DE7201650U - Device for clamping two independent tools - Google Patents

Description

DIPL.-ING. R. SrHOMERUS DIPL.-I> · «. H. Λ

.'ί HAXNOVJ-: R THKATEnST «. 2. η, 1, Β ^

Betr.s Sch 32k / A / g - Applicant: Mr. Alfred Schliefke

3 Hannover-Badenetedt Soltekamp 66b

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"Device ztua clamping of two independent tools "

In order to produce a threaded hole for receiving a screw «* with a flat head or a screw with a cylindrical head, several successive work processes are necessary. First of all the boiling took place made and then chamfered the upper end of the hole with a countersink so that a screw with a Flat head can be retracted and the head does not protrude above the surface. Should a screw with a cylindrical head are retracted, a pre-cutter can be used after the drilling work has been completed End of the bore widened like a step. For L ^ roll guide Of these operations, it was previously necessary to replace the drilling tool after the drilling process and replace it with one To replace countersink or milling cutter. The time required to change the tools sram is related to the total time span for the

full workflow very high. This ratio is particularly unfavorable for short bores. With a very With a large number of bores, the time required to change the tools is hardly acceptable. To avoid this A combination tool consisting of a drill and a countersink has already been developed can consist of a single piece. Small diameter drills in particular break very often, in particular when drilling by hand. The remaining milling cutter or countersink can then also no longer be used. The usage such tools can therefore become very uneconomical. For this reason, attempts have already been made to drill and to releasably connect countersink with the help of a grub screw. However, grub screws cannot grip Transferring forces, so that such a tool is only suitable for low torques.

The object of the innovation is therefore to create a combination tool that does not have the disadvantages mentioned above cling to. The solution according to the innovation is characterized in that the ring nut of the drill chuck, ie the clamping tool for a drill is provided with a conical extension in the axial direction, the end of which has a multi-cornered Has approach for the secure attachment of the additional tool.

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To secure the additional tool on its seat, according to a further feature according to the innovation, the approach have a spring-loaded ball on one or more side surfaces for plaguing the additional tool.

The polygonal attachment to the ring nut of the drill chuck creates a non-rotatable seat suitable for absorbing high torques for an additional tool, e.g. a Countersink or a milling cutter. The drill chuck can also be used at any time without the additional chuck, if necessary * the additional tool can be attached at any time without having to loosen the drill. The approach can be any Have a number of corners, but a four- or hexagonal design appears most appropriate. The spring-loaded Ball for clamping the additional tool provides a sufficiently tight fit to prevent the additional tool from falling C to prevent during drilling. The drill can ever

be pushed more or less deeply into the chuck as required to immediately achieve the desired depth of a hole without to get additional measuring work, which is very important when pulling in wood screws.

In the drawing, an embodiment according to the innovation is shown and explained schematically.

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The jig consists of a commercially available clamping element 1, the lower end of which has a thread 2 and is divided by several slots 3 ^into at least four resilient tongues, which can be pressed against each other by an annular nut 4 in the usual way to clamp the drill 5. The ring nut 4 has a conical taper 4a and at its lower end a square Π extension 4b for receiving an additional tool, shown in the figure

Beiqaiel of a countersink 6 on. In one or more side surfaces of the projection 4b are spring-loaded balls 7 for Clamping the countersink 6 let in on the shoulder 4b.

To use the tool according to the innovation, the drill 5 is first pushed into the clamping element 1 and firmly clamped by tightening the ring nut 4. The additional tool 6 can then be moved via the drill 5 ^ v grazes and can be printed on approach 4b. Likewise is

however, it is also possible to attach the countersink 6 first, e.g. to machine a hole, and if necessary, after loosening the ring nut 4, a drill 5 to plug in and tighten.

- Protection claims - 5 -

Claims (2)

> 'I I 1 I I) I ι ι I I · t »It ill I · I I I I i · 1 · I I · I I t I · * I ·« I I · III · «I *» PROTECTION CLAIMS 1. Device for clamping two independent tools, in particular a drill and a T) nee countersink, characterized in that the ring nut (U) of the drill chuck is provided with a conical extension (Ua), the end of which faces the drill tip has a polygonal projection (Ub) for the non-rotatable attachment of the additional tool (6). 2. Device according to claim 1, characterized in that that the approach (Ub) has a spring-loaded ball (7) for plaguing the additional tool (6) on one or more side surfaces.