DE7529069U - CHISEL HOLDER - Google Patents

Description

Usage pattern registration

UGINE CARBONE 92, rue Ampere

58 ORENOBLE - GARE / France

Chisel holder

The invention relates to a chisel holder with a bore for receiving a chisel shank, the bore being formed a shoulder bearing into a widened and a tapered one Bohrungsabsohnitt and the chisel shank to form a bearing shoulder in an enlarged and a tapered shank section are divided. - Such chisel holders are known in various embodiments. In the known embodiments extremely high surface pressures occur when the chisel is in use. These surface pressures lead to premature wear and tear, especially in the transition area of the exposed shaft section and in the drilling

7529069 02/05/76

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Andrejewski, Honke, Gesthuysen & Masch, patent attorneys in Essen

tion located shaft section or in the transition area between the bore and the holder surface. Polglich is soon more impeccable Seat of the chisel shaft in the chisel holder is no longer guaranteed; Dimensions. This results in a loose fit, reduced cutting performance and ultimately serious malfunctions, e.g. B., Chisel holder torn out and chisel lost. Also the penetration of dirt into the knocked out hole is to be feared what assembly difficulties with brings itself. The invention aims to avoid these disadvantages.

The invention is based on the object of creating a chisel holder in which there are signs of wear and soiling in the shaft / borehole area despite extremely high Surface pressures can be reduced to a minimum.

This object is achieved by the invention in a chisel holder of the generic type in that the chisel shank surrounds it Has support ring and is supported with the support ring against the chisel holder - these measures of the invention result in that a knocking out of the hole in the chisel holder is no longer to be feared, especially since the chisel shank through the support ring can be fixed without moving play. In addition, the penetration of dirt into the bore is now excluded, because the support ring forms, as it were, a sealing collar in the transition area from the chisel shank to the bore.

7529069 05.Ii76

Andrejewslci, Honlce, Gesthuysen & Mosch, patent attorneys in Essen

Further features essential to the invention are listed below. Thus, the invention provides that the support ring is releasably attached to the chisel shank by means of an adhesive fit. Under custody, a frictional connection should be used here Seat can be understood. The chisel shank can preferably have an annular shoulder as an abutment for the support ring. The support ring is expediently designed as an armored ring and has an upwardly conical taper. - In principle, the chisel holder according to the invention can be based on a shoulder bearing in the hole for the chisel shank can also be dispensed with, e.g. B. when the chisel shank with its ring shoulder is supported against the chisel holder with the interposition of the support ring.

The advantages achieved by the invention are essentially to be seen in the fact that a chisel shank is realized which the proper fixation of the chisel shaft in its bore is guaranteed, so that this bore is no longer knocked out it is to be feared, consequently perfect and permanent functionality is guaranteed. At least there is no more danger that the chisel will eventually tear out. Any risk of contamination is also averted because of the chisel shaft tightly enclosing support ring fulfills the function of a sealing ring. The support ring can be made of armored steel, and The result is perfect holder protection against wear and soiling.

7929069 05.1276

Andrejewski, Honlce, Gesthuysen & Masch, patent attorneys in Essen

In the following the invention is explained in more detail with reference to a drawing showing only one embodiment; it show ⁴ enough?

1 shows a chisel holder according to the invention with a shoulder bearing and

Pig. 2 the object of FIG. 1 without shoulder bearing.

In the figures, a chisel holder 1 is shown with a bore 2 for receiving a chisel shank 3, wherein according to FIG a tapered shaft portion are divided. The chisel shank 3 has a support ring 6 surrounding it and is supported with the support ring 6 against the chisel holder 1. A loose fit can be implemented between the chisel shank J> and the support ring 6, but the support ring 6 is preferably fixed on the chisel shank 3 by means of an adhesive fit. - Fig. 2 shows an embodiment according to which the chisel shank J> rests against it with an annular shoulder 7 as an abutment for the support ring 6. The support ring 6 is designed in both cases as a conically tapering ring upwards and can be designed as an armored ring, for. B. made of steel with hard metal armor.

7529089

Claims (4)

Andro | «wski, Honk ·, Gesthuyson & Match, patent attorneys in Essen Sohutz claims: 1. Chisel holder with borehole for receiving a chisel shank, wherein the bore to form a shoulder bearing in a enlarged and a tapered borehole sub and the Chisel shank with the formation of a Lagorso shoulder in an enlarged and a tapered Sohaftabohnltt are divided, characterized in that the chisel shank (J5) has a supporting ring (6) surrounding it and with the support ring (6) is supported against the chisel holder (1). 2. Chisel holder according to claim 1, characterized in that the support ring (6) is fixed on the chisel shaft (5) by means of an adhesive fit. 3. Chisel holder according to claim 1 or 2, characterized in that that the chisel shank (5) has an annular shoulder (7) as an abutment for the support ring (6). 4. Chisel holder according to one of claims 1 to 3, characterized in that that the support ring (6) is designed as an armored ring is. 5. Chisel holder according to one of Claims 1 to 4, characterized in that that the support ring (6) has an upwardly conical taper. 7529069 05.ei76