EP1369207B1 - Electric hand tool with mode selection switch - Google Patents

Description

The invention refers to an electric hand tool according to the preamble of claim 1. Such an electric hand tool is known from EP-A-0 775 555 known.

After DE10031050 For combi hammering, some or all of the modes: «rotary drilling», «hammer drilling», «chiseling», «chisel positioning» are selected by means of a manually rotatable mode selector switch and the gearbox or impact mechanism assembly is combined in a mechanically combined manner. The combination of several clutches takes place via a switching plate in the lubricated interior of the gear and impact mechanism assembly.

After DE4000822 is a drehversetzbarer mode selector switch with an eccentric pin lubricant seal between a grease filled gear assembly and the dry exterior arranged. All switching functions are carried out inside the gearbox and percussion unit.

After DE19937767 Some operating modes are associated with additional electrical and mechanical special functions, which engages in the motor switch via a, arranged between the gear assembly and the outer housing and displaceable by the mode selector switch with an eccentric, and with an end-side magnet via a Hall sensor, the control electronics of the drive motor in the lubricant Motor housing influenced, which locks the engine switch and increases the engine speed when "chiselling". There is only one lubricated gear and percussion unit available.

The object is the realization of a mode selector switch with further special functions for a combined electric hand tool machine with several switchable clutches in at least two differently lubricated, lubricant-tight assemblies.

The object is essentially achieved by the features of claim 1. Advantageous developments emerge from the subclaims.

Essentially, a combined electric hand tool has a preferably drehversetzbaren mode selector with further, arranged via a between a module with a clutch and an outer housing and displaceable by the mode selector shift linkage, switchable special functions, in at least two lubricated, separated lubricant-tight assemblies each have at least one switchable clutch available is, which is displaceable over an outwardly extending, lubricant-mounted actuating means, and that both actuating means are displaceable by the shift linkage.

By at least two from a lubricated assembly to outside extending, lubricant-tight mounted actuating means which are both displaceable by the mode selector or shift linkage, in different, eg. Lubricated with oil and grease, assemblies arranged clutches of the arranged in the unlubricated space Shift linkage for special functions combined switchable.

Advantageously, the actuating means is designed as a rotationally displaceable in a module housing, lubricant-mounted rotary actuating means which, for example, with O-rings is technologically easy sealable.

Advantageously, the rotary actuating means has an eccentrically arranged eccentric pin, which engages in a, further advantageously elongated, opening of the shift linkage feasible, whereby a movement of the shift linkage is transformed into a rotation of the rotary actuating means.

Advantageously, a first lubricant-tight assembly is formed as a grease-lubricated gear assembly and a second lubricant-tight assembly as oil-lubricated percussion unit, whereby an optimal wear protection is achieved.

Advantageously, a motor switch can be mechanically locked and / or electronically adjusted via the special functions via the shift linkage, the engine speed can be changed, whereby the utility of the combined electric hand tool is increased.

Fig. 1

als kombinierte Elektrohandwerkzeugmaschine

Fig. 2

als Modiwahlschalter mit Sonderfunktionen

The invention will be explained in more detail with respect to an advantageous embodiment with:

Fig. 1

as combined electric hand tool machine

Fig. 2

as a mode selector switch with special functions

To Fig. 1 respectively. Fig. 2 has a combined only partially shown, at least partially rotating and / or beating electric hand tool a drehversetzbaren mode selector 1. With the mode selector switch 1, a shift linkage 5 arranged between a lubricated assembly 2a with a shift clutch 3a and an outer housing 4 can be displaced. In each of the two separate lubricant-tight assemblies 2a, 2b in the form of a grease-lubricated gear assembly and an oil-lubricated striking mechanism is a switchable clutch 3a, 3b present, which in each case via an outside of a housing housing 7 extending, with O-rings 12a, 12b lubricant-mounted actuating means 6a, 6b in the module housing 7 are drehversetzbar. The actuating means 6a, 6b are formed with eccentrically arranged eccentric pins 8a, 8b, which engage in an opening of the shift linkage 5 executable, as well as with engaging in the clutches 3a, 3b control projections 13a, 13b. About the special functions of the mode selector 1 is mediated via the shift linkage 5 and a locking lever 15 mechanically locked in the on state lockable and electronically via a non-contact, designed in the form of a magnetic rocker 16 controlled Hall switch, sensor switch 10 and an engine electronics 11 the Engine speed changeable.

Claims (5)

1. Combined electric tool with a mode selection switch (1) with further, special functions that can be actuated by means of a linkage (5), which can be shifted by means of a mode selection switch (1), disposed between a subassembly (2a) with a shifting coupling (3a) and an outer housing (4), characterized in that there is at least one actuatable shifting coupling (3a, 3b) in at least two separate lubricated lubricant-tight subassemblies (2a, 2b), it being possible to displace the shifting coupling through actuation means (6a, 6b) that extend outwards and that are supported in a way that is lubricant-tight, and in that both actuation means (6a, 6b) can be displaced by the shifting linkage (5).
2. Electric tool in accordance with claim 1, characterized in that the actuation means (6a, 6b) is formed as rotating, actuating means supported, in a subassembly housing, such that they can be rotated and such that they are lubricant-tight.
3. Electric tool in accordance with claim 2, characterized in that the rotary, actuating means have an eccentrically arranged pin (8a, 8b) that can be moved such that it engages in an, optionally oblong, opening in the shifting linkage (5).
4. Electric tool in accordance with one of claims 1 to 3, characterized in that a first lubricant-tight subassembly (2a) is developed as a grease-lubricated gearing subassembly and a second lubricant-tight subassembly (2b) is developed as an oil-lubricated impacting subassembly.
5. Electric tool in accordance with one of the above claims, characterised in that, by means of a special feature of the mode selection switch (1), a motor switch (9) can be arrested and/or the motor speed can be varied by means of a sensor switch (10) and motor electronics (11).

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