DE7402015U - Device for determining the drilling depth in blind holes - Google Patents

Description

Dipl.-In _x . Dr.-Ing. HEINZ NlflK ^ M.!. * '")' PATENT Attorney 48 BIELEFELD / WESTF. Datmoldar StraBe 26 -Il / üie- Peul Lober i., 49 Herford, ArndtetraBe 2 Device for determining the drilling depth in blind holes

The subject of the innovation relates to a device for determining the drilling depth in blind holes using metal, stone or wood drills.

Ea aind devices that allow the determination of the drilling depth
serve for blind bores, as generally belonging to the prior art. The task of all devices is to ensure that the blind holes are made to measure. The devices as such are admittedly in two parts
formed, with its part in the banking rights or
horizontal movable spindle, and the other part
is arranged directly on the stand of the drill.

Obs part connected to the movable drilling spindle finds its stop on the part, which is mounted on the stand of the drill. As a result the drilling feed is limited when both parts hit the stop and the dimensional accuracy of the drilling! · » fe is therefore given. So that different blind bores can be created, de β is with the Drill bit connected part adjustable on the spindle arranged and in most FMllsn with an indicator scale coupled, which shows the respective depth »ms8 for the hole«.

The disadvantage of the known devices is that they are only used in column drilling machines lesser ,. It is not used with hand drills because these hand drills have Machine is moved in its Geeemtheit and a dormant one Stand not available iet. But especially with hand drills lBt eins Determination of the drilling depth for blind holes wUnechsnsuert, since the same mainly in private Use circles. It has often happened here that when drilling blind holes in walls the pipes for water running in these screens or electricity will be damaged, which has unpleasant consequences

brings with it. In order to avoid this now, one has switched to the required drilling depth to mark the biker. This marking is successful: with Help a BS circle * dB piece, felt pen or the like .. In

But practice has shown that such

Markings do not guarantee exact dimensional accuracy with regard to the depth of the bore. Another type of marking for the depth 18Bt can be achieved by means of a solid rubber ring, the inner diameter of this ring dsm outer diameter must correspond to BBCrr of the drill. This but not always the fur. On the other hand, it is shifting , 9 such ring to be relatively easy on the drill and Seat must be in order to ensure dimensional accuracy dT borehole depth, are continuously monitored.

Since the markings for determining the borehole depth, as shown, are cumbersome and, moreover, inadequate, they are dispensed with in most cases. As a result, inaccurate drill bits then appear. With thin partitioning cabinet furniture iaselbe Bey animal creation of a blind hole is' often entirely durchbahrt because the feeling for the required drilling depth of the hand drill hantinabendan person is generally lacking.

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Knowing the need to determine the drilling depth bBi hand drills, the inventor has dia The task is to provide a device for determining the depth in the manufacture of blind bores by means of To disclose hand drills, wherein the device meets all the requirements that are placed on a such are provided.

The task set is solved by the innovation a clamping sleeve, which beateht from a slotted socket with a stop collar arranged on one side, wherein this socket running from the collar to the other end has a slightly conically increasing diameter and that a separate clamping ring with a jacket-side knurling is arranged on the socket, the socket on the shell side means for fixing the clamp ringas on the book and consequently fixation of the Spannhülaa having on the drill during the rotation of the Bohrera.

The socket as part of the adapter sleeve has on their end opposite the stop collar is distributed three or four axially and at an acute angle on the circumference running slots over a certain length.

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So that the clamping ring on the bushing recognizes fBStleufen, are the segments of the socket between dBn each Slits formed transversely to the axial direction and opposite to the drilling direction with a slight increase.

There is also the possibility that the segments are designed according to the diameter of the bushing and for the fixing of the clamping ring in Geuitndöegang provided on the socket.

The stop collar of the adapter sleeve can be disc · - or valiantly formed leg. With pot-like training mostly the stop cantilever on sainar lateral surface axially ve sloping slits, in their extension pointing downwards in the direction of rotation of the clamping sleeve inclined guide plates arranged aind. the Slots in the stop collar and Lie Leitblachs are used for the removal of the dust and the machined material,

Finally, it should be admonished that the clamping sleeve, Consists of a socket and stop collar, and the separate clamping ring made of metal, light metal or plastic are.

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The following description serves to explain the counter-statement according to the innovation, of which there are also mentioned examples are shown in the drawing. It shows:

Fig. 1 shows a drill, on dom a clamping sleeve is attached with a clamping ring;

Fig. 2 shows another exemplary embodiment Adapter sleeve;

3 shows the clamping sleeve from FIG. 1 in an enlarged and relaxed state;

FIG. K shows a front view according to FIGS. 3 and Flg. 5 shows the clamping sleeve from FIGS. 3

and k in the rear view with clamping ring and indicated twist drill.

In FIG. 1, the clamping sleeve 1 is located on a twist drill β clamped in the drill chuck 9. The clamping sleeve 1 consists of a bushing 2 and a stop collar flanged to the same 2 on one side

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A separate clamping ring k is slipped onto the book 2. Several slots 5 are made in the bush 2 itself at the free end. The slots 5 run axially and are formed at an acute angle in the direction towards the stop rain 3. Furthermore, the outside diameter of the bushing 2 tapers slightly in the direction of the stop claws 3. ^{The segments 2 1 of} the socket 2 lying between the slots 5 are designed to rise transversely to the axial direction, the gradient running in the opposite direction to the direction of travel. The meaning of the segment formation will be discussed in more detail later. The inner diameter of the clamping sleeve 1 and the stop collar 3 are dimensioned so that drill diameters of up to 0.5 mm difference can be accommodated.

The stop collar 3 can be pot-shaped, as shown in Figure 1, be designed or have a disk shape, see Figure 2. In the case of the pot-like design The same 3 slots 6 are introduced on the shell side. In extension of these slots 6 are located downwards and in the direction of rotation inclined guide or baffle plates 7th

The clamping sleeve 1, formed from parts 2 and 3, and the clamping ring k are made of metal, light metal or duro-

plastic plastic.

The application of the contradicting item is uiie follows:

The clamping sleeve 1 with the clamping ring is attached to the drill bit β according to the desired drilling depth. The depth corresponds to the distance from the cutting edge B ^{1 of} the drill 8 to the stop collar 3. In the exemplary embodiment according to FIG. 1, the set drilling depth is 25 mm. Once the drilling depth has been determined, the clamping ring h is pushed in the direction of the drill chuck 3. If the socket 2 has a slight conicity, the clamping sleeve 1 is jammed on the drill 8. If the hand drill is now switched on, the dBr clamping ring k is tightened on the socket 2 in the opposite direction to the bending direction and the clamping sleeve 1 is properly fixed on the Drill Θ. For this so-called sticking of the clamping ring a k on the socket 2 , the segments 2 'between the slots are designed to rise slightly transversely to the axial direction. The slope runs in the opposite direction to the direction of the drill 8.

With the SBgmBntan 2 ¹ between the slots 5 one can say that the same 2 ^{1 is} a so-called hydrofoil

show profile. Instead of the rising segments 2 ', the socket 2 can also be provided with a single pitch. The Geuindegang has the same effect as the segments 2 ¹ .

In the last phase the dBB drill hole becomes pot-like Formation of the stop collar 3 of the drilling dust and dae machined material discharged through the slots 6. BbI The guide or baffle plates 7 establish this discharge an aid. With a slight stop of the collar 3 on the drilled object is the predetermined one Drilling depth reached and the drilling process is ended.

It goes without saying that the rotating stop collar 3 not on polished flat), wallpaper or the like. Here the drilling process takes place shortly before the Touch ended. If necessary, the EinatellmaB in these cases, dimension a little larger for the driving depth became.

After completion of the drilling process, the clamping ring k

manually moved in the direction of the stop collar 3, whereby the clamping effect of the clamping sleeve 1 is canceled. To the impressive

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For handling, the clamping ring k is coated with liner knurling k ^l Dd. The like. The relaxed HQIbb 1 can now be removed from the drill θ or fixed for a different drilling depth.

The fee level of the innovation can be in various ways modified and varied without affecting the Rahman of the invention to exceed.

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Claims (1)

Protection claims 1. Device for determining the drilling depth in blind bores with the covering of metal, stone or wood drills, characterized by a clamping sleeve (1) which beatBht from a slotted bushing (2) with a bearing collar (3) arranged on one side, this bushing ( 2) running from the collar (3) to the other end has a slightly tonic increasing diameter and that on the beech (2) a separate clamping ring (<+) with a shell side on knurling (If ¹ ) is arranged, with the bushing (2) on the shell side Means (1 ¹ ) for fixing the clamping ring (Ό on the book (2) and consequently fixing the clamping surface on the drill (5) by means of the rotation of the drill (5)). 2. Device according to claim 1, characterized in that that the socket (2) on your dtmJtoegva (3) opposite end on the circumference distributed three or four axially and acute-angled slots (5) has over a certain lunge. - 12 - • «I - '■ - 12 - 3 «. Warrichtung neJi the claims 1 and Z, characterized in that the means for fixing the clamping ring BB (Ό on the bushing (Z) in the form of between the slots (5) and over the length thereof, transversely to the axial direction and opposite to the direction of travel lBicht rising segments (1 ¹ ) are formed. k. Device according to claims 1 and 3, characterized in that the means for fixing the clamping ring & (.k) on the socket (2) is in the form of a linkage B extending along the length of the socket (2). 5. Device according to claims 1 and Z ₁ , characterized in that the stop collar (3) of the clamping sleeve (1) is designed like a disk or a pot. 6. Device according to claims 1, 2 and 5, dfi characterized in that the cup-like formed AnschlajkragBn (3) on its MantexflSche (3 ¹ ) axially or obliquely extending slots (6) and in an extension of the same (6) downward iron, in the Umiiößrichtung of the clamping sleeve (1) inclined guide plates (7) for the removal of the drilling dust cd. like. aufueist. - 13 - 7. Device according to claims 1 to 6, characterized in that the clamping sleeve (D ₁ consisting of bushing (2) and stop rings (3), and the separate clamping ring (4) are made of metal, light metal or plastic.