the oscillating body is as a cylindrical or conical principal shape, where the suspension elements are preferably symmetrically spread over the outer surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

L'invention se rapporte à un amortisseur de vibrations, qui sert à amortir les vibrations à la surface (3) d'un objet (4). Cet amortisseur comprend au moins un bloc oscillant (2), qui est relié mobile à la surface de l'objet, pour que, lorsqu'il est amené à vibrer, le bloc oscillant puisse transférer à l'objet des forces qui soient essentiellement opposées aux forces agissant sur le bloc en raison des vibrations. Cet amortisseur comporte un dispositif de fixation (1), fabriqué à partir d'un matériau de forme stable et destiné à être attaché en position fixe à la surface de l'objet. Cet amortisseur de vibrations est pourvu d'organes de suspension élastiques (15), qui sont reliés fixes au bloc oscillant (2) ainsi qu'au dispositif de fixation (1). Les organes des suspension sont attachés au dispositif de fixation en des points d'attache par lesquels le dispositif de fixation est divisé, pour que les extrémités d'au moins deux parties de fixation (16, 17), pour chaque point de fixation, produisent un blocage de forme ou un blocage par friction de chacun des organes de suspension.
PCT/SE1992/000728 1991-10-17 1992-10-16 Amortisseur de vibrations WO1993008414A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9103020-5 1991-10-17
SE9103020A SE469239B (sv) 1991-10-17 1991-10-17 Vibrationsdaempare

Publications (1)

Publication Number Publication Date
WO1993008414A1 true WO1993008414A1 (fr) 1993-04-29

Family

ID=20384031

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1992/000728 WO1993008414A1 (fr) 1991-10-17 1992-10-16 Amortisseur de vibrations

Country Status (2)

Country Link
SE (1) SE469239B (fr)
WO (1) WO1993008414A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884731A2 (fr) * 1997-06-09 1998-12-16 Matsushita Electric Industrial Co., Ltd. Appareil d'enregistrement et de reproduction de disque et amortisseur dynamique approprié
US5890704A (en) * 1994-11-10 1999-04-06 Tokai Rubber Industries, Ltd. Fluid-filled elastic cylindrical mount using split outer sleeve with sealing members
FR2779500A1 (fr) * 1998-06-05 1999-12-10 Freudenberg Carl Amortisseur de vibrations
WO2002042661A1 (fr) * 2000-11-22 2002-05-30 Toyo Tire & Rubber Co., Ltd. Tige de raccordement
EP1132644A3 (fr) * 2000-03-01 2003-06-25 Tokai Rubber Industries, Ltd. Dispositif d'amortissement de vibrations pour véhicule
EP2011673A3 (fr) * 2007-07-04 2010-01-20 Tokai Rubber Industries, Ltd. Dispositif d'amortissement de vibrations et son procédé de fabrication
FR3023339A1 (fr) * 2014-07-04 2016-01-08 Peugeot Citroen Automobiles Sa Dispositif d'amortissement de vibrations affranchi des effets de la gravite, pour un vehicule
CN106133379A (zh) * 2014-04-02 2016-11-16 大众汽车有限公司 用于交通工具座椅的减振器、交通工具座椅和机动车

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649271A (en) * 1950-07-08 1953-08-18 United Carr Fastener Corp Mounting device
EP0039823A2 (fr) * 1980-05-09 1981-11-18 Nissan Motor Co., Ltd. Support de moteur pour sa suspension par rapport à la structure du véhicule
EP0300445A1 (fr) * 1987-07-20 1989-01-25 Nissan Motor Co., Ltd. Procédé de commande d'un amortisseur
WO1991000967A1 (fr) * 1989-07-11 1991-01-24 Forsheda Ab Dispositif d'amortissement de vibrations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649271A (en) * 1950-07-08 1953-08-18 United Carr Fastener Corp Mounting device
EP0039823A2 (fr) * 1980-05-09 1981-11-18 Nissan Motor Co., Ltd. Support de moteur pour sa suspension par rapport à la structure du véhicule
EP0300445A1 (fr) * 1987-07-20 1989-01-25 Nissan Motor Co., Ltd. Procédé de commande d'un amortisseur
WO1991000967A1 (fr) * 1989-07-11 1991-01-24 Forsheda Ab Dispositif d'amortissement de vibrations

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5890704A (en) * 1994-11-10 1999-04-06 Tokai Rubber Industries, Ltd. Fluid-filled elastic cylindrical mount using split outer sleeve with sealing members
EP0884731A2 (fr) * 1997-06-09 1998-12-16 Matsushita Electric Industrial Co., Ltd. Appareil d'enregistrement et de reproduction de disque et amortisseur dynamique approprié
EP0884731A3 (fr) * 1997-06-09 1999-12-15 Matsushita Electric Industrial Co., Ltd. Appareil d'enregistrement et de reproduction de disque et amortisseur dynamique approprié
US6178156B1 (en) 1997-06-09 2001-01-23 Matsushita Electric Industrial Co., Ltd. Disk recording and reproduction apparatus and dynamic damper thereof
FR2779500A1 (fr) * 1998-06-05 1999-12-10 Freudenberg Carl Amortisseur de vibrations
EP1132644A3 (fr) * 2000-03-01 2003-06-25 Tokai Rubber Industries, Ltd. Dispositif d'amortissement de vibrations pour véhicule
WO2002042661A1 (fr) * 2000-11-22 2002-05-30 Toyo Tire & Rubber Co., Ltd. Tige de raccordement
EP2011673A3 (fr) * 2007-07-04 2010-01-20 Tokai Rubber Industries, Ltd. Dispositif d'amortissement de vibrations et son procédé de fabrication
US8020677B2 (en) 2007-07-04 2011-09-20 Tokai Rubber Industries, Ltd. Vibration damping device and manufacturing method thereof
CN106133379A (zh) * 2014-04-02 2016-11-16 大众汽车有限公司 用于交通工具座椅的减振器、交通工具座椅和机动车
FR3023339A1 (fr) * 2014-07-04 2016-01-08 Peugeot Citroen Automobiles Sa Dispositif d'amortissement de vibrations affranchi des effets de la gravite, pour un vehicule

Also Published As

Publication number Publication date
SE9103020D0 (sv) 1991-10-17
SE469239B (sv) 1993-06-07
SE9103020L (sv) 1993-04-18

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