EP0710527B1 - Handtool for machining surfaces - Google Patents

Handtool for machining surfaces Download PDF

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Publication number
EP0710527B1
EP0710527B1 EP95118775A EP95118775A EP0710527B1 EP 0710527 B1 EP0710527 B1 EP 0710527B1 EP 95118775 A EP95118775 A EP 95118775A EP 95118775 A EP95118775 A EP 95118775A EP 0710527 B1 EP0710527 B1 EP 0710527B1
Authority
EP
European Patent Office
Prior art keywords
toolholder
sanding plate
hand
power tool
held power
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.)
Expired - Lifetime
Application number
EP95118775A
Other languages
German (de)
French (fr)
Other versions
EP0710527A3 (en
EP0710527A2 (en
Inventor
Steffen Dipl.-Ing. Wünsch
Joao Dipl.-Ing. Bergner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Priority claimed from DE4303044A external-priority patent/DE4303044A1/en
Priority to DE4303044A priority Critical patent/DE4303044A1/en
Priority to DE9320393U priority patent/DE9320393U1/en
Priority to EP94101587A priority patent/EP0610801B2/en
Priority to DE59410331T priority patent/DE59410331D1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0710527A2 publication Critical patent/EP0710527A2/en
Publication of EP0710527A3 publication Critical patent/EP0710527A3/en
Priority to US08/740,315 priority patent/US5967886A/en
Publication of EP0710527B1 publication Critical patent/EP0710527B1/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor

Definitions

  • US 3 160 995 is a hand tool for edge-to-edge Sanding surfaces, especially in corners or along of grooves, known.
  • the hand machine tool has one Sanding disc with a triangular base. Whose labor movement takes place around a fixed, normal to the base Swiveling axis back and forth.
  • the angle of the corner in the front of the sanding plate is smaller than 90 °, so that the sanding disc is Areas of corners or fillets near the edge for grinding can be used.
  • the edges of the grinding tool are curved, as also known for irons, for flush-fitting Grinding in hard-to-reach places.
  • the one designed as an equilateral triangle with curved side edges Like all others, the grinding plate has a floor plan Triangles, three corner angles, each less than 90 °.
  • hand tools are rectangular Grinding disc known, which by means of an eccentric drive, a bound, circular motion. These hand machine tools are referred to as orbital sanders, although you Tool does not actually perform a swinging movement.
  • FIG. 1 shows the side view of an inventive Hand machine tool
  • Figure 2 is a plan view of the hand machine tool
  • 3 shows an enlarged detail the front area of the hand tool according to FIG. 1
  • 4 shows a plan view of the tool holder
  • FIGS. 5 and 6 Oscillating elements of the tool holder according to Figure 4
  • Figure 7 a Side view of Figure 4, in particular the vibrating elements
  • Figure 8 is a view of the grinding plate from below
  • FIG. 9 is a Side view of the grinding plate, according to Figure 8, in section, figure 10 a bellows to be coupled to the tool holder Dust extraction, Figure 11 is a side view of the tool holder from the side of the bellows, Figure 12 is a view of the Tool holder from below, Figure 13 is a plan view of another Embodiment of a grinding plate, Figure 14 the Side view of the grinding plate according to FIG. 13.
  • the electrical hand machine tool shown in FIG. 1 is designed as an orbital sander 1, which has a machine housing 2 in which a motor 3 is arranged.
  • the orbital sander 1 carries an on and off switch 4 at the top, in particular for operation with the thumb.
  • a motor control adjusting wheel 5 is arranged in the rear area of the machine housing 2.
  • An electrical connection line 6 with a protective sleeve 7 emerges from the rear of the machine housing 2.
  • the orbital sander 1 carries a sanding plate 8 with a Velcro fastener 8 ' for receiving sanding sheets (not shown), which is detachably attached to a tool holder 9 in a latching manner.
  • Rotations of the motor 3 are transmitted to the tool holder 9 and thus to the grinding plate 8 by a flexible shaft 10, which is guided in the machine housing 2 via a lateral vibration limitation 11.
  • the flexible shaft 10 ends at one end in an eccentric support 120 which carries an eccentric pin 12 and which is rotatably supported in a crankshaft-like manner via a needle bearing 13 on the tool holder 9 and via a lower roller bearing 14 on the machine housing 2 near the tool holder 9.
  • the flexible shaft 10 is coupled to a motor shaft (not explained in more detail) via a plug-in coupling 15.
  • the flexible shaft 10 is rotatably mounted in an upper roller bearing 16 in the machine housing 2.
  • the tool holder 9 is secured via two leaf spring-like oscillating elements 17, 18 on the machine housing 2 against loss and against rotation.
  • a mouth 19 for dust discharge on the tool holder 9 and a dust removal duct 20 in the machine housing 2 is as elastic connecting element a bellows 21 arranged, through the unimpeded circular movement of the tool holder 9 dust can flow out.
  • the tool holder 9 carries an operating button 22 which is easily accessible from the front or from above and which can be moved to the rear and is integrally connected to a latch 23.
  • latch 23 engages in a locking hook 24 of the grinding plate 8 and thereby holds the grinding plate 8 on the tool holder 9.
  • FIG. 3 the machine housing 2, the tool holder 9, the grinding plate 8 with the dust extraction openings 47 , the flexible shaft 10, the rear and front oscillating elements 17, 18, which hold the tool holder 9 with the grinding plate 8 hold elastically with respect to the machine housing 2 , the bellows 21, the lower roller bearing 14 and the eccentric pin 12 arranged on the eccentric carrier 120.
  • a needle bearing 13 between the tool holder 9 and the eccentric pin 12 is designated, as well as one on the eccentric pin 12 arranged balancing mass 30 to reduce the imbalance occurring during the eccentric movement of the tool holder 9 with grinding plate 8.
  • the configuration of the shell-like tool holder 9 and the control button 22 also become clear:
  • the control button 22 is displaceably supported against the force of a compression spring 31.
  • the control button 22 On the side facing the grinding plate 8, the control button 22 has a recess 32, the left-hand contour of which has two inclined surfaces 33, 34 which form a beak-like tip.
  • This tip is opposite a similar tip of a latching hook 24, which is formed in one piece from a fixed sanding plate 35.
  • the locking hook 24 carries two counter bevels 36, 37.
  • the upper inclined surface 33 of the bolt 23 or the control button 22 hooks and braces, engaging under the locking hook 24, against the lower counter bevel 37 and thus stabilizes the locking of the grinding plate 8 on the tool holder 9, so that in the tensioned state the grinding plate 8 is pressed firmly against the tool holder 9.
  • the operating button 22 does not have to be moved backwards by the action of the lower inclined surface 34 when mounting the grinding plate 8 on the tool holder 9, since the latching hook 24 slides on the bolt 23, automatically pushes it back and latches.
  • the control button 22 is moved rearward, so that the bolt 23 with respect to the latching hook 24 is removed from the latching position to such an extent that the tips thereof release one another.
  • the grinding plate can now be pivoted and removed around the rear edge in the area of the engagement openings 39, 40 (FIG. 4) relative to the tool holder 9, an unintentional loosening of the grinding plate 8 by the position of the tool holder 9 integrated or reset in the contour of the tool holder Control button 22 and its return spring 31 can be excluded .
  • FIG 4 the top view of the tool holder 9 is shown with the vibrating elements 17, 18 and the mouth 19 of the dust removal channel 20 and with two engagement openings 39, 40 for engaging the support claws 48, 49, 50, 51, 52, 53, with which the grinding plate 8 holds on to the tool holder 9. Furthermore, the opening 41 for engaging the needle bearing 13 or for the eccentric pin 12 and in the front corner 42 the opening 43 for receiving the control button 22 are shown.
  • FIGS. 5 and 6 show the vibrating elements as a detail 17, 18 shown. It is clear from this that the rear vibrating element 17 is a pair of three individual vibrating columns and that Front vibrating element 18 consists of four individual vibrating columns.
  • FIG. 7 illustrates the arrangement of the oscillating elements 17, 18 on the tool holder 9 and shows in the side view of the figure 4 along the section line of the arrows Y-Y the T-profile of the Swinging elements 17, 18 with their upper cross blades in corresponding, not specified recesses of the machine housing 2 are arranged positively.
  • Figure 8 shows a bottom view of the grinding plate 8 and illustrates its triangular floor plan with vaulted outward Side edges 44, 45, 46.
  • FIG. 9 shows Arrangement of suction openings 47 on a common pitch circle and the support claws 48, 49, 50, 51, 52, 53 explained in FIG. 9 or the three locking hooks 24 near the grinding plate corners 54, 55, 56.
  • the arrows X-X show the section for Figure 9.
  • FIG. 9 shows the side view of the grinding plate 8 along the arrows XX according to FIG. 8.
  • the grinding plate 8 consists of a grinding plate plate 35, in particular made of rigid plastic, and of a sanding pad cushion 57, in particular made of flexible plastic.
  • the sanding plate 8 On its underside, the sanding plate 8 carries a hook and loop fastener system 57 ' to which the sanding sheets (not shown) or other tools with velor backing fit.
  • the grinding plate plate 35 On the side facing the tool holder 9, the grinding plate plate 35 carries two supporting claws 48, 49, 50, 51, 52, 53 opposite each other in mirror image in each grinding plate corner 54, 55, 56 as well as a locking hook 24 symmetrically divided by the bisector of the angle.
  • the supporting claws have one Pointed, outwardly facing, obliquely arranged support and holding surfaces 58, 59.
  • the latching hooks 24 also have counter-bevels 36, 37, which point towards the center and face toward the center of the sanding plate 8 and are used to latch the latch 23 of the control button 22 (FIG. 3) are provided.
  • the grinding plate 8 can be arbitrarily assigned to the corners of the tool holder.
  • the function of the support claws 48, 49, 50, 51, 52, 53 changes depending on whether they snap into the engagement openings 39, 40 of the tool holder 9 arranged at the rear, opposite the control button 22, and thus hold the grinding plate 8 on the tool holder 9 in a hinge-like manner or whether the support claws 48, 49, 50, 51, 52, 53 act as an elastic spacer, slide on the support bevels 62, 63, 64, 65 ( Figure 12) and hold the grinding plate 8 pre-tensioned against the tool holder 9, so to speak.
  • FIG. 10 shows the enlargement of a bellows 21 according to FIG Figures 1 and 3 with a flat, rectangular cross section, accordingly the mouth 19 according to FIG. 4.
  • FIGS. 11 and 12 show a view of the tool holder 9 from behind and from below.
  • the cams 60, 61 are visible, on which support the support claws 48, 49, 50, 51, 52, 53 and ensure a play-free, tight fastening of the grinding disc 8 to the tool holder. 9
  • the same task has bevels 62, 63, 64, 65, which are arranged on the inside on the side surfaces 66, 67 of the tool holder 9 and when mounting the grinding plate 8 sliding on the support claws 48, 49, 50, 51, 52, 53 for bracing between grinding plate 8 and tool holder 9 and thus ensure a play-free arrangement. Furthermore, the sliding guide 68 for receiving the control button 22 can be seen particularly well from below.
  • a special grinding plate 70 is shown in FIGS. 13 and 14.
  • the Special grinding plate 70 analogous to grinding plate 8 according to the figures 8, 9, in each inner contour corner 81, 82, 83 mirror each other opposing support claws 72, 73, 74, 75, 76, 77 and one through the longitudinal bisector symmetrically split snap hooks 71.
  • the support claws 72, 73, 74, 75, 76, 77 have outward-facing, beak-like oblique - arranged support and holding surfaces 48, 85.
  • the latching hook 71 has counter-bevels facing inwards, towards the center of the grinding plate 70 86, 87, for locking the latch 23 of the control button 22 (Fig. 3) are provided.
  • the grinding plate 70 can due to its asymmetrical structure only coupled in the longitudinal direction with the tool holder 9 be because only its forward extended area for grinding is provided and not, as in the embodiment 8, 9, the immediately below the tool holder 9th lying area.
  • the arrangement of the shifted forward becomes clear Velcro closure area 88.
  • the motor shaft and thus the flexible shaft 10 with the eccentric support 120 and the eccentric pin 12 rotate.
  • the one via the oscillating elements 17, 18 in the machine housing 2 at a safe distance against twisting and bending secured tool holder 9 performs an elliptical circular movement, following the eccentric pin 12.
  • Characterized in that the elliptical movement is directed forward, particularly well with the curved outer edges 44, 45, 46 of the sanding plate 8 or the sanding sheets, edges or grooves or other hard-to-reach areas on workpieces can be processed flush, close to the edges.
  • the grinding plate which can be released via the control button 22 without any auxiliary tools 8 can against other, not shown grinding plates preparatively equipped with sanding sheets of different grits or against a special grinding plate 70 according to FIGS. 13, 14 can be changed very quickly. Time consuming solving the Velcro fastener between sanding plate 8 and sanding sheet is not necessary, because the respective sanding sheet on its sanding plate can remain. So grinding work can be different Surface quality can be carried out conveniently in alternation.
  • the grinding plate 8 and / or the tool holder 9 Raised like a truncated pyramid over their base area, in particular together, form a truncated pyramid so that the outermost edges of the sanding sheet always in the user's field of vision of the orbital sander.
  • the channel outlet 25 for the removal of grinding dust or the like. asymmetrically at the rear end of the machine housing 2 arranged in a machine housing shell half 27 is, the channel outlet 25 can be manufactured with high accuracy be so that hoses or the like. For dust removal especially can be connected tightly and securely against unwanted loosening.
  • a scraper and / or instead of a sanding plate a saw can be attached to the tool holder.
  • the tool holder with the grinding plate in one lockable joint mounted on the machine housing so that the Grinding plate level or the like.
  • the orbital sander can be swiveled on angled, difficult to access workpieces is.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Handwerkzeugmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to a hand tool according to the Preamble of claim 1.

Durch die US 3 160 995 ist eine Handwerkzeugmaschine zum randnahen Schleifen von Flächen, insbesondere in Ecken bzw. entlang von Hohlkehlen, bekannt. Die Handwerkzeugmaschine hat einen Schleifteller mit dreieckiger Grundfläche. Dessen Arbeitsbewegung erfolgt um eine feststehende, zur Grundfläche normal verlaufende Achse hin- und her schwenkend. Dabei durchstößt die Achse den Schleifteller geometrisch nahe einer nach vorn weisenden Ecke. Der Winkel der Ecke im vorderen Bereich des Schleiftellers ist kleiner als 90°, damit der Schleifteller bis in äußerste, randnahe Bereiche von Ecken bzw. Hohlkehlen zum Schleifen einsetzbar ist. Bei einer weiterentwickelten, derartigen Handwerkzeugmaschine mit den Schleifteller geometrisch mittig durchstoßender Achse sind die Ränder des Schleifwerkzeugs gewölbt, wie auch bei Bügeleisen bekannt, zum kantenbündigen Schleifen an schwer zugänglichen Stellen.US 3 160 995 is a hand tool for edge-to-edge Sanding surfaces, especially in corners or along of grooves, known. The hand machine tool has one Sanding disc with a triangular base. Whose labor movement takes place around a fixed, normal to the base Swiveling axis back and forth. The pierces Geometrically axis the sanding disc close to a forward one Corner. The angle of the corner in the front of the sanding plate is smaller than 90 °, so that the sanding disc is Areas of corners or fillets near the edge for grinding can be used. In a more developed, such Hand machine tool with the grinding disc geometrically in the middle penetrating axis, the edges of the grinding tool are curved, as also known for irons, for flush-fitting Grinding in hard-to-reach places.

Der als gleichseitiges Dreieck mit gewölbten Seitenkanten ausgestaltete Grundriß des Schleiftellers hat, wie alle derartigen Dreiecke, drei Eckwinkel, jeweils kleiner als 90°.The one designed as an equilateral triangle with curved side edges Like all others, the grinding plate has a floor plan Triangles, three corner angles, each less than 90 °.

Darüber hinaus sind Handwerkzeugmaschinen mit rechteckigem Schleifteller bekannt, der mittels Exzenterantrieb eine gefesselte, kreisende Bewegung ausführt. Diese Handwerkzeugmaschinen werden als Schwingschleifer bezeichnet, obwohl ihr Werkzeug keine im eigentlichen Sinn schwingende Bewegung ausführt.In addition, hand tools are rectangular Grinding disc known, which by means of an eccentric drive, a bound, circular motion. These hand machine tools are referred to as orbital sanders, although you Tool does not actually perform a swinging movement.

Eine Weiterentwicklung der Schwingschleifer führte zum Exzenterschleifer mit ungefesselt kreisendem und rotierendem Schleifteller. Dessen Bewegung ist durch Einstellen mehrerer, unterschiedlicher Bearbeitungsstufen steuerbar.A further development of the orbital sander led to the eccentric sander with untied rotating and rotating grinding disc. Its movement is different by setting several Processing levels controllable.

Aus der US 4 782 632 ist eine Schleifmaschine mit einem über eine biegsame Welle angetriebenen, drehenden Schleifteller bekannt, der von einer schalenartigen, feststehenden Schutzhaube übergriffen wird, die sich mit ihrem schalenartigen Rand auf einem zu bearbeitenden Werkstück abstützt und die über einen Rohrstutzen und einen Schlauch mit einem Staubsauger verbunden ist, der anfallenden Schleifstaub nach außen absaugen kann.From US 4,782,632 is a grinding machine with one over a flexible shaft driven, rotating sanding pad known that of a shell-like, fixed protective hood is overlapped, which with its bowl-like edge on one supports the workpiece to be machined and that via a pipe socket and a hose is connected to a vacuum cleaner, the resulting grinding dust can be extracted to the outside.

Die bekannten Handwerkzeugmaschinen sind leistungsfähig aber verhältnismäßig aufwendig gebaut. Sie benötigen zum Werkzeugwechsel, d.h. Wechsel des Schleiftellers, ein Hilfswerkzeug. The well-known hand machine tools are powerful, however built relatively complex. You need to change tools, i.e. Changing the sanding plate, an auxiliary tool.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Handwerkzeugmaschine mit den Merkmalen des Anspruchs 1, der Schleifteller nach Anspruch 19 und der Werkzeughalter für eine solche Maschine gemäß Anspruch 22 haben demgegenüber den Vorteil einfacher Bauart, bequemen schnellen Wechsels des Werkzeugs, insbesondere des Schleifblatts gemeinsam mit dem Schleifteller, ohne Hilfswerkzeug, bzw. des einfachen Befestigens und Entriegelns beispielsweise zum Wenden und Reinigen des Schleiftellers. The hand tool according to the invention with the features of claim 1, the grinding plate according to claim 19 and the tool holder for such a machine according to claim 22, in contrast, have the advantage of simple design, convenient quick change of the tool, in particular the sanding sheet together with the grinding plate, without auxiliary tools or simple fastening and unlocking, for example for turning and cleaning the sanding plate.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Merkmalen der abhängigen Ansprüche. Further advantageous embodiments of the invention result from the features of the dependent claims.

Zeichnungdrawing

In der nachfolgenden Beschreibung ist anhand der zugehörigen Zeichnung ein Ausführungsbeispiel der Erfindung näher erläutert.The following description is based on the associated Drawing an embodiment of the invention explained in more detail.

Es zeigen Figur 1 die Seitenansicht einer erfindungsgemäßen Handwerkzeugmaschine, Figur 2 eine Draufsicht der Handwerkzeugmaschine gemäß Figur 1, Figur 3 einen vergrößerten Ausschnitt des vorderen Bereichs der Handwerkzeugmaschine gemäß Figur 1, Figur 4 eine Draufsicht des Werkzeughalters, Figur 5 und 6 Schwingelemente des Werkzeughalters gemäß Figur 4, Figur 7 eine Seitenansicht der Figur 4 insbesondere der Schwingelemente, Figur 8 eine Ansicht des Schleiftellers von unten, Figur 9 eine Seitenansicht des Schleiftellers, gemäß Figur 8, im Schnitt, Figur 10 einen mit dem Werkzeughalter zu koppelnden Faltenbalg zur Staubabsaugung, Figur 11 eine Seitenansicht des Werkzeughalters von der Seite des Faltenbalgs her, Figur 12 eine Ansicht des Werkzeughalters von unten, Figur 13 eine Draufsicht auf ein weiteres Ausführungsbeispiel eines Schleiftellers, Figur 14 die Seitenansicht des Schleiftellers gemäß Figur 13.1 shows the side view of an inventive Hand machine tool, Figure 2 is a plan view of the hand machine tool 1, 3 shows an enlarged detail the front area of the hand tool according to FIG. 1, 4 shows a plan view of the tool holder, FIGS. 5 and 6 Oscillating elements of the tool holder according to Figure 4, Figure 7 a Side view of Figure 4, in particular the vibrating elements, Figure 8 is a view of the grinding plate from below, FIG. 9 is a Side view of the grinding plate, according to Figure 8, in section, figure 10 a bellows to be coupled to the tool holder Dust extraction, Figure 11 is a side view of the tool holder from the side of the bellows, Figure 12 is a view of the Tool holder from below, Figure 13 is a plan view of another Embodiment of a grinding plate, Figure 14 the Side view of the grinding plate according to FIG. 13.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Die in Figur 1 gezeigte Elektrohandwerkzeugmaschine ist als Schwingschleifer 1 ausgestaltet, der ein Maschinengehäuse 2 besitzt, in dem ein Motor 3 angeordnet ist. Oben trägt der Schwingschleifer 1 einen Ein- und Ausschalter 4, insbesondere zur Bedienung mit dem Daumen. Im hinteren Bereich des Maschinengehäuses 2 ist ein Motor-Regelungsstellrad 5 angeordnet. Nach hinten tritt aus dem Maschinengehäuse 2 eine elektrische Anschlußleitung 6 mit einer Schutzhülse 7 aus. Vorn trägt der Schwingschleifer 1 einen Schleifteller 8 mit Klettverschluß 8' zur Aufnahme von nichtdargestellten Schleifblättern, der abnehmbar an einem Werkzeughalter 9 überrastend befestigt ist.The electrical hand machine tool shown in FIG. 1 is designed as an orbital sander 1, which has a machine housing 2 in which a motor 3 is arranged. The orbital sander 1 carries an on and off switch 4 at the top, in particular for operation with the thumb. A motor control adjusting wheel 5 is arranged in the rear area of the machine housing 2. An electrical connection line 6 with a protective sleeve 7 emerges from the rear of the machine housing 2. At the front, the orbital sander 1 carries a sanding plate 8 with a Velcro fastener 8 ' for receiving sanding sheets (not shown), which is detachably attached to a tool holder 9 in a latching manner.

Auf den Werkzeughalter 9 und damit den Schleifteller 8 werden Drehungen des Motors 3 durch eine biegsame Welle 10 übertragen, die über eine seitliche Schwingungsbegrenzung 11 im Maschinengehäuse 2 geführt ist. Die biegsame Welle 10 endet einenends in einem Exzenterträger 120, der einen Exzenterzapfen 12 trägt und der kurbelwellenartig über ein Nadellager 13 am Werkzeughalter 9 und über ein unteres Wälzlager 14 am Maschinengehäuse 2 nahe dem Werkzeughalter 9 und diesem zugewandt drehbar gelagert ist. Auf der dem Werkzeughalter 9 abgewandten Seite ist die biegsame Welle 10 über eine Steckkupplung 15 mit einer nicht näher erläuterten Motorwelle gekuppelt. Außerdem ist in der Nähe der Steckkupplung 15 die biegsame Welle 10 in einem oberen Wälzlager 16 im Maschinengehäuse 2 drehbar gelagert.Rotations of the motor 3 are transmitted to the tool holder 9 and thus to the grinding plate 8 by a flexible shaft 10, which is guided in the machine housing 2 via a lateral vibration limitation 11. The flexible shaft 10 ends at one end in an eccentric support 120 which carries an eccentric pin 12 and which is rotatably supported in a crankshaft-like manner via a needle bearing 13 on the tool holder 9 and via a lower roller bearing 14 on the machine housing 2 near the tool holder 9. On the side facing away from the tool holder 9, the flexible shaft 10 is coupled to a motor shaft (not explained in more detail) via a plug-in coupling 15. In addition, in the vicinity of the plug-in coupling 15, the flexible shaft 10 is rotatably mounted in an upper roller bearing 16 in the machine housing 2.

Der Werkzeughalter 9 ist über zwei blattfederartige Schwingelemente 17, 18 am Maschinengehäuse 2 gegen Verlieren und gegen Drehmitnahme gesichert befestigt.The tool holder 9 is secured via two leaf spring-like oscillating elements 17, 18 on the machine housing 2 against loss and against rotation.

Zwischen einer Mündung 19 zum Staubaustritt am Werkzeughalter 9 und einem Staubabtransportkanal 20 im Maschinengehäuse 2 ist als elastisches Verbindungselement ein Faltenbalg 21 angeordnet, durch den ungehindert der kreisenden Bewegung des Werkzeughalters 9 Staub abströmen kann.Between a mouth 19 for dust discharge on the tool holder 9 and a dust removal duct 20 in the machine housing 2 is as elastic connecting element a bellows 21 arranged, through the unimpeded circular movement of the tool holder 9 dust can flow out.

Im Bereich der vorderen Ecke 42 (Fig. 2) trägt der Werkzeughalter 9 eine von vorn bzw. von oben gut zugängliche Bedientaste 22, die nach hinten verschiebbar ist und einstückig mit einem Riegel 23 verbunden ist. Dieser - nachfolgend zu Figur 3 erläuterte - Riegel 23 greift in einen Rasthaken 24 des Schleiftellers 8 ein und hält dadurch den Schleifteller 8 am Werkzeughalter 9 fest.In the area of the front corner 42 (FIG. 2) , the tool holder 9 carries an operating button 22 which is easily accessible from the front or from above and which can be moved to the rear and is integrally connected to a latch 23. This - explained below with reference to Figure 3 - latch 23 engages in a locking hook 24 of the grinding plate 8 and thereby holds the grinding plate 8 on the tool holder 9.

In Figur 2 sind die zuvor beschriebenen Einzelheiten von oben deutlich erkennbar, so die Bedientaste 22, der dreieckige Werkzeughalter 9 mit Schleifteller 8, der Ein- und Ausschalter 4, die elektrische Anschlußleitung 6 und das Motor-Regelungsstellrad 5. Über die Figur 1 hinausgehend sind in Figur 2 erkennbar ein Kanalaustritt 25 sowie eine Trennfuge 26, die den Aufbau des Maschinengehäuses 2 aus zwei unsymmetrischen Halbschalen 27, 28 zeigt.In Figure 2, the details described above are from above clearly recognizable, so the control button 22, the triangular tool holder 9 with grinding plate 8, the on / off switch 4, the electrical connection line 6 and the motor control dial 5. Going beyond Figure 1 can be seen in Figure 2 a channel exit 25 and a parting line 26, the structure of the Machine housing 2 made of two asymmetrical half shells 27, 28 shows.

In Figur 3 sind die zuvor beschriebenen Einzelheiten deutlicher zu erkennen: Das Maschinengehäuse 2, der Werkzeughalter 9, der Schleifteller 8 mit den Staubabsaugöffnungen 47, die biegsame Welle 10, hinteres und vorderes Schwingelement 17, 18, - die den Werkzeughalter 9 mit dem Schleifteller 8 gegenüber dem Maschi-nengehäuse 2 elastisch festhalten -, der Faltenbalg 21, das untere Wälzlager 14 und der am Exzenterträger 120 angeordnete Exzenterzapfen 12. Über die Figuren 1 und 2 hinaus ist ein Nadellager 13 zwischen dem Werkzeughalter 9 und dem Exzenterzapfen 12 bezeichnet, sowie eine auf dem Exzenterzapfen 12 angeordnete Ausgleichsmasse 30 zum Mindern der bei der Exzenterbewegung des Werkzeughalters 9 mit Schleifteller 8 auftretenden Unwucht. The details described above can be seen more clearly in FIG. 3: the machine housing 2, the tool holder 9, the grinding plate 8 with the dust extraction openings 47 , the flexible shaft 10, the rear and front oscillating elements 17, 18, which hold the tool holder 9 with the grinding plate 8 hold elastically with respect to the machine housing 2 , the bellows 21, the lower roller bearing 14 and the eccentric pin 12 arranged on the eccentric carrier 120. In addition to FIGS. 1 and 2, a needle bearing 13 between the tool holder 9 and the eccentric pin 12 is designated, as well as one on the eccentric pin 12 arranged balancing mass 30 to reduce the imbalance occurring during the eccentric movement of the tool holder 9 with grinding plate 8.

Weiter werden die Ausgestaltung des schalenartigen Werkzeughalters 9 und der Bedientaste 22 klar:
Die Bedientaste 22 ist nach hinten verschiebbar gelagert gegen die Kraft einer Druckfeder 31. Auf der dem Schleifteller 8 zugewandten Seite trägt die Bedientaste 22 eine Ausnehmung 32, deren seitlich linke Rontur zwei Schrägflächen 33, 34 aufweist, die eine schnabelartige Spitze bilden. Dieser Spitze steht eine ähnliche Spitze eines Rasthakens 24 gegenüber, der einstückig aus einer festen Schleiftellerplatte 35 ausgeformt ist. Der Rasthaken 24 trägt zwei Gegenschrägen 36, 37. Die obere Schrägfläche 33 des Riegels 23 bzw. der Bedientaste 22 verhakt und verspannt sich, den Rasthaken 24 untergreifend, gegen die untere Gegenschräge 37 und stabilisiert so die Verriegelung des Schleiftellers 8 am Werkzeughalter 9, so daß im gespannten Zustand der Schleifteller 8 fest gegen den Werkzeughalter 9 gepreßt wird. Außerdem muß durch die Wirkung der unteren Schrägfläche 34 beim Montieren des Schleiftellers 8 am Werkzeughalter 9 die Bedientaste 22 nicht nach hinten verschoben werden, da der Rasthaken 24 am Riegel 23 aufgleitet, diesen selbsttätig zurückschiebt und überrastet. Zum Lösen des Schleiftellers 8 wird die Bedientaste 22 nach hinten verschoben, so daß sich der Riegel 23 gegenüber dem Rasthaken 24 aus der Rastposition soweit entfernt, daß deren Spitzen einander freigeben. Der Schleifteller kann nun um die hintere Kante im Bereich der Eingriffsöffnungen 39, 40 (Fig. 4) gegenüber dem Werkzeughalter 9 geschwenkt und entnommen werden, wobei ein unbeabsichtigtes Lösen des Schleiftellers 8 durch die in die Kontur der Werkzeugträgers 9 integrierte bzw. zurückgesetzte Position der Bedientaste 22 und durch deren Rückstellfeder 31 auszuschließen ist.The configuration of the shell-like tool holder 9 and the control button 22 also become clear:
The control button 22 is displaceably supported against the force of a compression spring 31. On the side facing the grinding plate 8, the control button 22 has a recess 32, the left-hand contour of which has two inclined surfaces 33, 34 which form a beak-like tip. This tip is opposite a similar tip of a latching hook 24, which is formed in one piece from a fixed sanding plate 35. The locking hook 24 carries two counter bevels 36, 37. The upper inclined surface 33 of the bolt 23 or the control button 22 hooks and braces, engaging under the locking hook 24, against the lower counter bevel 37 and thus stabilizes the locking of the grinding plate 8 on the tool holder 9, so that in the tensioned state the grinding plate 8 is pressed firmly against the tool holder 9. In addition, the operating button 22 does not have to be moved backwards by the action of the lower inclined surface 34 when mounting the grinding plate 8 on the tool holder 9, since the latching hook 24 slides on the bolt 23, automatically pushes it back and latches. To release the grinding plate 8, the control button 22 is moved rearward, so that the bolt 23 with respect to the latching hook 24 is removed from the latching position to such an extent that the tips thereof release one another. The grinding plate can now be pivoted and removed around the rear edge in the area of the engagement openings 39, 40 (FIG. 4) relative to the tool holder 9, an unintentional loosening of the grinding plate 8 by the position of the tool holder 9 integrated or reset in the contour of the tool holder Control button 22 and its return spring 31 can be excluded .

In Figur 4 ist die Draufsicht auf den Werkzeughalter 9 gezeigt mit den Schwingelementen 17, 18 und der Mündung 19 des Staubabtransportkanals 20 sowie mit zwei Eingriffsöffnungen 39, 40 zum Einrasten der Stützkrallen 48, 49, 50, 51, 52, 53, mit denen sich der Schleifteller 8 am Werkzeughalter 9 festhält. Ferner sind die Öffnung 41 zum Eingriff des Nadellagers 13 bzw. für den Exzenterzapfen 12 sowie in der vorderen Ecke 42 die Öffnung 43 zur Aufnahme der Bedientaste 22 gezeigt.In Figure 4, the top view of the tool holder 9 is shown with the vibrating elements 17, 18 and the mouth 19 of the dust removal channel 20 and with two engagement openings 39, 40 for engaging the support claws 48, 49, 50, 51, 52, 53, with which the grinding plate 8 holds on to the tool holder 9. Furthermore, the opening 41 for engaging the needle bearing 13 or for the eccentric pin 12 and in the front corner 42 the opening 43 for receiving the control button 22 are shown.

In den Figuren 5 und 6 sind als Einzelheit die Schwingelemente 17, 18 gezeigt. Daraus wird deutlich, daß das hintere Schwingelement 17 ein Paar aus je drei Einzelschwingsäulen ist und das vordere Schwingelement 18 aus vier Einzel-Schwingssäulen besteht.FIGS. 5 and 6 show the vibrating elements as a detail 17, 18 shown. It is clear from this that the rear vibrating element 17 is a pair of three individual vibrating columns and that Front vibrating element 18 consists of four individual vibrating columns.

Figur 7 verdeutlicht die Anordnung der Schwingelemente 17, 18 auf dem Werkzeughalter 9 und zeigt in der Seitenansicht der Figur 4 entlang der Schnittlinie der Pfeile Y-Y das T-Profil der Schwingelemente 17, 18, die mit ihren oberen Querblättern in entsprechende, nicht näher bezeichnete Aussparungen des Maschinengehäuses 2 formschlüssig angeordnet sind.FIG. 7 illustrates the arrangement of the oscillating elements 17, 18 on the tool holder 9 and shows in the side view of the figure 4 along the section line of the arrows Y-Y the T-profile of the Swinging elements 17, 18 with their upper cross blades in corresponding, not specified recesses of the machine housing 2 are arranged positively.

Figur 8 zeigt eine Ansicht von unten auf den Schleifteller 8 und verdeutlicht dessen dreieckigen Grundriß mit nach außen gewölbten Seitenkanten 44, 45, 46. Darüber hinaus wird deutlich, die Anordnung von Absaugöffnungen 47 auf einem gemeinsamen Teilkreis und die zu Figur 9 erklärten Stützkrallen 48, 49, 50, 51, 52, 53 bzw. der drei Rasthaken 24 nahe den Schleiftellerecken 54, 55, 56. Die Pfeile X-X zeigen den Schnittverlauf für Figur 9. Figure 8 shows a bottom view of the grinding plate 8 and illustrates its triangular floor plan with vaulted outward Side edges 44, 45, 46. In addition, it becomes clear that Arrangement of suction openings 47 on a common pitch circle and the support claws 48, 49, 50, 51, 52, 53 explained in FIG. 9 or the three locking hooks 24 near the grinding plate corners 54, 55, 56. The arrows X-X show the section for Figure 9.

Figur 9 zeigt die Seitenansicht des Schleiftellers 8 entlang der Pfeile X-X nach Figur 8. Hier wird deutlich, daß der Schleifteller 8 aus einer Schleiftellerplatte 35, insbesondere aus festem Kunststoff, und aus einem Schleiftellerkissen 57, insbesondere aus weichelastischem Kunststoff besteht. Auf seiner Unterseite trägt der Schleifteller 8 ein Klettverschlußsystem 57' mit Häkchen, zu dem nichtdargestellte Schleifblätter bzw. andere Werkzeuge mit Velourrücken passen.FIG. 9 shows the side view of the grinding plate 8 along the arrows XX according to FIG. 8. It is clear here that the grinding plate 8 consists of a grinding plate plate 35, in particular made of rigid plastic, and of a sanding pad cushion 57, in particular made of flexible plastic. On its underside, the sanding plate 8 carries a hook and loop fastener system 57 ' to which the sanding sheets (not shown) or other tools with velor backing fit.

Auf der dem Werkzeughalter 9 zugewandten Seite trägt die Schleiftellerplatte 35 in jeder Schleiftellerecke 54, 55, 56 zwei einander spiegelbildlich gegenüberliegende Stützkrallen 48, 49, 50, 51, 52, 53 sowie einen durch die Winkelhalbierende symmetrisch geteilten Rasthaken 24. Die Stützkrallen haben zu einer Spitze zulaufende, nach außen weisende schräg angeordnete Stützund Halteflächen 58, 59. Die Rasthaken 24 haben ebenfalls zu einer Spitze zulaufende, nach innen zur Mitte des Schleiftellers 8 gewandte, Gegenschrägen 36, 37, die zum Einrasten des Riegels 23 der Bedientaste 22 (Fig. 3) vorgesehen sind.On the side facing the tool holder 9, the grinding plate plate 35 carries two supporting claws 48, 49, 50, 51, 52, 53 opposite each other in mirror image in each grinding plate corner 54, 55, 56 as well as a locking hook 24 symmetrically divided by the bisector of the angle. The supporting claws have one Pointed, outwardly facing, obliquely arranged support and holding surfaces 58, 59. The latching hooks 24 also have counter-bevels 36, 37, which point towards the center and face toward the center of the sanding plate 8 and are used to latch the latch 23 of the control button 22 (FIG. 3) are provided.

Der Schleifteller 8 kann aufgrund seines vollständig symmetrischen Aufbaus mit den Schleiftellerecken 54, 55, 56 beliebig den Ecken des Werkzeughalters zugeordnet werden. Hierbei wechselt die Funktion der Stützkrallen 48, 49, 50, 51, 52, 53 je nachdem, ob diese in die hinten, gegenüber der Bedientaste 22 angeordneten Eingriffsöffnungen 39, 40 des Werkzeughalters 9 rasten und damit den Schleifteller 8 am Werkzeughalter 9 scharnierartig festhalten oder ob die Stützkrallen 48, 49, 50, 51, 52, 53 als elastische Distanzfeder wirken, an den Stützschrägen 62, 63, 64, 65 (Figur 12) aufgleiten und den Schleifteller 8 gegenüber dem Werkzeughalter 9 sozusagen vorgespannt festhalten.Due to its completely symmetrical structure with the grinding plate corners 54, 55, 56, the grinding plate 8 can be arbitrarily assigned to the corners of the tool holder. The function of the support claws 48, 49, 50, 51, 52, 53 changes depending on whether they snap into the engagement openings 39, 40 of the tool holder 9 arranged at the rear, opposite the control button 22, and thus hold the grinding plate 8 on the tool holder 9 in a hinge-like manner or whether the support claws 48, 49, 50, 51, 52, 53 act as an elastic spacer, slide on the support bevels 62, 63, 64, 65 (Figure 12) and hold the grinding plate 8 pre-tensioned against the tool holder 9, so to speak.

Die Figur 10 zeigt die Vergrößerung eines Faltenbalgs 21 gemäß den Figuren 1 und 3 mit flachem, rechteckigem Querschnitt, entsprechend der Mündung 19 gemäß Figur 4. FIG. 10 shows the enlargement of a bellows 21 according to FIG Figures 1 and 3 with a flat, rectangular cross section, accordingly the mouth 19 according to FIG. 4.

Die Figuren 11 und 12 zeigen eine Ansicht des Werkzeughalters 9 von hinten bzw. von unten. Dabei wird die gemäß der Figuren 4 bis 7 nicht sichtbare symmetrische Anordnung der Schwingelemente 17, 18 deutlich. Darüberhinaus sind die Nocken 60, 61 erkennbar, an denen sich die Stützkrallen 48, 49, 50, 51, 52, 53 abstützen und eine spielfreie, verspannte Befestigung des Schleiftellers 8 am Werkzeughalter 9 sichern.FIGS. 11 and 12 show a view of the tool holder 9 from behind and from below. The symmetrical arrangement of the oscillating elements 17, 18, which is not visible according to FIGS. 4 to 7, becomes clear. Moreover, the cams 60, 61 are visible, on which support the support claws 48, 49, 50, 51, 52, 53 and ensure a play-free, tight fastening of the grinding disc 8 to the tool holder. 9

Die gleiche Aufgabe haben Stützschrägen 62, 63, 64, 65, die innen auf den Seitenflächen 66, 67 des Werkzeughalters 9 angeordnet sind und beim Montieren des Schleiftellers 8 aufgleitend auf die Stützkrallen 48, 49, 50, 51, 52, 53 für ein Verspannen zwischen Schleifteller 8 und Werkzeughalter 9 sorgen und damit eine spielfreie Anordnung sichern. Weiter ist von unten besonders gut erkennbar die Verschiebeführung 68 zur Aufnahme der Bedientaste 22.The same task has bevels 62, 63, 64, 65, which are arranged on the inside on the side surfaces 66, 67 of the tool holder 9 and when mounting the grinding plate 8 sliding on the support claws 48, 49, 50, 51, 52, 53 for bracing between grinding plate 8 and tool holder 9 and thus ensure a play-free arrangement. Furthermore, the sliding guide 68 for receiving the control button 22 can be seen particularly well from below.

In den Figuren 13 und 14 ist ein Sonderschleifteller 70 dargestellt. Auf der dem Werkzeughalter 9 zugewandten Seite trägt der Sonderschleifteller 70, analog zu Schleifteller 8 gemäß der Figuren 8, 9, in jeder Innenkontur-Ecke 81, 82, 83 einander spiegelbildlich gegenüberliegende Stützkrallen 72, 73, 74, 75, 76, 77 sowie einen durch die längs verlaufende Winkelhalbierende symmetrisch geteilten Rasthaken 71. Die Stützkrallen 72, 73, 74, 75, 76, 77 haben nach außen weisende, schnabelähnliche schräg - angeordnete Stütz- und Halteflächen 48, 85. Der Rasthaken 71 hat nach innen, zur Mitte des Schleiftellers 70 gewandte, Gegenschrägen 86, 87, die zum Einrasten des Riegels 23 der Bedientaste 22 (Fig. 3) vorgesehen sind.A special grinding plate 70 is shown in FIGS. 13 and 14. On the side facing the tool holder 9, the Special grinding plate 70, analogous to grinding plate 8 according to the figures 8, 9, in each inner contour corner 81, 82, 83 mirror each other opposing support claws 72, 73, 74, 75, 76, 77 and one through the longitudinal bisector symmetrically split snap hooks 71. The support claws 72, 73, 74, 75, 76, 77 have outward-facing, beak-like oblique - arranged support and holding surfaces 48, 85. The latching hook 71 has counter-bevels facing inwards, towards the center of the grinding plate 70 86, 87, for locking the latch 23 of the control button 22 (Fig. 3) are provided.

Der Schleifteller 70 kann aufgrund seines unsymmetrischen Aufbaus nur in Längsrichtung mit dem Werkzeughalter 9 gekoppelt werden, weil nur sein nach vorn verlängerter Bereich zum Schleifen vorgesehen ist und nicht, wie bei dem Ausführungsbeispiel gemäß Figur 8, 9, der unmittelbar unter dem Werkzeughalter 9 liegende Bereich. Deutlich wird die Anordnung des nach vorn verlagerten Klettverschlußbereichs 88.The grinding plate 70 can due to its asymmetrical structure only coupled in the longitudinal direction with the tool holder 9 be because only its forward extended area for grinding is provided and not, as in the embodiment 8, 9, the immediately below the tool holder 9th lying area. The arrangement of the shifted forward becomes clear Velcro closure area 88.

Mit einem Schleifteller 70 gemäß Figur 13, 14 ist es möglich, in engen Zwischenräumen zu schleifen, beispielsweise Lamellen von Fensterläden, Türen oder beispielsweise eng aneinander grenzende Heizkörperrippen.With a grinding plate 70 according to FIGS. 13, 14, it is possible to to grind narrow spaces, for example slats from Shutters, doors or, for example, closely adjacent Radiator fins.

Nach Einschalten des Motors 3 über den Ein- und Ausschalter 4 dreht sich die Motorwelle und damit die flexible Welle 10 mit dem Exzenterträger 120 und dem Exzenterzapfen 12. Der über die Schwingelemente 17, 18 im Maschinengehäuse 2 in einem sicheren - Abstand gegen Verdrehen und Verbiegen gesicherte Werkzeughalter 9 führt eine elliptische Kreisbewegung aus, wobei er dem Exzenterzapfen 12 folgt. Dadurch, daß die elliptische Bewegung längs nach vorn gerichtet ist, können besonders gut mit den gewölbten Außenkanten 44, 45, 46 des Schleiftellers 8 bzw. der Schleifblätter Kanten- bzw. Hohlkehlen oder andere, schwer zugängliche Bereiche an Werkstücken bündig, kantennah bearbeitet werden.After switching on the motor 3 via the on / off switch 4, the motor shaft and thus the flexible shaft 10 with the eccentric support 120 and the eccentric pin 12 rotate. The one via the oscillating elements 17, 18 in the machine housing 2 at a safe distance against twisting and bending secured tool holder 9 performs an elliptical circular movement, following the eccentric pin 12. Characterized in that the elliptical movement is directed forward, particularly well with the curved outer edges 44, 45, 46 of the sanding plate 8 or the sanding sheets, edges or grooves or other hard-to-reach areas on workpieces can be processed flush, close to the edges.

Der ohne Hilfswerkzeug über die Bedientaste 22 lösbare Schleifteller 8 kann gegen weitere, nichtdargestellte Schleifteller vorbereitend bestückt mit Schleifblättern unterschiedlicher Körnung oder gegen einen Sonderschleifteller 70 gemäß Figur 13, 14 besonders schnell gewechselt werden. Zeitaufwendiges Lösen des Klettverschlusses zwischen Schleifteller 8 und Schleifblatt entfällt, weil das jeweilige Schleifblatt an seinem Schleifteller verbleiben kann. So können Schleifarbeiten unterschiedlicher Oberflächengüte im Wechsel bequem durchgeführt werden.The grinding plate, which can be released via the control button 22 without any auxiliary tools 8 can against other, not shown grinding plates preparatively equipped with sanding sheets of different grits or against a special grinding plate 70 according to FIGS. 13, 14 can be changed very quickly. Time consuming solving the Velcro fastener between sanding plate 8 and sanding sheet is not necessary, because the respective sanding sheet on its sanding plate can remain. So grinding work can be different Surface quality can be carried out conveniently in alternation.

Für die Übersichtlichkeit der zu bearbeitenden Flächen bzw. Kanten und die Kontrolle des Schwingschleifers 1 ist es vorteilhaft, daß sich der Schleifteller 8 und/oder der Werkzeughalter 9 pyramidenstumpfartig über deren Grundfläche erheben, insbesondere gemeinsam, bündig einen Pyramidenstumpf bilden, so daß die äußersten Kanten des Schleifblattes stets im Sichtfeld des Benutzers des Schwingschleifers liegen.For the clarity of the surfaces or edges to be processed and the control of the orbital sander 1, it is advantageous that the grinding plate 8 and / or the tool holder 9 Raised like a truncated pyramid over their base area, in particular together, form a truncated pyramid so that the outermost edges of the sanding sheet always in the user's field of vision of the orbital sander.

Dadurch, daß der Kanalaustritt 25 zum Abtransport von Schleifstaub oder dergl. asymmetrisch am hinteren Ende des Maschinengehäuses 2 in einer Maschinengehäuse-Schalenhälfte 27 angeordnet ist, kann der Kanalaustritt 25 mit hoher Genauigkeit gefertigt werden, so daß Schläuche oder dergl. zum Staubabtransport besonders dicht und sicher gegen ungewolltes Lösen anschließbar sind.Characterized in that the channel outlet 25 for the removal of grinding dust or the like. asymmetrically at the rear end of the machine housing 2 arranged in a machine housing shell half 27 is, the channel outlet 25 can be manufactured with high accuracy be so that hoses or the like. For dust removal especially can be connected tightly and securely against unwanted loosening.

Bei einem nicht dargestellten Ausführungsbeispiel der Erfindung ist an Stelle der Schleifteller 8 bzw. 70 gemäß Figur 8 bzw. 13 ein entsprechend passendes Trennblech analog zur Befestigungsart der genannten Schleifteller angeklipst. Mit diesem Schneidblech können beispielsweise Fußbodenbeläge und Tapeten bequem vom Untergrund gelöst werden.In an embodiment of the invention, not shown is in place of the grinding plates 8 and 70 according to FIGS. 8 and 13 a suitable divider similar to the type of fastening of the mentioned grinding plate clipped on. With this cutting plate For example, you can easily remove floor coverings and wallpaper from the surface be solved.

Bei einem anderen nichtdargestellten Ausführungsbeispiel der Erfindung ist anstelle eines Schleiftellers ein Schaber und/oder eine Säge an den Werkzeuqhalter ansetzbar. In another embodiment of the invention, not shown is a scraper and / or instead of a sanding plate a saw can be attached to the tool holder.

Bei einem weiteren nicht dargestellten Ausführungsbeispiel der Erfindung ist der Werkzeughalter mit dem Schleifteller in einem arretierbaren Gelenk am Maschinengehäuse gelagert, so daß die Schleiftellerebene oder dergl. zur Anpassung des Schwingschleifers an verwinkelte, schwer zugängliche Werkstücke schwenkbar ist.In a further embodiment of the Invention is the tool holder with the grinding plate in one lockable joint mounted on the machine housing so that the Grinding plate level or the like. To adapt the orbital sander can be swiveled on angled, difficult to access workpieces is.

Claims (26)

  1. Hand-held surface-processing power tool (1) which has a machine casing (2) containing a motor (3) and which, at the front, carries on a toolholder (9) a rotary, orbital or oscillatory sanding plate (8) having a triangular flatiron-like base to mount triangular flatiron-like abrasive sheets by means of a loop-and-burr fastener, characterized in that the toolholder (9) is of shell-like design with a triangular flatiron-like base or contour which substantially coincides with the base of the sanding plate (8) and is detachably supported on the sanding plate (8) by its outer edge region (69), the toolholder (9) being detachably coupled by means of an eccentric pin (12) to the motor (3), on the side remote from the sanding plate (8), and carrying a plurality of resilient oscillating elements (17, 18) there which fasten the toolholder (9) on the machine casing (2) such as to secure it against corotation and against detachment, it being possible for the sanding plate (8) to be clipped in place on the toolholder (9) and removed without an auxiliary tool, and in that the sanding plate (8) and/or the toolholder (9) rise or rises in the form of a truncated pyramid above the base and lie or lies flush to form a truncated pyramid.
  2. Hand-held power .tool according to Claim 1, characterized in that the toolholder (9) is provided with an operating button (22), during the actuation of which the locking between the sanding plate (8) and the toolholder (9) can be released without an auxiliary tool and which, when not actuated, serves as an over-latching means for securing the sanding plate (8) to the toolholder (9).
  3. Hand-held power tool according to Claim 2, characterized in that the toolholder (9), on the side (45) opposite the operating button (22), has at least one engagement opening (39, 40) in which at least one support claw (48, 49, 50, 51, 52, 53) of the sanding plate (8) engages.
  4. Hand-held power tool according to Claim 2 or 3, characterized in that the pushbutton (22) carries a bolt (23) which is arranged for resilient displacement on the toolholder (9), in particular against the action of a compression spring (31), such as to be secured against detachment, and which in its resiliently held end position secures the sanding plate (8).
  5. Hand-held power tool according to Claim 4, characterized in that the bolt (23) engages under a catch hook (24) on the sanding plate (8), preferably on the side of the latter which faces the toolholder (9).
  6. Hand-held power tool according to one of Claims 1 to 5, characterized in that, in addition to at least one catch hook (24), the sanding plate (8) carries integrally support means, in particular designed as support claws (48, 49, 50, 51, 52, 53), which are supported on the toolholder (9) and thereby secure the sanding plate (8) in position, preferably in a restraining manner.
  7. Hand-held power tool according to Claim 6, characterized in that in each case one catch hook (24) and two support claws (48, 49, 50, 51, 52, 53) are arranged at each of the corners (54, 55, 56) of the sanding plate.
  8. Hand-held power tool according to one of the preceding claims, characterized in that the toolholder (9), on the side facing the sanding plate (8), carries support means (60, 61), against which the sanding plate (8) is supported in a restraining manner free of play.
  9. Hand-held power tool according to Claim 1, characterized in that the operating button (22) is accessible from the front and/or from above and can be elastically displaced towards the rear, in that a plurality of catch means of the sanding plate (8), which are preferably designed as catch hooks (24) and support claws (48, 49, 50, 51, 52, 53), catch in catch means of the toolholder (9) which interact therewith and are preferably designed as engagement openings (39, 40), and in that the operating button (22) interacts with one of these catch means (24) of the sanding plate (8) in such a way that it locks the sanding plate (8) on the toolholder (9) in the rest position and releases the catch means (24) in the position displaced to the rear.
  10. Hand-held power tool according to Claim 1, characterized in that the sanding plate (8) is of symmetrical construction and is assigned with its corners (54, 55, 56) in any desired manner to the corners of the toolholder (9) in each case in a lockable and/or over-latching manner.
  11. Hand-held power tool according to one of the preceding claims, characterized in that at least two oscillating elements (17, 18) are arranged on the toolholder (9), one oscillating element (18) being arranged on the front corner (42) and another oscillating element (17) being arranged near that side edge (45) of the toolholder (9) which lies opposite this corner (42).
  12. Hand-held power tool according to Claim 11, characterized in that the rear oscillating element (17) is designed as a pair which consists of a plurality of individual oscillating columns, preferably of three individual oscillating columns each, and in that the front oscillating element (18) consists of a plurality of individual oscillating columns, preferably of four individual oscillating columns, the said individual oscillating columns in each case being connected to one another by top and bottom crossbars (91).
  13. Hand-held power tool according to Claim 12, characterized in that the top crossbars (91) of the oscillating elements (17, 18) are inserted into recesses (90) of the machine casing (2) in a positive-locking manner.
  14. Hand-held power tool according to one of the preceding claims, characterized in that a space is formed between the sanding plate (8) and the toolholder (9), which space, apart from the dust extraction openings (47) and a mouth (19) of a dust discharge duct (20), is substantially sealed with respect to the outside and is used for the extracted dust to pass through.
  15. Hand-held power tool according to one of the preceding claims, characterized in that an in particular rectangular mouth (19) of a dust discharge duct (20) is arranged, preferably centrally, on one outer side of the toolholder (9).
  16. Hand-held power tool according to Claim 15, characterized in that the mouth (19) is extended by an in particular rectangular bellows (21) to connect to the machine casing (2).
  17. Hand-held power tool according to one of the preceding claims, characterized in that the sanding plate (8) can be replaced on the toolholder (9) by other tools having the same fastening structure corresponding to the toolholder (9), such as a scraper, saw blade, parting blade or the like, without an auxiliary tool.
  18. Hand-held power tool according to one of the preceding claims, characterized in that the sanding plate (8) and/or the tool holder (9) rise or rises in the form of a truncated pyramid above the base and in particular lie or lies flush to form conjointly a truncated pyramid.
  19. Sanding plate for a hand-held power tool according to the preamble of Claim 1, characterized in that it has a triangular base or contour substantially coinciding with the base of a toolholder (9) and has means (23, 48, 49, 51, 52, 53) for detachably fixing and locking on the toolholder (9) without an auxiliary tool.
  20. Sanding plate according to Claim 19, characterized in that it carries means, in particular designed as support claws (48, 49, 50, 51, 52, 53), with which it can be supported on the toolholder (9) in a restraining manner.
  21. Sanding plate according to Claim 20, characterized in that it has dust extraction openings (47) arranged on a common pitch circle.
  22. Toolholder for a hand-held power tool according to Claim 1, characterized in that it is of shell-like design, has a triangular base or contour substantially coinciding with the base of the sanding plate (8), is supported on the sanding plate (8) by its edge, and has means (22, 60, 61, 62, 63, 64, 65) for detachably fastening and for locking the sanding plate (8) without an auxiliary tool.
  23. Toolholder according to Claim 22, characterized in that, in particular on the side facing the sanding plate (8), preferably near an engagement opening (39, 40), it carries supporting means, in particular bosses (60, 61) and/or supporting inclined surfaces (62, 63), against which the sanding plate (8), in particular its support claws (48, 49, 50, 51, 52, 53), is supported, preferably in a restraining manner free of play.
  24. Toolholder according to Claim 23, characterized in that it integrally carries resilient oscillating elements (17, 18) which fasten it such as to secure it against corotation and against detachment.
  25. Toolholder according to Claim 24, characterized in that at least two oscillating elements (17, 18) are arranged on the toolholder (9), one oscillating element (18) being arranged on the front corner (42) and another oscillating element (17) being arranged near that side edge (45) of the toolholder (9) which lies opposite the corner (42).
  26. Toolholder according to Claim 25, characterized in that the rear oscillating element (17) is designed as a pair which consists of a plurality of individual oscillating columns, preferably of three individual oscillating columns each, and in that the front oscillating element (18) consists of a plurality of individual oscillating columns, preferably of four individual oscillating columns, the said individual oscillating columns in each case being connected to one another by top and bottom crossbars (91).
EP95118775A 1993-02-04 1994-02-03 Handtool for machining surfaces Expired - Lifetime EP0710527B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE4303044A DE4303044A1 (en) 1993-02-04 1993-02-04 Hand tool for surface processing
DE9320393U DE9320393U1 (en) 1993-02-04 1993-02-04 Hand tool for surface processing
EP94101587A EP0610801B2 (en) 1993-02-04 1994-02-03 Handtool for machining surfaces
DE59410331T DE59410331D1 (en) 1994-02-03 1994-02-03 Hand tool for surface processing
US08/740,315 US5967886A (en) 1994-02-03 1996-10-28 Hand power tool for flat machining

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4303044A DE4303044A1 (en) 1993-02-04 1993-02-04 Hand tool for surface processing
EP94101587A EP0610801B2 (en) 1993-02-04 1994-02-03 Handtool for machining surfaces

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP94101587A Division EP0610801B2 (en) 1993-02-04 1994-02-03 Handtool for machining surfaces
EP94101587.7 Division 1994-02-03

Publications (3)

Publication Number Publication Date
EP0710527A2 EP0710527A2 (en) 1996-05-08
EP0710527A3 EP0710527A3 (en) 1996-09-04
EP0710527B1 true EP0710527B1 (en) 2003-10-22

Family

ID=6479544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118775A Expired - Lifetime EP0710527B1 (en) 1993-02-04 1994-02-03 Handtool for machining surfaces

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US (2) US5626510A (en)
EP (1) EP0710527B1 (en)
DE (1) DE59400402D1 (en)

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Also Published As

Publication number Publication date
US5709595A (en) 1998-01-20
EP0710527A3 (en) 1996-09-04
US5626510A (en) 1997-05-06
EP0710527A2 (en) 1996-05-08
DE59400402D1 (en) 1996-08-14

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