EP1579961A2 - Einrichtung zur Vibrationsdämmung - Google Patents
Einrichtung zur Vibrationsdämmung Download PDFInfo
- Publication number
- EP1579961A2 EP1579961A2 EP05003653A EP05003653A EP1579961A2 EP 1579961 A2 EP1579961 A2 EP 1579961A2 EP 05003653 A EP05003653 A EP 05003653A EP 05003653 A EP05003653 A EP 05003653A EP 1579961 A2 EP1579961 A2 EP 1579961A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- elastic
- pressure
- load distribution
- bearing part
- distribution element
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/04—Handles; Handle mountings
- B25D17/043—Handles resiliently mounted relative to the hammer housing
Definitions
- the invention relates to a device for vibration insulation of a handle unit of a hand-held Machine against vibrations of a major part of the machine, with a load distribution element and with a pressure shell element and a pull-shell element, between where the load distribution element is arranged, wherein the pressure and the traction shell element are defined either on the main part of the machine or on the handle unit of the machine and the load distribution element is fixed to the other of these two parts, and wherein the load distribution element from the push and pull shell element via at least one between the pressure shell element and the Lastvermaschinelement arranged elastic pressure bearing part and at least one arranged between the train-shell element and the load distribution element elastic Weglagerteil is supported in the compression and tension of the handle unit.
- a device of the type mentioned is known from DE 39 13 971 A1.
- the load distribution element is formed in this device by a wreath, the one at the main part
- the machine is fixed grip holder and protrudes from this outward and radially tapering outward.
- the shell elements are made of sections of two Handle shells formed, which the wreath in a bell-shaped expanding area take up. Between the shell elements and the wreath is on both sides of the wreath respectively a set of elastomeric damping elements, in particular rubber. Also
- the previously mentioned disadvantages occur. Among other things comes it in turn to relatively strong shear stresses of the elastic elements. During the It can also lead to significant changes in the guidance accuracy of the machine due to settlements of the elastic elements come.
- the object of the invention is to provide an improved device of the type mentioned, on the one hand a very good vibration isolation, on the other hand a very good Guide the machine is possible. According to the invention, this is achieved by a device with the features of claim 1.
- the elastic bearing parts Preload these can be in the vibrationally ideal operating point of their Spring characteristic to be brought.
- the operating point of the elastic bearing parts in this case by the Bias can be adjusted so that there is an optimal vibration damping. It It will also possible settlements in the course of use by which the leadership the machine deteriorates, counteracted.
- the pressure formwork element limit and the Switzerlandschalungselement a cavity in which the load distribution element is arranged, wherein the cavity has at least one opening, which of a connecting element for the attachment of the load distribution element is interspersed, and wherein the total area the openings of the cavity less than 30%, preferably less than 10% of the cavity make up for limiting internal surfaces.
- kassenites formed system It is thereby at least largely preferably substantially complete, kassenites formed system.
- Due to the at least largely encapsulated execution can advantageously a very torsionally rigid connection are formed so that the stability of the device even at harsh operating conditions is ensured.
- a substantially complete encapsulation only one or more openings are present in the corresponding shell element, by which one or more connecting elements for fastening the load distribution element (either on the main body or on the grip unit) with play. in principle It would also be possible and possible, the gap between the connecting element and the Seal shell element, whereby a complete encapsulation could be achieved.
- a drilling machine in particular percussion drill
- a device according to the invention for vibration isolation of Handle unit 1 of the machine from the main part 2 of the machine in which the vibrations or Vibrations can be used can be used.
- An inventive device can be used in different types of vibration generating machinery, For example, drills, demolition equipment, Schremmphasemmern etc ..
- the drive motor (not shown) is arranged.
- the handle unit 1 may have various non-vibration (or less) or vibration-sensitive ones Parts of the machine be housed, such as electrical controls.
- the user via the handle unit 1 is a pressure and / or tensile force applied to the main part 2 of the machine (in the axial direction of the respective tool the machine).
- the pressure and pulling direction 3 of the handle unit 1, in which the main pressure or tensile force is applied, is indicated in Fig. 1 and 2 each by a double arrow.
- the inventive device for vibration isolation of the handle unit 1 relative to the Main part 2 comprises a pressure shell element 4 and a tension shell element 5, which is a load distribution element 6 between them.
- the load distribution element 6 is in the illustrated embodiment rigidly connected to the main part 2.
- bolt-like Connecting elements 7 may be present.
- the connecting elements 7 integrally formed with the load distribution element 6 and the load distribution element 6 and the connecting elements 7 are through through holes of fastening screws 17 penetrated, which screwed into threaded holes in the main part 2 are.
- the connecting elements 7 could also separate from the load distribution element 6 components be.
- the connecting elements 7 could be formed integrally with the main part 2 be and the load distribution element 6 could be screwed to the connecting elements.
- the pressure-shell element 4 is in the illustrated embodiment integral with a housing part or another part of the handle unit 1 is formed. To the rigid connection of the Pressure shell element 4 with the pull-shell element 5 are connecting means 8 in shape of screws present.
- the pressure shell element 4 could also be considered as of the handle unit. 1 be formed separate component and be rigidly connected to this.
- the pressure shell element 4 and the tension shell element 5 are separate components, which are connected to each other via connecting means 8, in particular screws.
- an elastic pressure bearing part 9 arranged, which on a contact surface 18 of the pressure-shell element 4 and a contact surface 11 of the load distribution element 6 is present.
- an elastic Switzerlandteil 10 is arranged, which at a Contact surface 19 of the pull-shell element 5 and a contact surface 12 of the load distribution element 6 is present.
- the elastic bearing parts 9, 10 are formed by a cellular elastomer, in particular of a cellular polyurethane.
- the thickness d 1 of the thrust bearing part 9 may be greater than the thickness d 2 of the tension bearing part 10. If z. B. in a demolition tool the tool gets stuck, high tensile forces must be transmitted when tearing, including the use of a thin, rigid Switzerlandlagerteils 10 is advantageous. The vibration isolation can play a minor role in this load case.
- the elastic pressure bearing part 9 and the elastic tension bearing part 10 are each on a contact surface 11, 12 of the load distribution element 6, wherein the contact surfaces 11, 12 on opposite Side of the load distribution element 6 with respect to a through the load distribution element 6 itself extending plane 13, which is perpendicular to the compression and tension direction 3.
- the projection of the contact surface 11 and / or 12 on the plane 13 at least a large part (i.e., more than 50%) of the total cross-sectional area of the machine in this Level, with a value of more than 80% is particularly preferred.
- the contact surfaces 11, 12 thus extend over the majority of the handle cross section in the region of the load distribution element 6. A tilting of the handle unit 1 relative to the main part 2 is counteracted.
- the elastic bearing parts would be the load distribution element 6 overall Surrounded on all sides and on the one hand on the load distribution element 6, on the other hand on a Abut shell element.
- the contact surfaces 11, 12 advantageously have a substantially perpendicular to Pressure and tension direction 3 (that is, with an angular deviation of less than +/- 10 ° to the vertical) portion, which preferably the majority of the respective contact surface 11, 12th for the elastic pressure bearing part 9 or Switzerlandlagerteil 10 makes.
- the pressure shell element 4 and the traction shell element 5 define a cavity, in FIG the load distribution element 6 is arranged. If in another embodiment, more Shell elements are present, the cavity is also limited by these. Of the Cavity has in the illustrated embodiment, four openings 14, of the connecting elements 7 are interspersed. The total passage cross-sectional area of the openings 14 of the cavity is less than 30%, preferably less than 10% of the Cavity limiting inner surfaces, which in the embodiment shown by Pressure shell element 4 and pull-shell element 5 are formed.
- the load distribution element 6 and the elastic bearing parts 9, 10 are thus largely (total area of the openings of the Cavity less than 30% of the cavity limiting inner surface) or im Essentially complete (total area of the openings of the cavity less than 10% of the encapsulating the cavity defining inner surfaces).
- the load distribution element 6 preferably tapers in at least two edge regions, with respect to a parallel to the compression and tension direction 3 aligned center plane 15, 16th opposite, towards its side edge. Through these conical or wedge-shaped tapers a centering of the handle unit 1 is achieved under pressure or tensile stress.
- the load distribution element 6 has in the direction perpendicular to the compression and tension direction 3 on all sides such tapered edges. In the embodiment shown, the load distribution element 6 plate-shaped with marginally tapered edges formed.
- the load distribution element 6 could also have a spatial, non-planar design, whereby an adaptation to different handle shapes is possible.
- a stop for limiting a lateral displacement of the handle unit 1 opposite the main part 2 could also be formed in another way, for example by acting between the load distribution element 6 and the pressure-shell element 4 Stops (which lie for example in a recess of the elastic thrust bearing part 9 could).
- the elastic pressure bearing part 9 and the elastic tension bearing part 10 may advantageously be formed of mat material, whereby a very simple production of these elastomeric parts is possible. Due to the bias, the elastic bearing parts 10, 11 adapt to the shape of the pressure and tension shell element 4, 5 at.
- the elastic bearing parts 9, 10 are thus plate-shaped inserts which in the relaxed state, ie before insertion or after their complete relaxation after removal, have a thickness d 1 or d 2 which remains constant over their extent.
- a single pressure bearing part 9 and a single tension bearing part 10 are present as elastic bearing parts.
- the thicknesses d 1 , d 2 of the elastic bearing parts 9, 10 are reduced by at least 5%, preferably by at least 10%, from their relaxed state by the bias in the assembled state of the unit.
- the elastic pressure bearing part 9 can be compressed to a thickness d 1 which is in the range between 95% and 75% of the value present in the relaxed state.
- This area can also apply to the elastic tension bearing part 10.
- the elastic tension bearing part is formed substantially softer relative to the elastic pressure bearing part and is thereby compressed more strongly in the assembled state of the device, for example, to a thickness d 2 in the range between 5 and 20% of the thickness in the relaxed state.
- the densities of the elastic bearing parts can be within a wide range depending on the application, for example in the range between 50 and 1000 kg / m 3 .
- the bias can be locally increased, for example, by appropriate inward reaching projections or elevations in a respective shell element 4, 5. It can thereby the stiffness of the elastic storage can be varied locally.
- the elastic pressure bearing part could 9th in the area in which lower forces occur during regular use, be provided with recesses to the pressure bearing part in this area overall softer close.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Springs (AREA)
Abstract
Description
- Fig. 1
- eine schematische Seitenansicht einer handgeführten Maschine mit einem Ausführungsbeispiel einer erfindungsgemäßen Einrichtung (Schnittlinie A-A von Fig. 3);
- Fig. 2
- einen Schnitt entlang der Linie B-B von Fig. 3 und
- Fig. 3
- eine stirnseitige Ansicht auf die Griffeinheit (Blickrichtung C in Fig. 1).
- 1
- Griffeinheit
- 2
- Hauptteil
- 3
- Druck- und Zugrichtung
- 4
- Druck-Schalenelement
- 5
- Zug-Schalenelement
- 6
- Lastverteilelement
- 7
- Verbindungselement
- 8
- Verbindungsmittel
- 9
- elastisches Drucklagerteil
- 10
- elastisches Zuglagerteil
- 11
- Anlagefläche
- 12
- Anlagefläche
- 13
- Ebene
- 14
- Öffnung
- 15
- Mittelebene
- 16
- Mittelebene
- 17
- Befestigungsschraube
- 18
- Anlagefläche
- 19
- Anlagefläche
Claims (15)
- Einrichtung zur Vibrationsdämmung einer Griffeinheit (1) einer handgeführten Maschine gegenüber Vibrationen eines Hauptteils (2) der Maschine, mit einem Lastverteilelement (6) und mit einem Druck-Schalenelement (4) und einem Zug-Schalenelement (5), zwischen denen das Lastverteilelement (6) angeordnet ist, wobei das Druck- und das Zug-Schalenelement (4, 5) entweder am Hauptteil (2) der Maschine oder an der Griffeinheit (1) der Maschine festgelegt sind und das Lastverteilelement (6) am anderen dieser beiden Teile (1, 2) festgelegt ist, und wobei das Lastverteilelement (6) vom Druck- und Zug-Schalenelement (4, 5) über mindestens ein zwischen dem Druck-Schalenelement (4) und dem Lastverteilelement (6) angeordnetes elastisches Drucklagerteil (9) und mindestens ein zwischen dem Zug-Schalenelement (5) und dem Lastverteilelement (6) angeordnetes elastisches Zuglagerteil (10) in Druck- und Zugrichtung (3) der Griffeinheit (1) abgestützt ist, dadurch gekennzeichnet, dass das Druck-Schalenelement (4) und das Zug-Schalenelement (5) separate Bauteile sind, die über Verbindungsmittel (8) miteinander verbunden sind, und dass das mindestens eine elastische Drucklagerteil (9) und das mindestens eine elastische Zuglagerteil (10), welche von einem zelligen Elastomer gebildet werden, zwischen dem Lastverteilelement (6) und dem Druck- bzw. Zug-Schalenelement (4, 5) vorgespannt sind.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Lastverteilelement (6) Anlageflächen (11, 12) für das elastische Druck- und Zuglagerteil (9, 10) aufweist, welche zumindest einen im Wesentlichen senkrecht zur Druck- und Zugrichtung (3) stehenden Abschnitt besitzen, der vorzugsweise den Großteil der Anlagefläche (11, 12) für das elastische Drucklagerteil (9) und/oder Zuglagerteil (10) ausmacht.
- Einrichtung nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass die Projektion der Anlagefläche des Lastverteilelements (6) für das elastische Drucklagerteil (9) und/oder der Anlagefläche des Lastverteilelements (6) für das elastische Zuglagerteil (10) auf eine senkrecht zur Druck- und Zugrichtung (3) der Griffeinheit (1) stehende, das Lastverteilelement (6) durchsetzende Ebene (13) einen Großteil der gesamten Querschnittsfläche der Maschine in dieser Ebene ausmacht, vorzugsweise mehr als 80% der gesamten Querschnittsfläche.
- Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zumindest ein Großteil, vorzugsweise mindestens 80%, der gesamten Oberfläche des Lastverteilelements (6) eine Anlagefläche (11, 12) für das elastische Drucklagerteil (9) und das elastische Zuglagerteil (10) bildet.
- Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Lastverteilelement (6) allseitig elastisch gelagert ist.
- Einrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Lastverteilelement (6) sich in mindestens zwei Randbereichen, die bezüglich einer parallel zur Druck- und Zugrichtung (3) der Griffeinheit (1) ausgerichteten Mittelebene (15, 16) gegenüberliegen, in Richtung zu seinem Seitenrand hin verjüngt.
- Einrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Druck-Schalenelement (4) und das Zug-Schalenelement (5) einen Hohlraum begrenzen, in dem das Lastverteilelement (6) angeordnet ist, wobei der Hohlraum mindestens eine Öffnung (14) aufweist, welche von einem Verbindungselement (7) für das Lastverteilelement (6) durchsetzt wird, wobei die Gesamtfläche der Öffnungen des Hohlraums weniger als 30% vorzugsweise weniger als 10% der den Hohlraum begrenzenden inneren Oberflächen der Einrichtung ausmachen.
- Einrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Druck-Schalenelement (4) und das Zug-Schalenelement (5) jeweils eine Vertiefung aufweisen, welche im zusammengesetzten und über die Verbindungsmittel (8) miteinander verbundenen Zustand der beiden Elemente (4, 5) einen Hohlraum bilden, in dem das Lastverteilelement (6) angeordnet ist.
- Einrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das elastische Drucklagerteil (9) und das elastische Zuglagerteil (10) als, vorzugsweise plattenförmige, Einlegeteile ausgebildet sind.
- Einrichtung nach Anspruch 9, dadurch gekennzeichnet, dass das elastische Drucklagerteil (9) und das elastische Zuglagerteil (10) im entspannten Zustand über ihre Ausdehnungen gleich bleibende Dicken (d1, d2) aufweisen.
- Einrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass als elastische Lagerteile für das Lastverteilelement (6) nur ein einzelnes Drucklagerteil (9) und ein einzelnes Zuglagerteil (10) vorhanden sind.
- Einrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass das mindestens eine elastische Drucklagerteil (9) eine größere Dicke (d1) und/oder eine größere Steifigkeit als das elastische Zuglagerteils (10) besitzt.
- Einrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass das zellige Elastomer ein geschäumtes Polyurethan ist.
- Einrichtung nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die Dicke (d1) des elastischen Drucklagerteils (9) durch die Vorspannung um mindestens 5%, vorzugsweise um mindestens 10%, gegenüber seinem entspannten Zustand verringert ist.
- Einrichtung nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die Dicke (d2) des elastischen Zuglagerteils (10) durch die Vorspannung um mindestens 5%, vorzugsweise um mindestens 10%, gegenüber seinem entspannten Zustand verringert ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0049004A AT414223B (de) | 2004-03-22 | 2004-03-22 | Einrichtung zur vibrationsdämmung |
| AT4902004 | 2004-03-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1579961A2 true EP1579961A2 (de) | 2005-09-28 |
| EP1579961A3 EP1579961A3 (de) | 2009-07-15 |
Family
ID=34842259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05003653A Withdrawn EP1579961A3 (de) | 2004-03-22 | 2005-02-21 | Einrichtung zur Vibrationsdämmung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1579961A3 (de) |
| AT (1) | AT414223B (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5834271B2 (ja) * | 1980-07-18 | 1983-07-26 | 日立工機株式会社 | 振動工具のハンドル防振装置 |
| JPS5946751B2 (ja) * | 1982-02-13 | 1984-11-14 | 株式会社エムエス技研 | 防振ハンドル装置 |
| JP2534318B2 (ja) * | 1988-04-30 | 1996-09-11 | 日立工機株式会社 | 動力工具の防振ハンドル |
| DE4211316A1 (de) * | 1992-04-04 | 1993-10-07 | Atlas Copco Elektrowerkzeuge | Gehäuse einer Elektrowerkzeugmaschine |
-
2004
- 2004-03-22 AT AT0049004A patent/AT414223B/de not_active IP Right Cessation
-
2005
- 2005-02-21 EP EP05003653A patent/EP1579961A3/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| AT414223B (de) | 2006-10-15 |
| ATA4902004A (de) | 2006-01-15 |
| EP1579961A3 (de) | 2009-07-15 |
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