DE1652504B

DE1652504B - Device for adjusting the axial play of the tool spindle of a hammer drill

Info

Publication number: DE1652504B
Authority: DE
Inventors: Auf Nichtnennung Antrag
Original assignee: Mafell Maschinenfabrik Rudolf Mey Kg, 7239 Aistaig

Description

Fig. 1 zeigt ein derartiges Elektrowerkzeug, teilweise in Seitenansicht, teilweise im Schnitt gezeichnet, Fig. 1 shows such a power tool, partially in side view, partly drawn in section,

F i g. 2 stellt einen Querschnitt nach der Linie A-B der F i g. 1 dar.F i g. Figure 2 shows a cross-section along the line AB of Figure 2. 1 represents.

In dem, in der Regel aus zwei Schalen 1, 2 bestehenden Gehäuse ist der Elektromotor mit seiner das Zahnritzel 3 unmittelbar oder mittelbar tragenden Welle 4 gelagert, in dem Gehäuse ist weiter die Werkzeugspindel 5 gelagert, deren Zahnrad 6 mit dem Zahnritzel 3 in Eingriff steht. Auf die besondere, bei einem Kunststoffgehäuse in Betracht kommende Lagerhülse 7 für die Werkzeugspindel kommt es hier nicht an.In which, as a rule, consists of two shells 1, 2 The housing is the electric motor with its directly or indirectly supporting the pinion 3 Shaft 4 mounted, the tool spindle 5 is also mounted in the housing, its gear 6 with the pinion 3 is in engagement. On the special one that comes into consideration with a plastic housing Bearing sleeve 7 for the tool spindle does not matter here.

Die Schlag- oder Axialbewegung der Werkzeugspindel 5 wird in bekannter Weise durch zsvei zusammenarbeitende Scheiben erreicht. Auf die Spindel 5 ist eine in Drehrichtung durch einen Flrohkant mitgenommene Schlagscheibe 8 aufgeschoben. Die Scheibe 8 wird mit Hilfe einer sich am Lagerinnenring abstützenden Druckschraubenfeder 9 gegen einen Bund der Spindel 5 gedruckt, wodurch die Spindel bis zu der durch die Nabe des Zahnrads 6 vorgegebenen Anlage nach vom geschoben wird. Die Schlagscheibe 8 arbeitet mit der weiteren, im Spindellagerhals befestigten Scheibe 10 in bekannter Weise zusammen.The impact or axial movement of the tool spindle 5 is in a known manner by zsvei cooperating Slices reached. On the spindle 5 one is entrained in the direction of rotation by a flat edge Impact disk 8 pushed on. The disc 8 is attached to the bearing inner ring with the help of a supporting compression coil spring 9 pressed against a collar of the spindle 5, whereby the The spindle is pushed forward up to the system specified by the hub of the gear 6. the Impact disk 8 works with the further disk 10 fastened in the spindle bearing neck in a known manner together.

Das den Axialdruck der Spindel 5 aufnehmende Drucklager 11 steht in Berührung mit der dem inneren Ende der Spindel 5 zugeordneten, oben in der Einleitung erwähnten Buckelscheibe 12. Diese Scheibe 12 besitzt in ihrer Mitte eine Erhebung oder einen Buckel 12', der in axialer Übereinstimmung mit der Achse der Spindel 5 liegt. Diese Buckelscheibe macht r'^;c axialen Verschiebungen der Spindel 5 mit.The thrust bearing 11, which absorbs the axial pressure of the spindle 5, is in contact with the hump disk 12 associated with the inner end of the spindle 5 and mentioned above in the introduction the axis of the spindle 5 lies. This hump disk makes r '^; c axial displacements of the spindle 5 with.

Die mit der Buckelscheibe zusammenarbeitende Verstellvorrichtung besteht im gezeichneten Beispiel aus einer Scheibe 13, die um einen exzentrisch zur Spindel 5 gelegenen Zapfen 14 drehbar ist und die im gezeichneten Beispiel ein Loch 15 besitzt. Dieses Loch 15 liegt in der in Fig. 1 dargestellten Schlagbohrlage genau über dem Buckel 12', so daß dieser Buckel bei der Axialbewegung der Spindel in das Loch eintreten kann.The adjusting device that works together with the hump disk is in the example shown from a disc 13 which is rotatable about a pin 14 eccentrically to the spindle 5 and which is in the Example drawn has a hole 15. This hole 15 lies in the hammer drill position shown in FIG. 1 exactly above the hump 12 ', so that this hump during the axial movement of the spindle into the Hole can enter.

Im gezeichneten Beispiel besitzt die Verstellscheibe einen winklig aufgebogenen Rand 13', der im gezeichneten Beispiel als Handhabe zum VerstellenIn the example shown, the adjusting disc has an angled edge 13 ', which in the shown Example as a handle for adjustment

ίο oder Verdrehen der Scheibe 13 dient. Aus F i g. 2 ist ersichtlich, daß das Gesamtgehäuse 1, 2 mit einer seitlichen Öffnung 16 versehen ist, welche durch die abgewinkelte Handhabe 13' im wesentlichen verschlossen ist. Aus Fig. 2 ist weiter zu entnehmen, daß die Handhabe 13' stumpfwinklig gestaltet ist. In jeder der in Betracht kommenden Lagen liegt nur eine Hälfte der Handhabe 1.'- vorne in der Gehäuseöffnung 16.ίο or turning the disc 13 is used. From Fig. 2 is it can be seen that the overall housing 1, 2 is provided with a side opening 16 which passes through the angled handle 13 'is essentially closed. From Fig. 2 it can also be seen that that the handle 13 'is designed at an obtuse angle. In each of the positions in question there is only one half of the handle 1 .'- at the front in the housing opening 16.

Soll die Schlagbohrmaschine auf reines Drehbohrcn umeestellt werden, so hat der Benutzer nur nötig, mit dem Finger in der in F i g. 2 durch einen Pfeil anceuebenen Richtung auf die vorne liegende Hälfte der Handhabe 13' zu drücken, was eine Schwenkung der Scheibe 13 um den Bolzen 14 zur Folge hat. Das Loch 15 wandert dann mit der Scheibe 13 zur Seite bzw. in Fi «. 2 nach oben, so daß der Buckel 12' unten an der vollen Scheibe 13 zur Anlage kommt. Die Abmessungen können so gewählt sein, daß sich die Werkzeugspindel 5 in axialer Richtung nicht mehrIf the hammer drill is to be set to pure rotary drilling, the user only needs to with your finger in the position shown in FIG. 2 with an arrow Direction to press the front half of the handle 13 ', causing a pivoting of the Washer 13 around the bolt 14 results. The hole 15 then migrates to the side with the disk 13 or in Fi «. 2 upwards, so that the hump 12 'is below comes to rest on the full disk 13. The dimensions can be chosen so that the Tool spindle 5 no longer in the axial direction

oder nur" wenig bewegen kann. Mit der Spindel 5 kann dann schlaglos gebohrt werden. Die Gehäuseöffnung 16 ist dann durch die in Fig. 2 obenliegende HälfteI3' der Handhabe abgedeckt. Durch einfache Rückschwenkung der Verstellscheioe 1: ist die Ma-or only "can move a little. The spindle 5 can then be used to drill without impact. The housing opening 16 is then covered by the overhead half 13 'of the handle in FIG. By simple Pivoting back the adjustment slide 1: is the ma-

schine wieder auf das Schlagbohren eingestellt.machine set to hammer drilling again.

Falls erwünscht, kann das Verstellglied 13, 13' in irgendeiner geeigneten Weise festgestellt werden. Ein solches, beispielsweise natürlich bewegliches Verstellglied ist in F i g. 2 durch den Ansatz 17 angegeben.If desired, the adjusting member 13, 13 'can be locked in any suitable manner. A such, for example naturally movable adjusting member is shown in FIG. 2 indicated by approach 17.

Hierzu J Blatt ZeichnungenFor this purpose J sheet drawings

Claims

is rich. The latter, however, is a prerequisite for a patent claim: uniform axial pressing, it is also important that the adjusting ring is attached to the outside of the spindle.

1. Device for adjusting the axial play is and therefore a well-functioning Verles the tool spindle requires an electrically driven 5 anti-rotation device, which is also relatively expensive benen impact drill with an adjustable is.

member, which one or more recesses. In other devices of a similar type, the

has who or which one or more to switch from drilling to hammer drilling with the help reached the end facing away from the tool of the camshafts, which of course still Tool spindle supported or supported io entails significantly higher production costs. Switching element (s) is or are assigned because the object of the present invention is now characterized in that the adjustment therein, a device of the gate member mentioned above (13) to create a recess or a hole device, which allows the adjustment of the axial

(15) having disc, which is around a game or the switch from pure rotary drilling eccentric but parallel to the tool spindle for impact drilling with particularly little effort lay pin (14) is rotatable, and that allows. Nevertheless, this device is intended to be a self-switching element (J2) completely functional and easy thanks to one of the deepening understandable fit, can be assembled and repaired with the spindle in the axial direction.

slidable, in particular at the inner end. To achieve this object, a device

centrally arranged elevation (hump 12 ') proposed 20 of the type mentioned, which according to the invention

forms is. is characterized in that the adjustment

2. Apparatus according to claim 1, characterized in that it comprises a recess or a hole which is marked that the component (13) has a sending disk. the one eccentric Handle (13 ') has a housing opening but parallel to the tool locker! located cones

(16) and this is essentially rotatable, and that the switching element is through one of the closes. Well adapted, with the spindle in the axial

3. Apparatus according to claim 1 or 2, there- fore displaceable direction, in particular on the inside thereof characterized in that the handle (13 ') formed rem end centrally arranged elevation and the disk of the adjusting member (13) is einük-. By simply swiveling the Verstellgliekig and the handgrilf \ on d ": r disk wink- 30 des can set the recess in front of the elevation lig is bent. or rotated out of their area. Tm he

4. The device according to one or more of the more severe cases, the elevation in the depression can be vorhergchcnden Claims, characterized by the fact that the spindle stroke and thus the fact that the handle (13 ') is inherently angled. Impact drilling becomes possible while in the second in particular is obtuse angled. 35 If the elevation is affected by its axial displacement

5. Device according to one or more of the hindrances and therefore the spindle, apart from preceding claims with one of the axially low tolerances of the system, axially non-shift pressure female bearing is at the inner end of the bar.

Wcrkzcugspindcl, characterized in that the adjusting member preferably has a hand

the switching element (12) at the inner end of the pressure 4 ° handle, which faces a housing opening and lagcrs (11) is arranged. this closes essentially. Since he is outward

does not survive, there is practically no risk of inadvertent switching of the device. Another feature of the invention is thereby

45 marked that the handle and the disc

of the adjusting member are made in one piece and the handle is bent at an angle from the disc. This does not mean, of course, that the hand-The invention relates to the device handle is made by turning, rather this part can also be cast or injected to adjust the axial play of the tool spin 5 °. The del an electrically driven Schlagbolirma- handle is in a development of the invention in itself ichinc with an adjusting member which is one or angular, in particular obtuse-angled. The attachment has its recess (cn), one or more of which is made in such a way that one of the two or more on the angled leg facing away from the tool always protrudes more into the interior of the housing than the end of the tool spindle supported or other, so that from the outside easily recognizable -supported switching element (s) is or are assigned. is soft of the two flanks to switch each

In a known device of this type because it has to be pressed, that with the adjustment tfas adjusting member has an annular shape. On its member cooperating switching member, which is in front of the inner circumference it is designed with several recesses, preferably as a hump disk, is at fcen, which each work together with a ball. ⁶ ° of a drilling machine with a, the axial pressure exerts> he production of this Stcllringes is relatively expensive, since taking bearings at the inner end of the tool-4ie indentations in their size and arrangement spindle preferably on the inside facing

Cnau must be coordinated. Arranged in the end of the thrust bearing,
In particular, a very precise distribution is required. The drawing shows an exemplary embodiment of the

• m inner circumference of the ring as well as a very ⁶ S subject matter of the invention on the basis of an electric motor

{Correct depth of the recesses, otherwise driven hammer drill shown whereein evenly strong contact of the balls on the in a known manner the tool spindle of the itogformigen pressure member of the tool spindle to he motor shaft is driven from stepped down,