DE2618335A1 - Coal pick and support block - has stems of main and auxiliary picks fitting into recesses in support - Google Patents

Abstract

The coal pick for a mining machine is retained inside a hollow block (10) which has ribs (12) on the inside faces, behind which hammer head shaped bases of the coal picks (14, 14') fit. The cutting heads (15) are larger, to be supported by the top run of the block. Both a coal pick (14) and a reserve coal pick (14') are fitted into the block. They are secured by heave dowel pins which fit into holes through the narrow neck region between the heads and the hammer shaped parts.

Description

lead for coal planer or the like.

The invention relates to a chisel for coal planer or the like. That Is formed in several parts and has a chisel head and a pocket-like receiving element having.

Multi-part chisels have the advantage that the one carrying the cutting edge and so that the part exposed to wear can be replaced quickly. With wear the cutting edge does not need to be replaced with the entire chisel, but rather only the lighter chisel head. Chisels of the aforementioned type have been around for years with success in underground mining operations.

All known proposals concern the attachment of the Hot items in the pocket of the receiving element, as the hot item is securely attached in the pocket as well the quick replacement of the same of the greatest Importance is. In one popular proposal, the chisel was replaced by a self-locking one Secured wedge and engages with a tick in corresponding recesses of the Bag a.

The task of the invention is to create a coal chisel that is easily exchangeable in the pocket and securely fastened in the same.

To achieve this goal, the invention suggests that the pocket-like Receiving element has bead-like ribs on both side walls, which are hammer-head-like Thickenings of the chisel can be grasped from behind. The chisel is taken from a second serving as a reserve chisel in the pocket-like receiving element and / or a Bridge plate supported, the chisels are in the pocket by bolts, locking pins or the like. Braced against each other.

The advantages of the invention can be seen in the fact that the chisel through a chisel serving as a reserve and / or a correspondingly designed pressure plate, which engages in a wedge shape in the pocket, is held, which or which as a result of it wedge-shaped training is easily detachable. iNacSl The hard metal cutting edge becomes unusable of the chisel, it can be replaced immediately by the chisel located behind, whereby the unusable chisel serves as a pressure plate.

In the drawing is the counter stand of the invention in one embodiment shown; It show t. 1 is a perspective view of the pocket-like receiving element with the chisels and ig removed, Figure 2 is a perspective view of the pocket like receiving element with inserted chisels.

The pocket-like receiving element lo points in front of the insertion opening 16 of the chisels 14, 14 'have a fastening opening 17, which is formed by bead-like ribs 12 is narrower than the insertion opening 16. behind the bead-like ribs 12 of the fastening opening 17 engage the hammer head-like thickenings 13 of the Chisel 14 or when changing that of the chisel 14 '. The chisels 14, 14 'are in their Cut surfaces fitted with hard metal plates 15.

in figure 2 the bit is shown in the operating condition, i.

it is located in the pocket-like receiving element 11.

Both chisels 14, 14 'point at their rear face a common half-hole 15, both half-holes correspond to one Normal bore so that a bolt 18, locking pin or the like is hammered into it can be. The bolt 18 or the like. Tension both chisels 14, 14 'or chisels 14 with pressure plate in the pocket so that only after releasing the same the rear Chisel 14 'first and then the chisel 14 lying in the cutting direction can be removed from the bag. Both chisels 14, 14 'or

Chisel 14 and pressure plate have a transverse bore 19 for knocking out with the help of a mandrel or the like. Basically, the knockout is first the backward chisel 14 'or the pressure plate and only then is the in: 3cilnittrichtung horizontal chisel 14 moved backwards for removal.

References taken into account in the prior art: DBP 1 239 647 and 1 291 708 and Offenlegungsschrift 24 o5 366 and 24 37 361 as well as our own and therefore not a novelty-damaging publication in the magazine Glückauf from February 19, 1976, page 151.

Claims (3)

P A T E N T A N S P R U C H E 1. Chisel for coal planer or similar, which is made in several parts and has a chisel and a pocket-like receiving element in which the chisel partially engages, d u r c h g e k e n n -z e i- c h n e t that the pocket-like receiving element (io) on both side walls (11) Has bead-like ribs (12), the hammer head-like thickenings (i3) of the Chisel (14) are engaged from behind. 2. Chisel for coal planer or the like., According to claim 1, d a d u r c h e k e n n n e i c h n e t that the chisel (14) from a second as a reserve serving chisel (14 ') in the pocket-like receiving element (io) and / or a Pressure plate is supported. 3. Chisel for coal planer or the like. According to claims 1 and 2, d a d u r c h e k e n n n z e i c h n e t that the chisel (14, 14 ') in the pocket through Bolts, locking pins (18) or the like. Are braced against each other.