DE2806725C2

DE2806725C2 - Cross blade drill for insertion into pipelines

Info

Publication number: DE2806725C2
Application number: DE19782806725
Authority: DE
Inventors: Horst 6000 Frankfurt Klünder
Original assignee: Individual
Current assignee: Rak-System Horst Kluender 63667 Nidda De GmbH
Priority date: 1978-02-17
Filing date: 1978-02-17
Publication date: 1986-12-11
Also published as: DE2806725A1

Claims

1 2

tem drill blade;

Claim: F i g. Figure 2 is a top view of the drill with the rivets

th drill blades;

Cross-blade drill for insertion into pipelines. F i g. 3 is a side view of a single drill blade;

gen with an elongated body with a 5 and

rear end, which with a fastening device- Fig. 4 is a plan view of a right-angled folded

device for attaching to, for example, a flexible th drilling blade.

Shaft is provided with a front end, the As Fig. 1 shows, the drill consists of a

one in the longitudinal direction of the base body, which is integrated in the longitudinal direction of the base body 1 and which is shown in FIG. 2 has a zylindribeiteten cross slot into which a pair of 10 See shape and a centrally disposed bore 6 has two wings having Bohrblättern mono- The base body has the front side a truncated cone is set, wherein the base body in addition, a TA, and has four angularly of 90 ° radial to each other with the cross-slot contains coaxial bore, and standing in the longitudinal direction of the base body approximately folded down to the drilling blades and each in two adjacent ² I _{3 of} its length in these incorporated slots 2a, 26, te sections of the cross-slot are inserted, 15 2c, 2d, in which two drilling blades 3a, 36 are arranged, characterized in that the drilling is folded down at right angles at the folds la, Tb and blades (3, 3a, 3b) are held by a rivet (5), in which the correct section of the base body are inserted through the reil slots and the bore 6 in the common plane of symmetry. Drilling blades (3, 3a, 3b) \ n radial direction through the The drilling blades 3a, 3b are held by a rivet 5, base body (1) and the inside of the coaxial 20 which are in the common plane of symmetry of the drilling hole (6) against each other pointing fold lines (7a, sheets 3a, 36 in the radial direction through the base body 76 ^ of the drilling blades (3,33,36 ^ extends per 1 and the inside of the coaxial bore 6 against

facing fold lines 7a, 76 of the drilling blades 3a,

36 extends.

25 The F i g. 3 shows a shape of the Bohrbkttes 3 with im upper part truncated leaf end 8 and one in

The invention relates to a cross-blade drill arranged in the lower third of the drilling blade 3 Insertion into pipelines with an elongated 9 through which the rivet 5 is inserted Base body with a rear end, which with a Fig. 4 shows the right-angled at the fold line 4a or 46

Fastening device for attachment to, for example, 30 Hg folded drilling blade 3.

a flexible shaft is provided with a front

End, one in the longitudinal direction of the base body. For this purpose, 2 sheets of drawings

machined cross recess has in the a pair of

In each case two blades having drill blades are used, the base body also having one with 35
the cross recess contains coaxial bore, and the
Drill blades are folded down and each inserted into two adjacent sections of the cross recess.

Such cross blade drills are preferred
for milling out deposits in sewage pipe systems
Stars used.

From GB-PS 9 58 158 a cross blade drill is the
known type, in which the cross slots so
are deeply incorporated into the body that the
Drill blades completely taken up by the base body 45
men will be. At the front end there is a thread onto which a cap nut is screwed
the drill blades should hold.

From DE-PS 9 40 460 is a drill for milling
of deposits in sewer pipe systems known so
in which a single, unfolded drill blade in
a longitudinal slot arranged in a base body
introduced and by means of a screw that passes through the
Line of symmetry of the drill blade runs, is attached.

It is the object of the present invention to provide a cross 55
To create a drill of the type mentioned, in which the
Drill blades simply attached to the base body
can be without it being the case with the base body
requires a higher manufacturing effort.

The object is achieved in that the drilling blades 60
are held by a rivet, which extends in the common plane of symmetry of the drilling blades in the radial direction through the base body and the fold lines facing one another within the coaxial bore
the drill bit extends. 65

In the drawing, an embodiment of the invention is shown, namely shows
F i g. 1 a side view of the drill with inserted