EP1940594B1 - Portable power tool - Google Patents
Portable power tool Download PDFInfo
- Publication number
- EP1940594B1 EP1940594B1 EP05806448A EP05806448A EP1940594B1 EP 1940594 B1 EP1940594 B1 EP 1940594B1 EP 05806448 A EP05806448 A EP 05806448A EP 05806448 A EP05806448 A EP 05806448A EP 1940594 B1 EP1940594 B1 EP 1940594B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- motor housing
- handle
- housing
- machine tool
- 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.)
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- 238000013016 damping Methods 0.000 claims description 79
- 239000000463 material Substances 0.000 claims description 19
- 238000001746 injection moulding Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009993 protective function Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/006—Vibration damping means
Definitions
- the invention relates to a hand tool according to the preamble of claim 1.
- a hand tool according to the preamble of claim 1.
- Such a device is in US 5692574 disclosed.
- Such a machine tool is also from the WO 2004/039541 A1 known.
- a vibration damper comprising on the side of the motor housing a holder and on the side of the handle housing a receiving plate, between which an annular damping element is arranged in the axial direction ,
- the three components of the vibration damper are stacked in the axial direction and penetrated in the axial direction by a number of helical securing elements.
- the mounting plate is positively secured to the fuse elements. A loosening of the receiving plate held on the rear handle of the motor housing with damaged damping element is prevented.
- the aforementioned arrangement requires in the axial and radial directions a considerable space and is complicated in construction.
- the soft damping element is exposed in the peripheral area and exposed to the prevailing harsh environmental conditions during operation.
- the invention has the object of providing a generic machine tool in such a way that a damping and safety function is ensured in a simplified structure.
- the damping sleeve and the handle holder are designed as a two-component injection molded component.
- positional tolerances of the individual components are avoided.
- Clearly defined contact surfaces between the individual components can be specified precisely in terms of design and remain constant over a long period of operation due to the prevention of the ingress of dirt and moisture. Breakthroughs in a sleeve portion of the handle holder and / or the mounting sleeve are expediently filled by the material of the damping sleeve.
- a positive engagement is given, which ensures a permanent positional fixation of the individual components to each other.
- the vibration damper consists of a motor housing associated mounting sleeve, a coaxial mounting sleeve embracing elastic damping sleeve and also coaxial with the mounting sleeve and the damping sleeve embracing, the handle housing associated handle holder is constructed.
- the substantially rigid assembly of the handle holder and the handle housing is positively secured with clearance directly to the substantially rigid assembly of the mounting sleeve and the motor housing.
- the mounting sleeve, the elastic damping sleeve and the handle holder are layered in the radial direction, which allows a thin-walled construction.
- the play-related, positive securing the substantially rigid assembly of the handle holder and the handle housing to the also substantially rigid assembly of the mounting sleeve and the motor housing allows a free elastic, vibration damping relative deformation between the two rigid units and thus an effective vibration isolation.
- the playful positive locking secures the handle housing on the motor housing, without hindering the vibration decoupling. Due to the direct positive locking between the two aforementioned units can be dispensed with additional securing means.
- the vibration damper needs no geometrical adaptation to accommodate such security elements, which contributes to the reduction of its volume.
- the damping sleeve can be designed solely on the basis of the required damping effect, without being impaired in their function by separate security elements.
- the handle housing engages over the vibration damper in an axial direction in the direction of the motor housing and is secured with play directly on the motor housing.
- the backup chain consists of only two members, namely the handle housing and the motor housing, while all other links such as the mounting sleeve, the damping sleeve and the handle holder are removed from this backup chain.
- the achieved safety function is not limited to damage in the damping sleeve, but also covers damage to the mounting sleeve or the handle holder from.
- the outside cross-arrangement of the handle housing leads to a protective function of the vibration damper. All individual components of the vibration damper are covered to the outside by the overlapping region of the handle housing. Dirt, moisture, UV radiation or other adverse environmental influences are kept away from the vibration damper.
- the motor housing has a radially outwardly open circumferential groove away from the mounting sleeve into which a radially inwardly directed annular flange of the handle housing engages with play.
- the arrangement of the circumferential groove in the peripheral region of the motor housing achieved in conjunction with the annular flange a high Load capacity. Mounting sleeve and ring flange together form a labyrinth seal, which enhances the protective function covering the vibration damper.
- the handle holder has at least one radially inwardly directed securing projection which engages with play in a securing receptacle of the fastening sleeve.
- the position assurance of the handle housing relative to the motor housing takes place indirectly by direct interaction between the handle holder and the mounting sleeve.
- Handle housing and motor housing need not be in direct securing interaction with each other.
- the vibration damper can be arranged with a maximum radius to the device longitudinal axis annular in the region of the outer contour of the motor housing and handle housing.
- the outside, sleeve-shaped handle holder exerts a protective function on the sensitive damping sleeve.
- the securing projection is guided together with a radial damping portion of the damping sleeve from outside to inside in the fuse holder, wherein the radial damping portion fills the game between the securing projection and the fuse holder. It is therefore not a completely free game, but a game that is allowed by the elastic deformation of the radially inwardly projecting damping section. Gaps, cavities or the like in which dirt could immobilize motion are avoided.
- a particular circumferential gap is provided between the handle holder and the motor housing in the axial direction, protruding from a shock edge of the damping sleeve radially beyond the contour of the handle holder and the motor housing.
- the damping sleeve exerts a multiple function.
- the rubber-elastic, soft material of the damping sleeve reduces the device load in the area of the impact edge in the event of external shock or impact loads.
- the slip-resistant haptic properties of the damper material increase the grip of the device housing.
- the abutting edge acts as a seal in the circumferential gap between the motor housing and the handle housing, so that the penetration of dirt and moisture is effectively prevented.
- a projecting beyond the contour of the handle holder, the outside of the handle holder arranged and in particular integrally formed and the same material with the damping sleeve abutting edge may be provided, which contributes to improving the grip and to reduce shock loads.
- the damping sleeve has an axial damping section, which lies in the axial direction between an end face of the holder and an end face associated with the motor housing.
- a section is created, which is subjected to tensile and compressive stresses. It is an elevated one Number of degrees of freedom for the structural adjustment of the vibration and damping behavior given.
- the assembly of the handle holder and the damping sleeve in the form of two firmly interconnected half shells In particular, a dividing plane of the two half-shells with respect to the axial direction is arranged at an angle, in particular at 90 ° to a dividing plane of two housing shells of the motor housing.
- the twisted arrangement of both graduation planes to each other allows the use of the two half-shells as a connecting element for the two housing shells of the motor housing.
- the assembly costs are reduced. Worn vibration dampers can be replaced by simply replacing the half shells, which are designed as individual parts replace.
- a connection of the two half shells together is expediently by screwing or by pushing an external, circumferential clamping ring.
- Fig. 1 shows in a partially sectioned side view of a hand tool according to the invention using the example of a cutting grinder.
- a motor housing 1 of the machine tool a not-shown electric motor is arranged, which drives a working tool on the example of a cutting disk 32 via a likewise not shown, arranged in a transmission housing 30 angle gear.
- the cutting disk 32 is held on a rotationally driven about a rotation axis 33 tool shaft 31, wherein the rotation axis 33 is approximately perpendicular to a longitudinal axis 29 of the approximately cylindrical, here slightly conical motor housing 1.
- a handle housing 3 is arranged, which can accommodate various controls for the drive motor and forms a rear handle of the machine tool.
- the drive motor and blade 32 generate vibrations that are transmitted to the motor housing 1 and components held thereto.
- a elastic vibration damper 2 attached to the motor housing 1.
- the rubber-elastic vibration damper 2 allows a swinging relative movement of the motor housing 1 relative to the handle housing 3. Its elastic compliance is designed so that the vibrations transmitted only significantly reduced to the handle 3. In addition, there is a damping effect of the rubber-elastic material used in the vibration damper 2.
- an axial direction 7 is predetermined, which is approximately parallel to the longitudinal axis 29 of the motor housing 1 in the illustrated embodiment.
- the handle housing 3 engages over the vibration damper 2 in the axial direction 7 in the direction of the motor housing 1 and is secured with play directly on the motor housing 1. Further details are related to the FIGS. 2 and 3 explained in more detail.
- the clearance between the handle housing 3 and the motor housing 1 permits, on the one hand, a vibration-decoupling relative movement between the two aforementioned assemblies. On the other hand, prevents the game-afflicted fuse on the motor housing 1, that in case of wear or damage to the vibration damper 2, the handle housing 3 dissolves from the motor housing 1.
- the vibration damper 2 is constructed comparable to a pipe section lying in the axial direction 7, which is arranged approximately coaxially to the longitudinal axis 29 and rotates close to the circumferential contour of the motor housing 1 and the handle housing 3.
- the vibration damper 2 from a motor housing 1 associated mounting sleeve 4, a coaxial with the mounting sleeve 4 encompassing elastic damping sleeve 5 and also coaxial with the mounting sleeve 4 and the damping sleeve 5 encompassing, the handle housing 3 associated handle holder 6 constructed.
- the coaxial structure is chosen such that the mounting sleeve 4 and the handle holder 6 are constructed with the intermediate damping sleeve 5 radially layered from the inside to the outside.
- the handle housing 3 is fixedly connected to the handle holder 6 and forms together with this a structural unit, which is generally rigid relative to the rubber-elastic resilience of the damping sleeve.
- the vibration-decoupling and vibration damping relative movement between the two components is essentially limited to the deformation of the damping sleeve 5.
- angle grinder instead of the angle grinder shown here, other comparable portable power tools, in particular with electric motor drive such as drills or the like. Be provided.
- Fig. 2 shows an exploded view of a single housing shell 26 of the motor housing 1 after Fig. 1 in the region of the vibration damper 2.
- An opposite, not shown here housing shell is constructed approximately mirror-symmetrically according to the same principle and complements the mounting with the half-shell 26 shown here to the motor housing 1 with the molded vibration damper 2. It can be seen that the mounting sleeve 4 is made in one piece with the motor housing 1. It can also be a two-part design appropriate.
- a radially outwardly open, circular peripheral circumferential groove 8 is arranged between the mounting sleeve 4 and the motor housing 1, which in the axial direction 7 to the motor housing 1 through an end wall 35 and in the opposite direction to the mounting sleeve 4 through a circumferential, outer annular flange 34 is limited.
- the handle holder 6 comprises a cylindrical sleeve portion 19, to the front side on the side facing away from the motor housing 1, a radially outwardly rising, circumferential outer annular flange 36 connects.
- the mounting sleeve 4 and the sleeve portion 19 of the handle holder 6 are provided with a number of openings 20, 21.
- the handle holder 6 and the mounting sleeve 4 are integrally designed as a two-component injection molded component, wherein the sleeve portion 19 of the handle holder 6 and the mounting sleeve 4 are enclosed on both sides in the radial direction by the material of the damping sleeve 5.
- the material of the damping sleeve 5 penetrates the openings 20, 21, whereby an intimate, positive connection of the damping sleeve 5 with the mounting sleeve 4 and the handle holder 6 is brought about.
- the housing shell 26 shown with an associated half-shell of the vibration damper 2 is made in one piece as a two-component injection molded component. It may also be expedient, with appropriate geometric design, the mounting sleeve 4, the damping sleeve 5 and the handle holder 6 to manufacture as separate items.
- Fig. 3 shows in enlarged view the detail III after Fig. 1 with the in Fig. 2 shown motor housing 1 and the vibration damper 2 also shown there in the assembled state. Accordingly, it can be seen that the damping sleeve 5 is formed in cross-section approximately S-shaped, wherein the mounting sleeve 4 is completely enclosed in the radial direction inside and outside of the material of the damping sleeve 5. The same applies to the sleeve portion 19 of the handle holder 6, wherein for generating the required elastic compliance of the larger material cross-section of the damping sleeve 5 is in the radial direction between the mounting sleeve 4 and the handle holder 6.
- the outer annular flange 34 and the sleeve portion 19 of the handle holder 6 have mutually spaced end faces 18, 17, between which play a one-piece molded axial damping portion 16 of the damping sleeve 5, and which is provided for receiving extending in the axial direction 7 compressive stresses.
- the outer annular flange 36 of the handle holder 6 protrudes in the radial direction beyond the material of the damping sleeve 5 and engages without play in an inner annular groove 37 of the handle housing 3.
- the handle holder 6 is designed separately from the handle housing 3. Due to the play-free engagement of the outer annular flange 36 in the inner annular groove 37, a substantially rigid and immovable connection between the handle housing 3 and the handle holder 6 is made. It may also be expedient embodiment, the relative rotational angle position of the handle housing 3 relative to the handle holder 6 to the in Fig. 1 shown longitudinal axis 29 allows around, wherein the interaction of the outer annular flange 36 and the inner annular groove 37 produces a rigid connection between the handle housing 3 and the handle holder 6.
- FIG. 3 The representation after Fig. 3 can also be seen that the vibration damper 2 rotates radially outwardly near the peripheral contour of the motor housing 1 and the handle housing 3 and the outside of a section shown cut section of the handle housing 3 in the axial direction 7 to the motor housing 1 is overlapped.
- the handle housing 3 carries at its the motor housing 1 facing front inside its peripheral wall shown cut a radially inwardly directed circumferential flange 9, which engages with free play in the circumferential groove 8, the motor housing 1.
- the annular flange 9 is located at a radial distance from the bottom of the circumferential groove 8 and at an axial distance in each case to the end wall 35 and the outer annular flange 34.
- the radially inwardly directed annular flange 9 engages so deep in the circumferential groove 8 in that it is based on the axial direction. 7 in overlap with the outer annular flange 34 of the motor housing 1 is located.
- the axial and radial clearance between the annular flange 9 and the circumferential groove 8 allows a freely oscillating relative movement of the assembly of the motor housing 1 and the mounting sleeve 4 relative to the assembly of the handle housing 3 and the handle holder 6.
- the handle housing 3 is secured directly against the motor housing 1 against detachment by the annular flange 9 positively engages with play in the circumferential groove 8.
- Fig. 4 shows a further embodiment of the invention, in which a perspective view of the engine housing 1 as shown Fig. 1 and a two half-shells 22, 23 comprehensive vibration damper 2 are provided.
- the motor housing 1 consists of two housing shells 26, 27.
- a dividing line 41 indicates an in Fig. 5 Dividing plane 25 shown in more detail between the two housing shells 26, 27 at.
- the fastening sleeve 4 is provided on both sides in each case with a radially outwardly rising annular flange 38, 39. Between the two annular flanges 38, 39, the fastening sleeve 4 is provided at two diametrically opposite points with a securing receptacle 11 in the form of an open breakthrough.
- the two half-shells 22, 23 of the vibration damper 2 are executed, between which a dividing plane 24 is located.
- the two half-shells 22, 23 are each in one piece as a two-component injection molded component separately from the handle housing 3 (FIGS. Fig. 1 ) and executed by the motor housing 1 and include half shells of the damping sleeve 5 and the handle holder 6.
- the damping sleeve 5 and the handle holder 6 can also be made separately from each other in the form of individual half-shells.
- Both half shells 22, 23 are provided centrally on their inner side, each with a radially inwardly rising securing projection 10 which engages in the assembled state in the associated fuse holder 11 of the mounting sleeve 4.
- a circumferential approximately cylindrical clamping ring 28 is provided, which comes to lie in the mounted state on an associated circumferential cylindrical outer surface 40 of the two half-shells 2, 23.
- Fig. 5 shows in a longitudinal sectional view of the arrangement Fig. 4 in the assembled state.
- the two diametrically opposite securing projections 10 of the sleeve-shaped handle holder 6 are directed radially inward and engage from outside to inside with play in the respectively associated securing receptacle 11 of the mounting sleeve 4 a.
- Comparable to the free play between the annular flange 9 and the circumferential groove 8 after Fig. 3 can be useful here also a free radial and axial clearance between the locking projection 10 and the fuse holder 11.
- the two securing projections 10 are passed together with a radial damping portion of the damping sleeve 5 from outside to inside through the fuse holder 11.
- the radially inwardly uplifting damping section 12 of the damping sleeve 5 encloses the securing projection 10 completely and projects together with this into the interior of the mounting sleeve 4 inside.
- the radial damping section 12 fills the clearance between the securing projection 10 and the securing receptacle 11 and, due to its elastic compliance, allows a relative movement of the rigid structural unit out of the motor housing 1 and the fastening sleeve 4 relative to the rigid structural unit from the handle housing 3 (not shown here).
- a circumferential gap 13 is provided between the handle holder 6 and the motor housing 1, which is filled by the integrally molded material of the rubber-elastic damping sleeve 5.
- the material of the damping sleeve 5 is formed such that over the contour of the handle holder 6 and the motor housing 1 protruding, rounded in cross-section peripheral abutment edge 14 is formed.
- an axial damping portion 16 of the damping sleeve 5 is formed, which is elastically resilient between end surfaces 17, 18 of the motor housing 1 and the handle holder 6.
- a sealing effect is also a recording of acting in the axial direction 7 compressive stresses.
- Fig. 5 The representation after Fig. 5 can still be seen that the dividing plane 24 between the two half-shells 22, 23 of the vibration damper 2 relative to the longitudinal axis 29 by 90 ° relative to the dividing plane 25 between the two in Fig. 4 shown housing shells 26, 27 of the motor housing. 1 twisted lies.
- the dividing plane 25 is here in the plane of the drawing, while the dividing plane 24 is perpendicular thereto.
- the clamping ring 28 runs around the two half-shells 22, 23 of the vibration damper 2 and holds them together. Since the two half shells 22, 23 tightly enclose the mounting sleeve 4 integrally formed on the motor housing 1, these also hold the two housing shells 26, 27 (FIG. Fig. 4 ) of the motor housing 1 in the region of the fastening sleeve 4 together.
- An outer surface of the clamping ring 28 is aligned approximately with an outer surface of the motor housing 1 and the handle housing 3 (FIGS. Fig. 1 ) and can also serve as a grip surface for the user.
- a corresponding surface structuring or non-slip coating of the outer surface of the clamping ring 28 may be appropriate.
- Fig. 1 illustrated handle housing 3 is shown in accordance with the illustration Fig. 3 held on the outer annular flange 36 of the handle holder 6, but extends in the axial direction only to the clamping ring 28. In this case, both components have at least approximately the same circumferential contour.
- the handle housing 3 runs with its inner annular groove 37 (FIG. Fig. 3 ) rotatable about the longitudinal axis 29 on the outer annular flange 36 shown here Locking the selected rotational position, a number of notches 45 is formed in the free end face of the handle holder 6.
- the 6 and 7 show a variant of the arrangement according to the 4 and 5 , Accordingly, a screw connection of the two half-shells 22, 23 is provided with each other.
- the exploded view after Fig. 6 It can be seen that the two half-shells 22, 23 are constructed rotationally symmetrical to each other and each have a hollow pin 42 and a bore 43 at their mutually facing end faces. In the mounted state, the respective hollow pin 42 engages in the opposite bore 43. Tangential from the outside: inward into the two bores 43 are each a screw 44 is inserted and screwed into the hollow pin 42, whereby a firm connection of the two half-shells 22, 23 with each other and with the motor housing 1 is made.
- a further abutting edge 15 is provided, which is made of one piece and the same material with the damping sleeve 5 of the vibration damper 2.
- the abutting edge 15 protrudes outward in the radial direction beyond the contour of the grip holder 6 and runs around the outside of the cylindrical outer surface 40 around the grip holder 6.
- openings in the handle holder 6 the material of the abutting edge 15 and the damping sleeve 5 are filled, the abutting edge 15 is integrally connected to the damping sleeve 5.
- the embodiment is true to the 6 and 7 with the after the 4 and 5 match.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Vibration Dampers (AREA)
- Percussive Tools And Related Accessories (AREA)
Description
Die Erfindung betrifft eine Handwerkzeugmaschine Gemäß dem Oberbegriff des Anspruchs 1. Eine solche Vorrichtung ist in
Eine derartige Werkzeugmaschine ist auch aus der
Die vorgenannte Anordnung erfordert in axialer und radialer Richtung einen erheblichen Bauraum und ist kompliziert im Aufbau. Das weiche Dämpfungselement ist im Umfangsbereich ungeschützt und im Betrieb den dort herrschenden rauhen Umgebungsbedingungen ausgesetzt.The aforementioned arrangement requires in the axial and radial directions a considerable space and is complicated in construction. The soft damping element is exposed in the peripheral area and exposed to the prevailing harsh environmental conditions during operation.
In der
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Werkzeugmaschine derart weiterzubilden, daß eine Dämpfungs- und Sicherungsfunktion bei vereinfachtem Aufbau gewährleistet ist.The invention has the object of providing a generic machine tool in such a way that a damping and safety function is ensured in a simplified structure.
Diese Aufgabe wird durch eine Handwerkzeugmaschine mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a hand tool with the features of
Gemäß der Erfindung sind die Dämpfungshülse und der Griffhalter als Zwei-Komponenten-Spritzgußbauteil ausgeführt. Neben einer Verringerung des Herstellungs- und Montageaufwandes sind insbesondere Lagetoleranzen der einzelnen Baueile untereinander vermieden. Klar definierte Anlageflächen zwischen den einzelnen Komponenten können konstruktiv präzise vorgegeben werden und bleiben über einen langen Betriebszeitraum infolge der Vermeidung des Eindringens von Schmutz und Feuchtigkeit konstant. Durchbrüche in einem Hülsenabschnitt des Griffhalters und/oder der Befestigungshülse sind dabei zweckmäßig vom Material der Dämpfungshülse ausgefüllt. Neben einer klebenden Materialverbindung der einzelnen Komponenten ist auch ein Formschluß gegeben, der eine dauerhafte Lagefixierung der einzelnen Bauteile zueinander sicherstellt.According to the invention, the damping sleeve and the handle holder are designed as a two-component injection molded component. In addition to a reduction of manufacturing and assembly costs, in particular positional tolerances of the individual components are avoided. Clearly defined contact surfaces between the individual components can be specified precisely in terms of design and remain constant over a long period of operation due to the prevention of the ingress of dirt and moisture. Breakthroughs in a sleeve portion of the handle holder and / or the mounting sleeve are expediently filled by the material of the damping sleeve. In addition to an adhesive material connection of the individual components and a positive engagement is given, which ensures a permanent positional fixation of the individual components to each other.
Dazu wird eine Handwerkzeugmaschine vorgeschlagen, bei der der Schwingungsdämpfer aus einer dem Motorgehäuse zugeordneten Befestigungshülse, einer koaxial die Befestigungshülse umgreifenden elastischen Dämpfungshülse und einem ebenfalls koaxial die Befestigungshülse und die Dämpfungshülse umgreifenden, dem Griffgehäuse zugeordneten Griffhalter aufgebaut ist. Die im wesentlichen starre Baueinheit aus dem Griffhalter und dem Griffgehäuse ist formschlüssig mit Spiel direkt an der im wesentlichen starren Baueinheit aus der Befestigungshülse und dem Motorgehäuse gesichert. Bei der vorgeschlagenen koaxialen Bauweise des Schwingungsdämpfers sind die Befestigungshülse, die elastische Dämpfungshülse und der Griffhalter in radialer Richtung geschichtet, was eine dünnwandige Bauweise erlaubt. Die spielbehaftete, formschlüssige Sicherung der im wesentlichen starren Baueinheit aus dem Griffhalter und dem Griffgehäuse an der ebenfalls im wesentlichen starren Baueinheit aus der Befestigungshülse und dem Motorgehäuse erlaubt eine freie elastische, schwingungsdämpfende Relativverformung zwischen beiden starren Baueinheiten und damit eine wirksame Schwingungsentkopplung. Der spielbehaftete Formschluß sichert das Griffgehäuse am Motorgehäuse, ohne die Schwingungsentkopplung zu behindern. Durch die direkte formschlüssige Sicherung zwischen den beiden vorgenannten Baueinheiten kann auf zusätzliche Sicherungsmittel verzichtet werden. Insbesondere der Schwingungsdämpfer braucht keine,geometrische Anpassung zur Aufnahme solcher Sicherungselemente aufzuweisen, was zur Verkleinerung seines Bauvolumens beiträgt. Die Dämpfungshülse kann allein unter den Gesichtspunkten der erforderlichen Dämpfungswirkung ausgelegt werden, ohne in ihrer Funktion durch separate Sicherungselemente beeinträchtigt zu sein.For this purpose, a hand tool machine is proposed in which the vibration damper consists of a motor housing associated mounting sleeve, a coaxial mounting sleeve embracing elastic damping sleeve and also coaxial with the mounting sleeve and the damping sleeve embracing, the handle housing associated handle holder is constructed. The substantially rigid assembly of the handle holder and the handle housing is positively secured with clearance directly to the substantially rigid assembly of the mounting sleeve and the motor housing. In the proposed coaxial design of the vibration damper, the mounting sleeve, the elastic damping sleeve and the handle holder are layered in the radial direction, which allows a thin-walled construction. The play-related, positive securing the substantially rigid assembly of the handle holder and the handle housing to the also substantially rigid assembly of the mounting sleeve and the motor housing allows a free elastic, vibration damping relative deformation between the two rigid units and thus an effective vibration isolation. The playful positive locking secures the handle housing on the motor housing, without hindering the vibration decoupling. Due to the direct positive locking between the two aforementioned units can be dispensed with additional securing means. In particular, the vibration damper needs no geometrical adaptation to accommodate such security elements, which contributes to the reduction of its volume. The damping sleeve can be designed solely on the basis of the required damping effect, without being impaired in their function by separate security elements.
In einer vorteilhaften Ausführung übergreift das Griffgehäuse in einer Axialrichtung den Schwingungsdämpfer in Richtung des Motorgehäuses und ist mit Spiel direkt am Motorgehäuse gesichert. Hierbei besteht die Sicherungskette aus nur zwei Gliedern, nämlich dem Griffgehäuse und dem Motorgehäuse, während alle weiteren Glieder wie die Befestigungshülse, die Dämpfungshülse und der Griffhalter aus dieser Sicherungskette herausgenommen sind. Die erzielte Sicherungsfunktion beschränkt sich nicht nur auf Schäden in der Dämpfungshülse, sondern deckt auch Schäden an der Befestigungshülse oder am Griffhalter mit ab. Des weiteren führt die außenseitig übergreifende Anordnung des Griffgehäuses zu einer Schutzfunktion des Schwingungsdämpfers. Sämtliche Einzelkomponenten des Schwingungsdämpfers sind nach außen durch den übergreifenden Bereich des Griffgehäuses abgedeckt. Schmutz, Feuchtigkeit, UV-Strahlung oder andere nachteilige Umwelteinflüsse sind vom Schwingungsdämpfer ferngehalten.In an advantageous embodiment, the handle housing engages over the vibration damper in an axial direction in the direction of the motor housing and is secured with play directly on the motor housing. Here, the backup chain consists of only two members, namely the handle housing and the motor housing, while all other links such as the mounting sleeve, the damping sleeve and the handle holder are removed from this backup chain. The achieved safety function is not limited to damage in the damping sleeve, but also covers damage to the mounting sleeve or the handle holder from. Furthermore, the outside cross-arrangement of the handle housing leads to a protective function of the vibration damper. All individual components of the vibration damper are covered to the outside by the overlapping region of the handle housing. Dirt, moisture, UV radiation or other adverse environmental influences are kept away from the vibration damper.
In bevorzugter Weiterbildung weist das Motorgehäuse abseits der Befestigungshülse eine radial nach außen offene Umfangsnut auf, in die ein radial nach innen gerichteter Ringflansch des Griffgehäuses mit Spiel eingreift. Die Anordnung der Umfangsnut im Umfangsbereich des Motorgehäuses erzielt im Zusammenspiel mit dem Ringflansch eine hohe Tragfähigkeit. Befestigungshülse und Ringflansch bilden zusammen eine Labyrinthdichtung, die die abdeckende Schutzfunktion für den Schwingungsdämpfer steigert.In a preferred embodiment, the motor housing has a radially outwardly open circumferential groove away from the mounting sleeve into which a radially inwardly directed annular flange of the handle housing engages with play. The arrangement of the circumferential groove in the peripheral region of the motor housing achieved in conjunction with the annular flange a high Load capacity. Mounting sleeve and ring flange together form a labyrinth seal, which enhances the protective function covering the vibration damper.
In einer weiteren zweckmäßigen Ausführung weist der Griffhalter mindestens einen radial nach innen gerichteten Sicherungsvorsprung auf, der mit Spiel in eine Sicherungsaufnahme der Befestigungshülse eingreift. Unter Beibehaltung der platzsparenden koaxialen und in radialer Richtung geschichteten Bauweise erfolgt die Lagesicherung des Griffgehäuses gegenüber dem Motorgehäuse mittelbar durch direkte Wechselwirkung zwischen dem Griffhalter und der Befestigungshülse. Auch hier ist ein direkter, unmittelbarer und spielbehafteter Formschluß ohne zusätzliche Befestigungsglieder gegeben. Griffgehäuse und Motorgehäuse brauchen nicht in direkter sichernder Wechselwirkung zueinander stehen. Der Schwingungsdämpfer kann mit maximalem Radius zur Gerätelängsachse ringförmig im Bereich der Außenkontur von Motorgehäuse und Griffgehäuse angeordnet sein. Bei der koaxialen, radial geschichteten Bauweise übt der außenseitige, hülsenförmige Griffhalter eine Schutzfunktion auf die empfindliche Dämpfungshülse aus.In a further advantageous embodiment, the handle holder has at least one radially inwardly directed securing projection which engages with play in a securing receptacle of the fastening sleeve. While maintaining the space-saving coaxial and stratified in the radial direction construction, the position assurance of the handle housing relative to the motor housing takes place indirectly by direct interaction between the handle holder and the mounting sleeve. Again, there is a direct, immediate and game involving positive engagement without additional fasteners. Handle housing and motor housing need not be in direct securing interaction with each other. The vibration damper can be arranged with a maximum radius to the device longitudinal axis annular in the region of the outer contour of the motor housing and handle housing. In the coaxial, radially layered construction, the outside, sleeve-shaped handle holder exerts a protective function on the sensitive damping sleeve.
In bevorzugter Weiterbildung ist der Sicherungsvorsprung gemeinsam mit einem radialen Dämpfungsabschnitt der Dämpfungshülse von außen nach innen in die Sicherungsaufnahme hineingeführt, wobei der radiale Dämpfungsabschnitt das Spiel zwischen dem Sicherungsvorsprung und der Sicherungsaufnahme ausfüllt. Es handelt sich demnach um kein gänzlich freies Spiel, sondern um ein Spiel, welches durch die elastische Verformung des radial nach innen ragenden Dämpfungsabschnittes zugelassen wird. Spalte, Hohlräume oder dgl., in denen sich bewegungshindernd Schmutz festsetzen könnte, sind vermieden.In a preferred embodiment, the securing projection is guided together with a radial damping portion of the damping sleeve from outside to inside in the fuse holder, wherein the radial damping portion fills the game between the securing projection and the fuse holder. It is therefore not a completely free game, but a game that is allowed by the elastic deformation of the radially inwardly projecting damping section. Gaps, cavities or the like in which dirt could immobilize motion are avoided.
In bevorzugter Weiterbildung ist zwischen dem Griffhalter und dem Motorgehäuse in der Axialrichtung ein insbesondere umlaufender Spalt vorgesehen, aus dem eine Stoßkante der Dämpfungshülse radial über die Kontur des Griffhalters und des Motorgehäuses hervorsteht. Die Dämpfungshülse übt dabei eine Mehrfachfunktion aus. Das gummielastische, weiche Material der Dämpfungshülse verringert im Bereich der Stoßkante die Gerätebelastung bei äußeren Stoß- oder Schlagbelastungen. Die rutschhemmenden haptischen Eigenschaften des Dämpfermaterials steigern die Griffigkeit des Gerätegehäuses. Gleichzeitig wirkt die Stoßkante auch als Abdichtung im umlaufenden Spalt zwischen Motorgehäuse und Griffgehäuse, so daß das Eindringen von Schmutz und Feuchtigkeit wirksam vermieden ist. Alternativ oder zusätzlich kann auch eine über die Kontur des Griffhalters hervorstehende, außenseitig des Griffhalters angeordnete und insbesondere einteilig und materialeinheitlich mit der Dämpfungshülse ausgeführte Stoßkante vorgesehen sein, die zur Verbesserung der Griffigkeit und zur Verminderung von Stoßbelastungen beiträgt.In a preferred embodiment, a particular circumferential gap is provided between the handle holder and the motor housing in the axial direction, protruding from a shock edge of the damping sleeve radially beyond the contour of the handle holder and the motor housing. The damping sleeve exerts a multiple function. The rubber-elastic, soft material of the damping sleeve reduces the device load in the area of the impact edge in the event of external shock or impact loads. The slip-resistant haptic properties of the damper material increase the grip of the device housing. At the same time the abutting edge acts as a seal in the circumferential gap between the motor housing and the handle housing, so that the penetration of dirt and moisture is effectively prevented. Alternatively or additionally, a projecting beyond the contour of the handle holder, the outside of the handle holder arranged and in particular integrally formed and the same material with the damping sleeve abutting edge may be provided, which contributes to improving the grip and to reduce shock loads.
In zweckmäßiger Weiterbildung weist die Dämpfungshülse einen axialen Dämpfungsabschnitt auf, der in der Axialrichtung zwischen einer Stirnfläche des Halters und einer dem Motorgehäuse zugeordneten Stirnfläche liegt. Neben dem koaxial, radial geschichteten Abschnitt des Schwingungsdämpfers, der im Betrieb vorrangig einer Schubbeanspruchung unterliegt, ist auch ein Abschnitt geschaffen, der Zug- und Druckbeanspruchungen ausgesetzt ist. Es ist eine erhöhte Anzahl von Freiheitsgraden zur konstruktiven Anpassung des Schwingungs- und Dämpfungsverhaltens gegeben.In an expedient development, the damping sleeve has an axial damping section, which lies in the axial direction between an end face of the holder and an end face associated with the motor housing. In addition to the coaxial, radially stratified portion of the vibration damper, which is subject to a predominantly shear stress in operation, a section is created, which is subjected to tensile and compressive stresses. It is an elevated one Number of degrees of freedom for the structural adjustment of the vibration and damping behavior given.
In einer bevorzugten Ausführungsform ist die Baueinheit aus dem Griffhalter und der Dämpfungshülse in Form zweier fest miteinander verbundener Halbschalen ausgeführt. Insbesondere ist eine Teilungsebene der beiden Halbschalen bezogen auf die Axialrichtung in einem Winkel, insbesondere in 90° zu einer Teilungsebene von zwei Gehäuseschalen des Motorgehäuses angeordnet. Die verdrehte Anordnung beider Teilungsebenen zueinander erlaubt die Nutzung der beiden Halbschalen auch als Verbindungselement für die beiden Gehäuseschalen des Motorgehäuses. Der Montageaufwand ist verringert. Verschlissene Schwingungsdämpfer lassen sich durch einfaches Austauschen der als Einzelteile ausgeführten Halbschalen ersetzen. Eine Verbindung der beiden Halbschalen miteinander erfolgt zweckmäßig durch Verschraubung oder durch Aufschieben eines außenliegenden, umlaufenden Klemmringes.In a preferred embodiment, the assembly of the handle holder and the damping sleeve in the form of two firmly interconnected half shells. In particular, a dividing plane of the two half-shells with respect to the axial direction is arranged at an angle, in particular at 90 ° to a dividing plane of two housing shells of the motor housing. The twisted arrangement of both graduation planes to each other allows the use of the two half-shells as a connecting element for the two housing shells of the motor housing. The assembly costs are reduced. Worn vibration dampers can be replaced by simply replacing the half shells, which are designed as individual parts replace. A connection of the two half shells together is expediently by screwing or by pushing an external, circumferential clamping ring.
Ausführungsbeispiele sind im folgenden anhand der Zeichnung näher beschrieben. Es zeigen:
- Fig. 1
- in einer teilweise geschnittenen Seitenansicht eine erfindungsgemäße Handwerkzeugmaschine am Beispiel eines Winkelschleifers mit einer ersten Ausführungsform des Schwingungsdämpfers;
- Fig. 2
- eine perspektivische Explosionsdarstellung einer Gehäuseschale des Motorgehäuses nach
Fig. 1 im Bereich und des daran angrenzenden Schwingungsdämpfers; - Fig. 3
- die Einzelheit III nach
Fig. 1 mit Details zum Aufbau des koaxial aufgebauten und radial geschichteten Schwingungsdämpfers und einer direkten, den Schwingungsdämpfer umgreifenden Lagesicherung des Griffgehäuses am Motorgehäuse; - Fig. 4
- eine Explosionsdarstellung eines weiteren Ausführungsbeispiels der Erfindung mit einem Schwingungsdämpfer in Form von zwei separaten Halbschalen und einer Lagesicherung an der dem Motorgehäuse zugeordneten Befestigungshülse;
- Fig. 5
- eine Längsschnittdarstellung der Anordnung nach
Fig. 4 mit Einzelheiten zum Zusammenspiel der einzelnen Komponenten im Bereich des Schwingungsdämpfers; - Fig. 6
- eine Variante der Anordnung nach
Fig. 4 mit verschraubten Halbschalen des Schwingungsdämpfers; - Fig. 7
- eine Schnittdarstellung der Anordnung nach
Fig. 6 im Bereich des Schwingungsdämpfers mit Einzelheiten einer einteilig angeformten zusätzlichen Stoßkante.
- Fig. 1
- in a partially sectioned side view of a hand tool according to the invention using the example of an angle grinder with a first embodiment of the vibration damper;
- Fig. 2
- an exploded perspective view of a housing shell of the motor housing after
Fig. 1 in the area and the adjacent vibration damper; - Fig. 3
- the detail III after
Fig. 1 with details of the structure of the coaxially constructed and radially stratified vibration damper and a direct, the vibration damper encompassing position assurance of the handle housing on the motor housing; - Fig. 4
- an exploded view of another embodiment of the invention with a vibration damper in the form of two separate half-shells and a position assurance on the motor housing associated mounting sleeve;
- Fig. 5
- a longitudinal sectional view of the arrangement according to
Fig. 4 with details of the interaction of the individual Components in the area of the vibration damper; - Fig. 6
- a variant of the arrangement according to
Fig. 4 with bolted half shells of the vibration damper; - Fig. 7
- a sectional view of the arrangement according to
Fig. 6 in the area of the vibration damper with details of an integrally molded additional edge.
Im Betrieb erzeugen der Antriebsmotor und die Trennscheibe 32 Schwingungen, die sich auf das Motorgehäuse 1 und daran gehaltene Bauteile übertragen. Zur Abkopplung dieser Schwingungen vom Griffgehäuse 3 ist dieses mittels eines elastischen Schwingungsdämpfers 2 am Motorgehäuse 1 befestigt. Der gummielastische Schwingungsdämpfer 2 läßt eine schwingende Relativbewegung des Motorgehäuses 1 relativ zum Griffgehäuse 3 zu. Seine elastische Nachgiebigkeit ist derart ausgelegt, daß sich die Schwingungen nur deutlich verringert auf den Handgriff 3 übertragen. Hinzu kommt eine Dämpfungswirkung des im Schwingungsdämpfer 2 eingesetzten gummielastischen Materials.In operation, the drive motor and
Durch die relative Lage des Griffgehäuses 3 zum Motorgehäuse 1 ist eine Axialrichtung 7 vorgegeben, die im gezeigten Ausführungsbeispiel etwa parallel zur Längsachse 29 des Motorgehäuses 1 liegt. Das Griffgehäuse 3 übergreift in der Axialrichtung 7 den Schwingungsdämpfer 2 in Richtung auf das Motorgehäuse 1 und ist mit Spiel direkt am Motorgehäuse 1 gesichert. Weitere Einzelheiten hierzu sind im Zusammenhang mit den
Der Schwingungsdämpfer 2 ist vergleichbar zu einem in der Axialrichtung 7 liegenden Rohrabschnitt aufgebaut, der etwa koaxial zur Längsachse 29 angeordnet ist und nahe der Umfangskontur des Motorgehäuses 1 bzw. des Griffgehäuses 3 umläuft. Hierzu ist der Schwingungsdämpfer 2 aus einer dem Motorgehäuse 1 zugeordneten Befestigungshülse 4, einer koaxial die Befestigungshülse 4 umgreifenden elastischen Dämpfungshülse 5 und einem ebenfalls koaxial die Befestigungshülse 4 und die Dämpfungshülse 5 umgreifenden, dem Griffgehäuse 3 zugeordneten Griffhalter 6 aufgebaut. Der koaxiale Aufbau ist derart gewählt, daß die Befestigungshülse 4 und der Griffhalter 6 mit der zwischenliegenden Dämpfungshülse 5 radial von innen nach außen geschichtet aufgebaut sind. Das Griffgehäuse 3 ist mit dem Griffhalter 6 fest verbunden und bildet gemeinsam mit diesem eine Baueinheit, die bezogen auf die gummielastische Nachgiebigkeit der Dämpfungshülse insgesamt im wesentlichen starr ist. Vergleichbares gilt für die Baueinheit aus dem Motorgehäuse 1 und der sich stirnseitig vom Motorgehäuse 1 erhebenden Befestigungshülse 4, die ebenfalls bezogen auf die Nachgiebigkeit der Dämpfungshülse 5 im wesentlichen starr ist. Die schwingungsentkoppelnde und schwingungsdämpfende Relativbewegung zwischen beiden Bauteilen ist im wesentlichen auf die Verformung der Dämpfungshülse 5 beschränkt.The
Anstelle des hier gezeigten Winkelschleifers können auch andere vergleichbare Handwerkzeugmaschinen, insbesondere mit elektromotorischem Antrieb wie Bohrmaschinen oder dgl., vorgesehen sein.Instead of the angle grinder shown here, other comparable portable power tools, in particular with electric motor drive such as drills or the like. Be provided.
Bezogen auf die Axialrichtung 7 ist zwischen der Befestigungshülse 4 und dem Motorgehäuse 1 eine radial nach außen offene, kreisförmig umlaufende Umfangsnut 8 angeordnet, die in der Axialrichtung 7 zum Motorgehäuse 1 hin durch eine Stirnwand 35 und in Gegenrichtung zur Befestigungshülse 4 hin durch einen umlaufenden, äußeren Ringflansch 34 begrenzt ist.Based on the
Der Griffhalter 6 umfaßt einen zylindrischen Hülsenabschnitt 19, an den sich stirnseitig auf der dem Motorgehäuse 1 abgewandten Seite ein radial nach außen sich erhebender, umlaufender äußerer Ringflansch 36 anschließt. Die Befestigungshülse 4 und der Hülsenabschnitt 19 des Griffhalters 6 sind mit einer Anzahl von Durchbrüchen 20, 21 versehen. Entsprechend der Darstellung nach den
Der äußere Ringflansch 36 des Griffhalters 6 steht in radialer Richtung über das Material der Dämpfungshülse 5 hervor und greift spielfrei in eine innere Ringnut 37 des Griffgehäuses 3 ein. Der Griffhalter 6 ist separat zum Griffgehäuse 3 ausgeführt. Durch den spielfreien Eingriff des äußeren Ringflansches 36 in die innere Ringnut 37 ist eine im wesentlichen starre und unverrückbare Verbindung zwischen dem Griffgehäuse 3 und dem Griffhalter 6 hergestellt. Es kann auch eine Ausführung zweckmäßig sein, die eine veränderliche Drehwinkellage des Griffgehäuses 3 relativ zum Griffhalter 6 um die in
Der Darstellung nach
Separat zum Motorgehäuse 1 sind die beiden Halbschalen 22, 23 des Schwingungsdämpfers 2 ausgeführt, zwischen denen eine Teilungsebene 24 liegt. Die beiden Halbschalen 22, 23 sind jeweils einteilig als Zwei-Komponenten-Spritzgußbauteil separat vom Griffgehäuse 3 (
Im gezeigten Ausführungsbeispiel sind die beiden Sicherungsvorsprünge 10 gemeinsam mit einem radialen Dämpfungsabschnitt der Dämpfungshülse 5 von außen nach innen durch die Sicherungsaufnahme 11 hindurchgeführt. Der radial nach innen sich erhebende Dämpfungsabschnitt 12 der Dämpfungshülse 5 umschließt dabei den Sicherungsvorsprung 10 vollständig und ragt gemeinsam mit diesem bis ins Innere der Befestigungshülse 4 hinein. Der radiale Dämpfungsabschnitt 12 füllt das Spiel zwischen dem Sicherungsvorsprung 10 und der Sicherungsaufnahme 11 aus und läßt aufgrund seiner elastischen Nachgiebigkeit eine Relativbewegung der starren Baueinheit aus dem Motorgehäuse 1 und der Befestigungshülse 4 relativ zu der starren Baueinheit aus dem hier nicht gezeigten Griffgehäuse 3 (
Bezogen auf die Axialrichtung 7 ist zwischen dem Griffhalter 6 und dem Motorgehäuse 1 ein umlaufender Spalt 13 vorgesehen, der vom einteilig angeformten Material der gummielastischen Dämpfungshülse 5 ausgefüllt ist. Das Material der Dämpfungshülse 5 ist dabei derart ausgeformt, daß eine über die Kontur des Griffhalters 6 und des Motorgehäuses 1 hervorstehende, im Querschnitt gerundete umlaufende Stoßkante 14 gebildet ist. Gleichzeitig ist dadurch auch ein axialer Dämpfungsabschnitt 16 der Dämpfungshülse 5 gebildet, der elastisch federnd zwischen Stirnflächen 17, 18 des Motorgehäuses 1 bzw. des Griffhalters 6 liegt. Neben einer Dichtwirkung ist auch eine Aufnahme von in der Axialrichtung 7 wirkenden Druckspannungen gegeben. Des weiteren ist der in der Axialrichtung 7 durch die beiden Ringflansche 38, 39 und in der Radialrichtung durch die Umfangswand des Griffhalters 6 und die Befestigungshülse 4 begrenzte Raum zumindest näherungsweise vollständig mit dem Material der Dämpfungshülse 5 ausgefüllt. Dabei sind auch die beiden Ringflansche 38, 39 vollständig vom Material der Dämpfungshülse 5 umschlossen.Based on the
Der Darstellung nach
Unabhängig von der zuvor beschriebenen Haltefunktion der Halbschalen 22, 23 kann es auch vorteilhaft sein, in der hier gezeigen und auch in den weiteren offenbarten Ausführungsformen anstelle der beiden Gehäuseschalen 26, 27 (
Eine Außenfläche des Klemmrings 28 fluchtet etwa mit einer Außenfläche des Motorgehäuses 1 und des Griffgehäuses 3 (
Das hier nicht gezeigte, jedoch in
In den übrigen Merkmalen und Bezugszeichen stimmt das Ausführungsbeispiel nach den
Die
Der Längsschnittdarstellung nach
Claims (15)
- Hand-held machine tool with a motor housing (1) and a separate handle housing (3) mounted on the motor housing (1) by means of an elastic vibration damper (2) and positively secured thereto, wherein the vibration damper (3) is constructed of a mounting sleeve (4) assigned to the motor housing (1), an elastic damping sleeve (5) coaxially enclosing the mounting sleeve (4) and a handle holder (6) coaxially enclosing the mounting sleeve (4) and the damping sleeve (5) and assigned to the handle housing (3), the essentially rigid assembly comprising the handle holder (6) and the handle housing (3) being positively secured with play to the essentially rigid assembly comprising the mounting sleeve (4) and the motor housing (1),
characterised in that the damping sleeve (5) and the handle holder (6) are produced separately from the handle housing (3) as a 2-component injection moulding. - Hand-held machine tool according to claim 1,
characterised in that the handle housing (3) overlaps the vibration damper (3) in an axial direction (7) towards the motor housing (1) and is with play directly secured to the motor housing (1). - Hand-held machine tool according to claim 2,
characterised in that the side of the motor housing (1) which is remote from the mounting sleeve (4) is provided with a circumferential groove (8) which is open radially outwards and which is engaged with play by a radially inward-oriented annular flange (9) of the handle housing (3). - Hand-held machine tool according to claim 1,
characterised in that the handle holder (6) comprises at least one radially inward-oriented securing projection (10) engaging with play a securing recess (11) of the mounting sleeve (4). - Hand-held machine tool according to claim 4,
characterised in that the securing projection (10) is, together with a radial damping section (12) of the damping sleeve (5), inserted into the securing recess (11) from the outside, the radial damping section (12) filling the clearance between the securing projection (10) and the securing recess (11). - Hand-held machine tool according to claim 4 or 5,
characterised in that an in particular continuous gap (13), from which an abutting edge (14) of the damping sleeve (5) projects radially beyond the contour of the handle holder (6) and the motor housing (1), is provided in the axial direction (7) between the handle holder (6) and the motor housing (1). - Hand-held machine tool according to any of claims 4 to 6,
characterised in that an abutting edge (15) projecting beyond the contour of the handle holder (6), located outside the handle holder (6) and in particular produced integral with and from the same material as the damping sleeve (5) is provided. - Hand-held machine tool according to any of claims 1 to 7,
characterised in that the damping sleeve (5) has an axial damping section (16) located in the axial direction (7) between an end face (17) of the handle holder (6) and an end face (18) assigned to the motor housing (1). - Hand-held machine tool according to any of claims 1 to 8,
characterised in that the damping sleeve (5) and the mounting sleeve (4) are, in particular together with the motor housing (1), produced as a single-piece 2-component injection moulding. - Hand-held machine tool according to claim 9,
characterised in that the damping sleeve (5), the handle holder (6) and the mounting sleeve (4) are produced as a single-piece 2-component injection moulding, wherein a sleeve section (19) of the handle holder (6) and the mounting sleeve (4) are enclosed by the material of the damping sleeve (5) on both sides in the radial direction, and wherein the sleeve section (19) and the mounting sleeve (4) have holes (20, 21) filled with the material of the damping sleeve (5). - Hand-held machine tool according to any of claims 1 to 10,
characterised in that the assembly comprising the handle holder (6) and the damping sleeve (5) are designed as two half-shells (22, 23) which are permanently joined together. - Hand-held machine tool according to claim 11,
characterised in that a joint face (24) of the two half-shells (22, 23) extends at an angle, in particular at right angles, relative to the axial direction (7) in relation to a joint face (25) of two half-shells (26, 27) of the motor housing (1). - Hand-held machine tool according to claim 11 or 12,
characterised in that the two half-shells (22, 23) are bolted to one another. - Hand-held machine tool according to claim 11 or 12,
characterised in that the two half-shells (22, 23) are joined to one another by an external, continuous clamping ring (28). - Hand-held machine tool according to any of claims 1 to 14,
characterised in that the handle housing (3) is rotatable relative to the handle holder (6).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/EP2005/011601 WO2007048435A1 (en) | 2005-10-29 | 2005-10-29 | Portable power tool |
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EP1940594A1 EP1940594A1 (en) | 2008-07-09 |
EP1940594B1 true EP1940594B1 (en) | 2009-07-08 |
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EP05806448A Active EP1940594B1 (en) | 2005-10-29 | 2005-10-29 | Portable power tool |
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EP (1) | EP1940594B1 (en) |
CN (1) | CN101282822B (en) |
DE (1) | DE502005007679D1 (en) |
WO (1) | WO2007048435A1 (en) |
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-
2005
- 2005-10-29 CN CN2005800517996A patent/CN101282822B/en not_active Expired - Fee Related
- 2005-10-29 EP EP05806448A patent/EP1940594B1/en active Active
- 2005-10-29 WO PCT/EP2005/011601 patent/WO2007048435A1/en active Application Filing
- 2005-10-29 DE DE502005007679T patent/DE502005007679D1/en active Active
- 2005-10-29 US US12/091,649 patent/US8496073B2/en not_active Expired - Fee Related
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CN101282822B (en) | 2010-05-12 |
WO2007048435A1 (en) | 2007-05-03 |
US20080223594A1 (en) | 2008-09-18 |
CN101282822A (en) | 2008-10-08 |
US8496073B2 (en) | 2013-07-30 |
DE502005007679D1 (en) | 2009-08-20 |
EP1940594A1 (en) | 2008-07-09 |
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