DE2251114A1 - PARTIAL DEVICE - Google Patents

Description

Part! Device.

The invention relates to a part device with a coupling between the fixed part head housing and the for indexing the workpiece rotatable workpiece carrier to prevent rotation of the indexed workpiece carrier when machining the workpiece.

In the previously common sub-devices of this type, the axially movable coupling part is often displaceable on a Shaft arranged and secured on this against rotation by a keyway connection. With other sub-devices

309819/0234

22511H

Andrejewski, Honke & Gesthuysen, patent attorneys, 4300 Essen, Theaterplatz

the fixed coupling part is firmly connected to the device housing and the axially movable coupling part with the workpiece carrier, so that this workpiece carrier must be raised so far with each switching operation that that on him The attached coupling part disengages from the coupling part attached to the device housing. With the former As a result, couplings have to be manufactured with very precisely machined spline shafts, while in the latter ! If the workpiece carrier with the possibly very heavy workpiece sitting on it is raised for indexing must become what force is required for. Apart from that, the whole system is quite complicated and very easy to manufacture laborious.

The invention has therefore set itself the task of providing a partial device of the type mentioned at the beginning in such a way that that the workpiece carrier does not need to be lifted for indexing and that the coupling is simple and yet play-free can be produced.

A partial device according to the invention is identified in essentially in that the axially movable coupling part is attached to a metal membrane which is fixed in a rotationally fixed manner in the device housing is attached and the membrane in the housing can be acted upon from the outside with a working medium, in particular air Chamber closes, while the other, only rotatable coupling part on the underside of the workpiece carrier is attached.

309819/0234

Andrejewski, Honke & Gesthuysen, patent attorneys, 4300 Essen, Theaterplatz

The axially movable coupling part can be used as a crown gear and the merely rotatable coupling part as a counter gear be trained. Both coupling parts can also form a cone coupling.

A more detailed explanation of the invention emerges from the following description of two preferred exemplary embodiments with reference to the accompanying drawings; show it:

Figure 1 is a plan view of a first embodiment in partial section;

FIG. 2 shows an axial section through the first exemplary embodiment with locked workpiece carrier j

FIG. 3 shows an axial section through the first exemplary embodiment with the workpiece carrier disengaged;

Figure 4 is a perspective view of the used Metal membrane with the crown gear attached to it;

Figure 5 is a plan view of a second embodiment in partial section;

FIG. 6 shows an axial section through the second exemplary embodiment with the workpiece carrier coupled; and

FIG. 7 shows the same axial section as FIG. 6, but with disengaged workpiece carrier.

19/023 A

Andrejewski, Honke & Gesthuysen, patent attorneys, 4300 Essen, Theaterplatz 3

In the first embodiment of the invention shown in Figures 1 to 4, a central shaft 2 is attached to the underside of a workpiece carrier 1, which in turn is stored in a device housing 4. The lower end of this shaft 2 carries a gearwheel 5 * which with a Drive gear meshes through which the shaft and thus the Workpiece carrier 1 can be rotated. In the device housing 4 an annular metal membrane 6 is attached with its outer edge, which is corrugated concentrically. These Metal membrane 6 has a central circular opening <7 * with which they are close to a bearing j5 for the shaft 2 of the Workpiece carrier 1 is applied. At the top of this metal membrane 6 is a crown gear 8 with upwardly facing teeth 10 and one with the inner opening 7 of the metal membrane matching inner opening 9 attached. The shaft 2 with the workpiece carrier 1 attached to its upper end is then inserted into the storage 3 so that they are concentric with the central opening 9 of the crown gear 8 is located. Between this storage and the crown gear 8 is a pack in In the form of an O-ring 11, an airtight chamber 12 is created below the metal membrane 6. In the device housing 4 is an opening at the bottom of this chamber 12 air line 13 is formed through which air or Another working medium can be pressed into the chamber 12, whereby the metal membrane 6 and with it the crown gear 8 is pushed up. On the underside of the workpiece carrier 1 opposite this crown gear 8 is a counter gear 14 attached centrally. By lifting the crown gear when the chamber 12 is acted upon, the two gears engage and 14 into one another, so that the workpiece carrier 1 is fixed in its position switched on by the shaft 2 with the gearwheel 5.

0 9 8 19/0234

Andrejewski, Honke & Gesthuysen, patent attorneys, 4300 Essen, Theaterplatz 3

Above the metal membrane 6 is between the workpiece carrier 1 and the device housing 4, a chamber 16 is formed which has an opening 15. If through this opening 15 in the chamber 16 air is pressed in, the metal membrane 6 is pressed down, so that the crown gear attached to it 8 also moves downwards and is pushed out of engagement with the counter gear 14 on the underside of the workpiece carrier 1 will. As a result, the shaft 2 with the workpiece carrier 1 can be rotated again, i.e. indexed.

So if in this embodiment of the invention the Workpiece carrier 1 is to be indexed further by a certain angle, air is introduced into chamber 16 through opening 15 or another suitable working medium is blown in. As a result, the metal membrane 6 with the crown gear 8 is down pressed and releases the counter gear 14 and thus the workpiece carrier 1. The workpiece carrier 1 can then on the Shaft 2 seated gear 5 or can be switched by hand to the desired angle. Then a not shown Valve switched in such a way that via the opening 13 into the Chamber 12 air is blown. As a result, the metal membrane 6 with the crown gear 8 is pushed up again and engages into the counter gear 14 on the underside of the workpiece carrier a. Here, the metal diaphragm 6 can move vertically by a limited amount. Since the metal diaphragm 6, however, with her The outer edge is fixed in the fixed device housing 4, it withstands any torsional force which is tangential to it acts, and the workpiece carrier 1, which, as mentioned, via the counter gear 14 in frictional connection with the crown gear 8 is in the middle of the metal membrane 6,

309819/0234

Andrejewslci, Honke & Gesthuysen, patent attorneys, 4300 Essen, Theaterplafrs 3

is held immovably, even if a tangential force acts on the inner edge of the metal membrane 6. The at the Machining a workpiece on the workpiece carrier 1 acting torsional force is therefore reliable and accurate the ffletallmembran 6 caught, so that for the dividing process respectively the indexing of the workpiece carrier and the workpiece attached to it by a certain angle results in high accuracy with extreme simplicity and operational reliability of the device.

The basic parts of the second exemplary embodiment of the invention shown in FIGS. 5 to 7 are designed in the same way as the first exemplary embodiment, but here a cone coupling is provided instead of the gear wheel coupling. This cone coupling consists of a movable inner cone 8 'attached to the top of the inner edge of the metal diaphragm 6 and a mating cone 14 ¹ on the underside of the workpiece carrier 1. When in this embodiment the chamber 12 below the metal diaphragm 6 by air or another working medium via the line I ^ is acted upon, the metal membrane 6 is pressed with its coupling part, ie the inner cone 8 'upwards, so that this, as Figure 6 shows, is pressed onto the counter cone 14' on the underside of the workpiece carrier 1, creating a positive connection between both is produced. By applying air or another working medium to the upper chamber 16, the metal diaphragm 6 with its coupling part, ie the inner cone 8 ', is pressed down again and thus the force-fit connection between the two coupling parts is released, so that the workpiece carrier 1

309819/0234

Andrejewski, Honke & Gesthuysen, patent attorneys, 4300 Essen, Theaterplatz 3

can be rotated again, can * ZiAm loosening of the clutch are also, as can be clearly seen in Figures β and 7
is provided, compression springs If.

In this exemplary embodiment, too, during processing torsional forces occurring on a workpiece the .metal membrane captured. Compared to the first-described exemplary embodiment, the second exemplary embodiment is distinguished due to a simpler construction and significantly more finely graduated switching movement.

9 811/0734

Claims (3)

Andrejewski, Honke & Gesthuysen, patent attorneys, 4300 Essen, Theaterplatz 3 patent claims 1.J Tei! Device with a coupling between the fixed part head housing and the workpiece carrier which can be rotated to advance the workpiece to prevent the workpiece carrier from rotating when the workpiece is being processed, characterized in that the axially movable coupling part (8 or 8 ¹ ) is connected to a metal membrane (6) fixed in a rotationally fixed manner in the device housing (4) and the membrane in the housing closes a chamber (12) that can be acted upon from the outside by a working medium, in particular air, while the other, merely rotatable coupling part (14 or 14 ') ) is attached to the underside of the workpiece carrier (1). 2. Part device according to claim 1, characterized in that that the axially movable coupling part as a crown gear (8) and the merely rotatable coupling part as a counter gear is trained. 3. Tel! Device according to claim 1, characterized in that the two coupling parts (8 ¹ , 14 ') form a cone coupling. Patent attorney. 309819/0? 3 U Blank page