EP1867443B1 - Poignée supplémentaire d'une machine-outil manuelle - Google Patents

Poignée supplémentaire d'une machine-outil manuelle Download PDF

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Publication number
EP1867443B1
EP1867443B1 EP07010000A EP07010000A EP1867443B1 EP 1867443 B1 EP1867443 B1 EP 1867443B1 EP 07010000 A EP07010000 A EP 07010000A EP 07010000 A EP07010000 A EP 07010000A EP 1867443 B1 EP1867443 B1 EP 1867443B1
Authority
EP
European Patent Office
Prior art keywords
securing
auxiliary handle
section
projections
damping 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.)
Active
Application number
EP07010000A
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German (de)
English (en)
Other versions
EP1867443A1 (fr
Inventor
Rainer Kumpf
Thomas Robieu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Techtronic Industries GmbH
Original Assignee
AEG Electric Tools GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AEG Electric Tools GmbH filed Critical AEG Electric Tools GmbH
Priority to EP07010000A priority Critical patent/EP1867443B1/fr
Priority to US11/762,245 priority patent/US20070289761A1/en
Publication of EP1867443A1 publication Critical patent/EP1867443A1/fr
Application granted granted Critical
Publication of EP1867443B1 publication Critical patent/EP1867443B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle

Definitions

  • the invention relates to an additional handle of a hand-held machine tool having the features according to the preamble of claim 1.
  • Hand-held machine tools such as angle grinders, polishing machines, drills or the like have a main handle, which is integrally formed or attached to a motor housing or the like. The machine tool is grasped and guided by the main handle.
  • an additional handle for the other hand of the user.
  • Such an additional handle is releasably attached, for example, on the gear housing of the machine tool. Run as a handle handle he stands out radially to the longitudinal axis of the machine tool and facilitates the leadership in difficult machining tasks.
  • an additional handle is from the DE 100 29 536 A1 known.
  • an at least partially exposed disc-shaped damping element is provided as a connection between a handle part and a fastening part.
  • a wire rope, a playful screw or the like serve as a securing element, which on the one hand allows a limited elastic deformation and on the other hand prevents damage to the damping element tearing off the handle part.
  • the arrangement of the additional securing element results in additional costs and additional weight.
  • the elastic damping element is exposed unprotected external influences.
  • a vibration isolating handle construction in which a main handle is formed with a holding portion by two bolted half shells.
  • the two half-shells of the holding section enclose a securing portion of the machine tool with play.
  • a total of eight damping elements arranged to bring about a vibration isolation.
  • the construction is complicated and costly in the production and assembly.
  • the arrangement of the large number of individual damping elements to support the main handle in all spatial movement degrees of freedom requires a large space, which limits the mobility of the machine tool when used in an additional handle.
  • An adaptation of different stiffnesses and damping properties for different degrees of freedom of movement is difficult. Depending on the load direction, only a part of the damping elements is always loaded. The other damping elements do not contribute to the damping effect.
  • the invention has the object of developing a generic auxiliary handle such that a simple and secure vibration-damped connection between the handle part and the fastening part is given.
  • an additional handle of a hand-held machine tool wherein the holding portion and the securing portion are each formed integrally, wherein the holding portion engages around the securing portion form-fitting manner on all sides forming a damping space with all-round play.
  • the damping element fills the damping chamber at least partially and preferably completely.
  • the term chosen here for the universal encompassing means that encompassing in all spatial directions is provided, although a hermetic enclosing possible, but not required.
  • each of the holding portion and the securing portion improves the carrying capacity with reduced manufacturing and assembly costs. Since the damping element fills the damping chamber, it is charged as a whole due to a relative damping movement, wherein the existing damping material is used in its entirety for the damping effect. With high load capacity, a significantly more compact design can be achieved over the prior art, which contributes to improved handling of the machine tool due to the reduced construction volume and the reduced weight.
  • the holding portion, the securing portion and the damping element may be expedient to manufacture as individual parts, wherein the damping element is knotted or glued, for example, in the damping chamber.
  • the damping element, the holding portion and the securing portion are formed as a multi-component injection molded part. With low manufacturing and assembly costs creates an intimate connection between the three components. The individual materials adhere to one another, so that at the contact surfaces not only compressive stresses but also tensile and and shear stresses can be transmitted. This ensures that the existing damping material in its entirety contributes to the damping effect.
  • the securing portion engages in the absence of damping element captive in the holding section. If the damping element is damaged or even destroyed, the handle can not solve even with complete absence of the damping element of the machine tool, which contributes to the reliability of the machine tool.
  • the securing portion has at least two and preferably three circumferentially spaced, radially outwardly projecting securing projections.
  • the holding portion has a peripheral wall which limits the damping space in the radial direction, wherein the peripheral wall has securing openings assigned to the securing projections.
  • the securing projections engage in the securing openings with an all-round distance to edges of the securing openings.
  • the distance between the securing projections and the edges of the securing openings is filled with the material of the damping element.
  • the peripheral wall and a front and a rear wall of the holding section limit the lateral and also the pivoting degrees of freedom of movement.
  • the interplay of securing projections with The edges of the securing holes and the intermediate material of the damping element also contributes to the adjustment of the stiffness and damping behavior in relative pivoting and torsional movement.
  • the intermediate damping material in each direction prevents individual components such as the securing projections from striking the retaining portion.
  • the securing openings also allow a visual inspection of the damping element, so that damage, signs of wear and the like can be detected in good time.
  • the holding section and the securing section are made non-detachable as two separate individual parts in a common injection process.
  • two items are manufactured, which engage inextricably meshed, which is achieved without additional installation effort, the desired captive mutual position assurance.
  • the securing portion engages with the securing projections in a bayonet-like manner into the holding section with retaining projections.
  • the securing section is inserted axially into the holding section.
  • the securing projections are arranged in the circumferential direction in each case at the same distance from each other.
  • an isotropic, ie direction-independent stiffness and damping behavior can be set.
  • it does not depend on the angular position of the auxiliary handle when screwing. There are no additional measures required to set a specific rotation angle position.
  • the holding section on the fastening part and the securing section on the handle part.
  • an assembly of the holding portion and a handle tube of the handle part is made in one piece.
  • the material of the elastic damping element is in particular in one piece at least partially around the handle tube and preferably at least partially guided around the outside of the holding section. Without additional manufacturing and assembly work, the feel of the auxiliary handle is improved. At the same time, the external effect Material of the damping element as shock or shock absorber against external loads.
  • Fig. 1 shows a perspective view of an inventively designed additional handle, which is provided for a hand-held machine tool, in particular an angle or edge grinder, a polishing machine, a drill or the like.
  • the auxiliary handle shown comprises a handle part 1, which is enclosed in the operation of the user's hand.
  • Other parts of the auxiliary handle are a fixing part 2 and an elastic Damping element 3, with which the handle part 1 is fastened vibration-damping on the fastening part 2.
  • auxiliary handle 1 Coaxial with the auxiliary handle 1 protrudes a screw 18 with a thread out of the mounting part 2 and is provided for screwing the auxiliary handle with the machine tool.
  • the longitudinal axis of the auxiliary handle In normal operating position, the longitudinal axis of the auxiliary handle is radially to the longitudinal axis of the machine tool and can be aligned laterally, up or down and in any intermediate positions depending on the application.
  • the screwing of the auxiliary handle with the machine tool is carried out regularly near the driven tool, in particular in the region of a transmission housing.
  • the screw 18 engages centrally and coaxially through a hub 19 of the fastening part 2, to which a planar, in the radial and circumferentially extending securing portion 5 is integrally formed.
  • the hub 19 and the securing portion 5 together form the fastening part 2.
  • the handle part 1 comprises an approximately cylindrically shaped handle tube 16, which merges in the region of the fastening part 2 in a cylindrical, in the radial direction relative to the handle tube 16 extended holding portion 4.
  • the attachment of the handle part 1 by means of the damping element 3 on the fastening part 2 takes place in the region of the holding portion 4 and the securing portion 5.
  • the axially opposite free end of the handle tube 16 is unsupported, therefore, the attachment of the auxiliary handle on the Machine tool alone via the screw 18 takes place.
  • the construction shown here is also referred to as a handle handle.
  • the holding section 4 is approximately drum-shaped and comprises an at least approximately cylindrical peripheral wall 12, to the handle tube 16 toward a rear wall 11 and the screw 18 and the machine tool, not shown, a front wall 25 connects.
  • the rear wall 11 and the front wall 25 are approximately circular in shape and in this case have a slightly conical shape.
  • the holding section 4 with the peripheral wall 12, the rear wall 11 and the front wall 25 is made in one piece from injection-molded plastic.
  • In the peripheral wall are preferably at least two and in the illustrated embodiment a total of three securing openings 23 formed, which extend partially into the rear wall 11 and into the front wall 25 in.
  • the securing portion 5 has at least two and in the embodiment shown, three circumferentially spaced, radially outwardly projecting securing projections 6, which are associated with the securing openings 23, and which engage in the securing openings 23 at all sides to edges 24 of the securing openings 23.
  • the securing portion 5 is made in one piece from injection-molded plastic together with the three securing projections 6.
  • the one-piece holding portion 4 surrounds the one-piece securing portion 5 on all sides to form one in connection with the FIGS. 2 and 3 described damping chamber 13 with all-round play.
  • the one-piece running damping element 3 fills the damping chamber 13 ( Fig. 2, 3rd ) completely off.
  • the integrally formed with the handle tube 16 holding portion 4, the securing portion 5 and the damping element 3 are made in a single operation as a multi-component injection molded part in the manner described in more detail below.
  • Fig. 2 shows an exploded view of the auxiliary handle after Fig. 1 It can be seen that the peripheral wall 12, the rear wall 11 and the front wall 25 of the holding section 4 delimit the damping chamber 13.
  • the securing projections 6 of the securing section 5 shown as a separate item have a circular-segment-shaped outer edge whose radius corresponds approximately to the radius of the peripheral wall 12 of the holding section 4. Contrary to the exploded view Fig. 2 From this and from the circumferentially closed construction of the rear wall 11 and the front wall 25 results despite the securing openings 23, the securing section 5 in the operating position after Fig. 3 is held captive in the holding portion 4 at damaged or even missing damping element 3. Furthermore, it can be seen that the securing projections 6 and the securing openings 23 are arranged in the circumferential direction in each case at the same distance from each other and evenly distributed.
  • Fig. 3 shows a longitudinal sectional view of the auxiliary handle after the Fig. 1 and 2 with details of the interaction of the items. It can be seen that the damping chamber 13 is completely filled without gaps and cavities from the damping element 3. Between a radially inner, circumferential edge of the front wall 25 and the hub 19 of the securing portion 5, a circumferential gap 27 is formed, which is filled by the material of the damping element 3. Furthermore, it can be seen that the securing portion 5 in all spatial directions to the holding portion 4, ie the peripheral wall 12, the rear wall 11 and the front wall 25 has a clearance or a game. This distance forming the damping chamber 13 specifies the contour of the damping element 3.
  • the longitudinal section is after Fig. 3 it can be seen that the securing projection 6 projecting through the securing opening 23 has a spacing, which is continuous with the edges 24 of the respective securing opening 23, in the circumferential direction, this distance being filled with the material of the damping element 3.
  • the material of the elastic damping element 3 is guided in one piece at least partially around the handle tube 16 on the outside, thereby forming a soft envelope 17.
  • Fig. 2 illustrated ribs 26 made of the harder and stiffer material of the handle tube 16 and contribute to the feel of the handle tube 16 at.
  • the material of the elastic damping element 3 comparable for illustration Fig. 7 at least partially around the holding section 4 on the outside.
  • the screw 18 is as shown Fig. 3 provided with an outside structure, which is encapsulated by the material of the hub 19. As a result, the screw 18 is held inextricably in the hub 19. But it can also be another connection of the screw 18 with the hub 19, for example, accordingly Fig. 7 be appropriate.
  • the 4 and 5 show a plan view of the holding portion and a cross-sectional view of the securing portion after the Fig. 1 to 3 with details of joint demolding in manufacturing as a multi-component injection molded part. Deviating from the exploded view after Fig. 2 Both the holding portion 4 and the securing portion 5 together in the position as shown Fig. 3 injected. For this purpose, 23 mold slides are introduced at the location of the later securing openings, which collide at parting lines 28. These mold slides together limit the mold cavities both for the holding section 4 and the securing section 5. After completion of the injection molding process, they are pulled apart parallel to inner surfaces of the peripheral walls 12 according to arrows 29. There remain the holding portion 4 and the securing portion 5 as two separate, but insoluble as shown in the FIGS. 2 and 3 interconnected, interlocking items.
  • Fig. 6 In addition to the presentation after Fig. 3 is the cross-sectional view after Fig. 6 can be seen that the engaging in the securing openings 23 securing projections 6 not only to the upper and lower, circumferentially extending edges 24, but also to the axially parallel, circumferentially adjacent to the securing projections 6 edges 24 of the securing openings 23 have a distance which is filled by the material of the damping element 3. As a result, and by the position of the damping element 3 in the radial direction between the securing portion 5 and the peripheral wall 12 of the holding portion 4 is a damped rotation of both parts against each other.
  • Fig. 7 shows a cross-sectional view of another inventively designed additional handle. Unless otherwise stated, the embodiments according to the Fig. 1 to 6 as well as after FIGS. 7 and 8 in their features and reference numerals match.
  • the one-piece molded plastic molded to the handle tube 16 holding portion 4 has the contour of about a cylindrical drum and includes on the opposite side in the axial direction of the screw 18 a circular disk-shaped rear wall 11 and an adjoining cylindrical peripheral wall 12. On the in the axial direction The screw 18 facing end face, starting from the peripheral wall 12, a number of retaining projections 7 radially inwardly out. In the radial direction, they extend further inward, as the outer diameter of securing projections 6 of the securing portion 5 is.
  • the securing portion 5 engages with its radially outwardly projecting securing projections 6 with all-round play to form a damping chamber 13 in the holding portion 4 a.
  • the damping chamber 13 is therefore limited in the radial direction by the peripheral wall 12, in the direction away from the screw 18 axial direction of the rear wall 11 and in the opposite, pointing in the direction of the screw 18 axial direction of the retaining projections 7.
  • the securing projections 6 are in the axial direction on the one hand with the retaining projections 7 and on the other hand with the rear wall 11 in registration.
  • the handle part 1 is therefore secured in the axial and radial directions and in the tilting direction in a form-fitting manner to the securing projections 6 of the fastening part 2.
  • the damping chamber 13 is integrally molded with the material of the elastic damping element 3 and completely. This allows an elastic and vibration-damped relative movement of the handle part 1 relative to the fastening part 2, but this relative movement is limited by the elastic deformability of the damping element 3 in conjunction with the interplay between the holding portion 4 and the securing portion 5. In the event of damage to the damping element 3, the positive engagement of the securing section 5 in the holding section 4 prevents complete detachment of the grip part 1 from the fastening part 2.
  • an injection-molded PU polymer or TPE polymer is selected by way of example. In the exemplary embodiment shown, this material is integrally drawn completely around the holding section 4 and also around the handle tube 16 by means of injection molding. For the handle tube 16 and the holding section 4, a stiffer, impact-resistant plastic material is selected. The assembly of the holding section 4 and the handle tube 16 is integrally molded from this plastic material.
  • Fig. 8 shows a perspective view of the auxiliary handle after Fig. 7 in the assembled state, wherein the damping element 3 is shown to illustrate the interaction between the holding portion 4 and the securing portion 5 is transparent.
  • the damping element 3 is shown to illustrate the interaction between the holding portion 4 and the securing portion 5 is transparent.
  • Fig. 7 are the same features provided with the same reference numerals.
  • the perspective view Fig. 8 It can be seen that the cylindrical peripheral wall 12 and an axial direction of the screw 18 facing end face 20 of the holding portion 4 is interrupted by a total of four equally large spaces 15. Accordingly, a number of a total of four holding projections 7 are formed by the remaining parts of the peripheral wall 12 and the end face 20, which are in the circumferential direction at the same distance from each other. The circumferential extent of the holding projections 7 and the intermediate spaces 15 is the same for all four retaining projections 7.
  • the retaining projections 7 initially start from the rear wall 11 and extend in the axial direction towards the screw 18. In their further course, they are radially inward angled, so stand out from the peripheral wall 12 radially inwardly in the direction of the central axis of the auxiliary handle.
  • securing projections 6 and retaining projections 7 shown may also be a different number appropriate, preferably at least two and in particular at least three securing projections 6 and holding projections 7 are provided , In any case, an equal number of securing projections 6 and retaining projections 7 to choose.
  • the fastening part 2 is rotated about its longitudinal axis such that the securing projections 6 lie in the axial direction in register with the intermediate spaces 15 of the retaining projections 7.
  • the circumferential direction are located between the equally spaced securing protrusions 6 also with the same distance from one another interspaces 14 which lie in the twisted mounting position in the axial direction in registration with the retaining projections 7.
  • the securing section 5 with its securing projections 6 are axially inserted into the holding section 4 so far that the securing projections 6 lie in the axial direction between the holding projections 7 and the rear wall 11.
  • a relative deformation of the handle part 1 relative to the fastening part 2 in the radial, axial or tilting direction is at least one of the damping sections 8, 9, 10 pressure-loaded, wherein the elastic compliance is limited. It is determined on the one hand by the non-linear compression spring behavior of the elastomer material from the damping element 3. On the other hand, the deformation is limited by the in the axial and radial direction complete encompassing of the securing portion 5 and the damping element 3 by means of the holding portion 4.
  • the holding portion 4 is assigned to the fastening part 2 and surrounds the damping element 3 and the securing portion 5 of the handle part. 1

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

Claims (11)

  1. Poignée supplémentaire d'une machine manuelle, en particulier d'une meuleuse d'angle ou d'une tronçonneuse à meule, d'une machine à polir, d'une perceuse ou d'une machine similaire, comprenant un élément de préhension (1) destiné à être entouré par la main de l'utilisateur, et un élément de fixation côté machine (2), l'élément de préhension (1) étant relié par l'intermédiaire d'un élément amortisseur élastique (3) à l'élément de fixation (2) et étant bloqué par complémentarité de forme sur celui-ci,
    caractérisée en ce qu'une partie de fixation réalisée d'une seule pièce (4) entoure par complémentarité de forme une partie de blocage réalisée d'une seule pièce (5), de tous les côtés, en formant un espace d'amortissement (13) avec un jeu de tous les côtés, et en ce que l'élément amortisseur (3) remplit au moins en partie l'espace d'amortissement (13).
  2. Poignée supplémentaire selon la revendication 1, caractérisée en ce que l'élément amortisseur (3), la partie de fixation (4) et la partie de blocage (5) sont conçus comme une pièce moulée par injection à plusieurs composants.
  3. Poignée supplémentaire selon la revendication 1 ou 2, caractérisée en ce que la poignée de blocage (5), en l'absence d'élément amortisseur (3), est enclenchée de manière imperdable dans la partie de fixation (4).
  4. Poignée supplémentaire selon la revendication 3, caractérisée en ce que la partie de blocage (5) présente au moins deux et de préférence trois saillies de blocage (6) qui sont espacées les unes des autres dans le sens circonférentiel et qui dépassent radialement vers l'extérieur, et en ce que la partie de fixation (4) comporte une paroi périphérique (12) qui limite l'espace d'amortissement (13) dans le sens radial, la paroi périphérique (12) présentant des ouvertures de blocage (23) associées aux saillies de blocage (6), et les saillies de blocage (6) s'enclenchant dans les ouvertures de blocage (23) à une certaine distance, de tous les côtés, de bords (24) des ouvertures de blocage (23).
  5. Poignée supplémentaire selon la revendication 4, caractérisée en ce que la distance entre les saillies de blocage (6) et les bords (24) des ouvertures de blocage (23) est remplie avec la matière de l'élément amortisseur (3).
  6. Poignée supplémentaire selon l'une des revendications 1 à 5, caractérisée en ce que la partie de fixation (4) et la partie de blocage (5) sont fabriquées en une opération d'injection commune, sous la forme de deux éléments séparés et de manière à être imperdables.
  7. Poignée supplémentaire selon la revendication 1 ou 2, caractérisée en ce que la partie de blocage (5) s'enclenche avec des saillies de blocage (6), comme un élément à baïonnette, dans la partie de fixation (4) pourvue de saillies de fixation (7).
  8. Poignée supplémentaire selon l'une des revendications 4 à 7, caractérisée en ce que les saillies de blocage (6) sont disposées à intervalle régulier dans le sens circonférentiel.
  9. Poignée supplémentaire selon l'une des revendications 1 à 8, caractérisée en ce que la partie de fixation (4) est disposée sur l'élément de préhension (1) tandis que la partie de blocage (5) est disposée sur l'élément de fixation (2).
  10. Poignée supplémentaire selon la revendication 9, caractérisée en ce qu'une unité de construction est réalisée d'une seule pièce à partir de la partie de fixation (4) et d'un tube de préhension (16) de l'élément de préhension (1).
  11. Poignée supplémentaire selon l'une des revendications 1 à 10, caractérisée en ce que la matière de l'élément amortisseur élastique (3) fait le tour, en particulier d'une seule pièce, au moins partiellement du côté extérieur du tube de préhension (16) et de préférence au moins partiellement de la partie de fixation (4).
EP07010000A 2006-06-14 2007-05-19 Poignée supplémentaire d'une machine-outil manuelle Active EP1867443B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07010000A EP1867443B1 (fr) 2006-06-14 2007-05-19 Poignée supplémentaire d'une machine-outil manuelle
US11/762,245 US20070289761A1 (en) 2006-06-14 2007-06-13 Auxiliary Handle for a Hand-Held Power Tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06012213 2006-06-14
EP07010000A EP1867443B1 (fr) 2006-06-14 2007-05-19 Poignée supplémentaire d'une machine-outil manuelle

Publications (2)

Publication Number Publication Date
EP1867443A1 EP1867443A1 (fr) 2007-12-19
EP1867443B1 true EP1867443B1 (fr) 2009-07-15

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EP07010000A Active EP1867443B1 (fr) 2006-06-14 2007-05-19 Poignée supplémentaire d'une machine-outil manuelle

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US (1) US20070289761A1 (fr)
EP (1) EP1867443B1 (fr)

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Publication number Priority date Publication date Assignee Title
US11872683B2 (en) 2021-06-07 2024-01-16 Black & Decker Inc. Side handle for power tool
US11931879B2 (en) 2021-06-07 2024-03-19 Black & Decker Inc. Power tool dual-trigger operation

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