DE2032472A1 - Holder for picks or similar cutting tools - Google Patents

Description

47 289

Greenside Machine Company Limited, Aycliffβ Industrial Estate, Darlington, County Durham (UK)

Holder for picks or similar cutting tools

The invention relates to a holder for pecking or the like Cutting tools and in particular a novel combination of a pick with a holder for the same, in particular for tunnel boring and head jacking machines.

The picks or other Söhneid tools carried by the cutting drum or cutting disk of a tunnel boring machine or head driving machine each have two cutting edges, one of which lies in one of the two possible directions of rotation of the cutting drum or cutting disk. Therefore, each pick or each cutting tool should be pivotable in its storage or holder. The ingress of dust or other contaminants into the storage should be prevented so that the free mobility of the pick or the cutting tool is not impaired. Similarly Weiae the penetration of water should be prevented, od to rusting. Like to avoid..

003884/156

The object of the invention is to achieve these goals. To solve this problem, a holder for pecking or similar cutting tools is provided according to the invention, which has a block which is provided on one side with a recess of part-circular cross-section and opens on an end face of the block, a swivelable one in this opening Holding block is fitted with sliding, which contains a passage so * opening or bushing for inserting a Pick® or other cutting tool, which protrudes with the cutting part from this holding block and the stationary block receiving the holding block. Bie side winds of the recess of the stationary block are configured so that a limited iiikelb ¥ @ w © supply of ver pivotable holding block with the eingesataiäen pick od _{0 o} the like in d © r recess is possible. The recess of the stationary block can be closed with the help of a cover plate to be attached to the open end face, so that the pivotable holding block is held in the desired manner in this recess.

According to a preferred embodiment of the invention, are Facilities provided with which bold or other Lubricant introduced into the interior of the bracket can be, with this grease the ingress of dust, The aim is to prevent dirt and water, which would otherwise prevent the on the sliding sound of sight and swiveling Haltublockes could eat together.

Preferably, the free end of the shaft of the pick or picks protrudes of

J other cutting tool in ®in @ ¥ ®rtieirag or additional recess exerts Hauptausn © iimuiig or the main cavity of the fixed block "As soon as the sheep tend © into contact with one or the other side wall of this depression reaches a further pivotal movement of the

009834/1884

2G32472

Holding block prevents so that the side walls of the additional Recess or depression as limit stops for the pivoting movements of the holding ^ block with the inserted Pick or the cutting tool used. Since the swiveling holding block with a tight sliding fit in the stationary block is housed, has the additional Recess or depression into which the free end of the picking body asks, no direct connection with the outside of the stationary block so that a filling or packing made of fat in the stationary block the penetration of dust, impurities or water into this additional recess is prevented and thus the pivotable holding block from seizing up within the stationary one Blocks.

Filling the holder with fat can be done in a simple manner be carried out with the help of a grease nipple, which is inserted into the additional recess or recess inside the fixed block opens.

In the drawing, an embodiment of a holder according to the invention is shown schematically, namely shows

Fig. 1 is an end view of the holder in a partially broken away representation and

FIG. 2 shows a cross section along line 2-2 from FIG. 1.

The holder according to the invention intended for pecking or similar cutting tools has a cast iron, im Injection molding or otherwise shaped fixed Block 1, which has a main cavity 11 with a partially cylindrical cross-section between two opposing

4/1564 ° ^RiGINAL

TeilEylindrisehen walls 12 and 13 contains. The main cavity 11 opens to the front of the block 1 and intersects the top of the block 1 & ₀ Iu, even after the top of the block ^ 1 open »An. the end of the main cavity opposite the top 15 of the block 1 is a recess or recess of the main cavity emanating from this main cavity »In the recess 16 also opens a bore which receives a lubricating nipple, so that the interior of the block 1 can be filled with grease.

In the main cavity 11 is a pivotable retaining block used, which has a partially cylindrical cross-section and is fitted between the walls 12 and 13 with a sliding fit. Dieeer pivotable Haltebloek 3 is by means of the cover plate 2 held in the main cavity 11 «, since the center of curvature of the main cavity 11 at a distance below the top 15 of the block 1 is, the retaining block 3 held in the stationary block 1 when the cover plate 2 has been attached. The walls 12 and 13 can never are exposed because the pivotable retaining block 3 to a distance beyond the top 15 of the block 1 protrudes, which is equal to or slightly greater than that during the pivoting movements possible distance of movement. Through this and because block 1 is filled with grease, it is ensured that no dust, dirt or water can penetrate into the block 1 during operation.

A cutting tool 4 designed as a pick with cutting edges 41 and 42 is inserted into a barrel hole y \ of the pivotable holding block 3, and this cutting tool can be driven into the fitting hole 31 with the aid of a hammer. In the fitting hole 31, the cutting tool 4 is with the help

009884 / 1S6A - 5 -

ORIGINAL INSPECTED

a pin 7 held, which is at least through the Holding block 3 extends and in the illustrated embodiment the holding block 3 and also the stationary block 1 penetrated in the axis of rotation of the holding block 3.

The shank of the cutting tool 4 "has an end 43 which protrudes into the recess 16 and with side walls 161 and 162 of the recess 16 can come into contact, whereby the Versehwenkbarkeit the holding block 3 with inserted Cutting tool 4 is limited.

In operation, the bottom 13 of the stationary block 1 welded to the cutting drum or the cutting disc. If the cutting drum or cutting disk is in direction A is rotated, the cutting tool 4 pivots as soon as it comes into contact with the surface to be machined, in direction B, so that the cutting edge 42 is used. Will If, however, the cutting drum or cutting disk is rotated in the opposite direction, the is pivoted Cutting tool 4 also in the opposite direction, so that the other cutting edge 41 is used.

Patent claims:

009894/1564

Claims (1)

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