摘要:
Bei einer Anordnung zur Festlegung eines Meißels an einem Schrämwerkzeug einer Schrämmaschine mit einem Meißelhalter und einer durch Flächenpressung in einer konischen Aufnahme des Meißelhalters gegen einen axialen Anschlag lösbar festgelegten rotationssymmetrischen Meißelbüchse, wobei die Meißelbüchse eine die axiale Länge der Aufnahme für die Meißelbüchse übersteigende axiale Länge hat, weist der im festgelegten Zustand den Rand der Aufnahme (5) überragende Teil der Meißelbüchse (2) an seinem Außendurchmesser eine nach innen geneigte konische Anfasung (10) auf.
摘要:
The invention relates to a pick (10), in particular a round shaft pick having a pick head (13) and a pick shaft (11), a securing sleeve (20) being mounted in the region of the pick shaft, and a support element (30) comprising a guide region (36) being associated with the pick. According to the invention, in order to be able to dismantle the pick (10) easily from the pick holder (46) and optionally to be able to refit it easily again, the support element (30) comprises a deflection section (36.1) in the region of its underside remote from the pick head (13).
摘要:
The purpose of the design is to protect a rotating cutting insert from getting out of a holder used in winning machines in the mining industry or in machines used at road constructions. The clamp is made from wire (of random section bent in loops) (2, 4) and recesses (3), while ends (5) of loops (4) are hooked towards the center of a figure formed by the bent wire. Points (s) of the recesses (3) and faces (6) are so distributed that a circle of diameter (d) can be inscribed between them. The diameter (d) is correspondent to the bottom (7) of the groove (8) of the holder (9) of the rotating cutting insert (12).
摘要:
The invention relates to the mining industry, in particular to a cutting tool for breaking mineral and artificial materials. The inventive tool comprises a working head provided with a hard-alloy insert on one end thereof and a three-part stem on the other end. A clamping sleeve made of elastic material is arranged on the second part of the stem and provided with a stopping element in order to prevent said sleeve from the displacement thereof longitudinally with respect to the stem. A protective element provided with a through hole, in which the first part of the stem can be accommodated, is disposed at a distance ranging from 0.6 to 0.85 of the length of the clamping sleeve with respect to the end of said sleeve oriented towards the working head along the longitudinal symmetrical axis of the tool, the diameter of the first part of the stem is larger than the diameter of the third part thereof. Said invention makes it possible to improve the operating reliability of the tool by reducing the deformation of the clamping sleeve by the protective element by shaping said clamping sleeve in such a way that it is conical.
摘要:
A power rake attachment includes a rotary drum and a plurality of bit assemblies mounted on an outer surface of the drum. Each bit assembly includes a hollow holder affixed to the other surface, and a cutter bit disposed in the holder. The cutter bit includes a front cutting heat and a rear shank. The shank extends into the holder, and the cutting head projects longitudinally past a front end of the holder. A retainer retains the shank within the holder, and wear sleeve is disposed around an outer surface of the holder. The cutter bit includes a laterally outwardly projecting sleeve-retaining portion which extends laterally past the outer surface of the holder and into overlying relationship to a front end of the holder to retain the wear sleeve longitudinally on the holder.
摘要:
The invention relates to a tool for a street milling, coal-cutting, mining machine or the like which comprises a chisel (10) with a chisel head (11) and a chisel stem (15). Said chisel stem (15) is rotatably mounted in a receiver (23) of a chisel holder (20). A perforated (35) wearing protection element (30) is mounted on the chisel stem (15), and the chisel head (11) sits closely on the chisel holder (20) while embracing the interposed wearing protection element (30). The aim of the invention is to improve the wearing protection behavior of such a tool. To this end, the inventive wearing protection element (30) comprises one or more spring elements (32) that elastically support the chisel head (11) vis-à-vis the chisel holder (20).
摘要:
An assembly that includes a rotatable cutting tool (22) and a tool holder (24). The rotatable cutting tool has an integral enlarged dimension portion (48) mediate which has a periphery (50) and a rearwardly facing surface (52) which defines a generally planar shoulder. The tool holder includes a bore (74) and has an integral mating surface (88) which surrounds the forward end of the bore. The mating surface has a peripheral edge (90). The rotatable cutting tool is rotatably retained in the bore of the tool holder body so that the shoulder (52) of the elongate cutting tool body contacts the mating surface (88) of the tool holder body and the periphery of the enlarged dimension portion of the elongate cutting tool body extends radially outwardly past the peripheral edge of the mating surface.
摘要:
An assembly that includes a rotatable cutting tool (22) and a tool holder (24). The rotatable cutting tool has an integral enlarged dimension portion (48) mediate which has a periphery (50) and a rearwardly facing surface (52) which defines a generally planar shoulder. The tool holder includes a bore (74) and has an integral mating surface (88) which surrounds the forward end of the bore. The mating surface has a peripheral edge (90). The rotatable cutting tool is rotatably retained in the bore of the tool holder body so that the shoulder (52) of the elongate cutting tool body contacts the mating surface (88) of the tool holder body and the periphery of the enlarged dimension portion of the elongate cutting tool body extends radially outwardly past the peripheral edge of the mating surface.
摘要:
The invention relates to a solution for mounting a rotatable chisel in mining machinery. According to the invention, the shaft (6) of the chisel (4) comprises a projection configured as a journal (7) that is preferably slanted on both sides with faces (9) and (10). A friction ring (23) provided with faces (25) also on both sides is fitted on the journal (7). After inserting the chisel into the chisel retainer (1), the friction ring (23) rests with the outer surface (24) thereof against the hole (2) of the chisel retainer (1). The diameter (D2) of the journal (7) is smaller than the diameter (D1) of the shaft (6), and the final edges (30) of the friction ring (23) are arranged in the recess (11) on one side and in the groove (12) on the other side. The invention is primarily for use in combined machinery for extracting coal and in road construction machinery.
摘要:
The invention relates to a chisel arrangement for a round shank chisel (4), which arrangement provides for a chisel bushing (3) with an outer casing having a conical zone (8). The chisel bushing (3) also has a stop (6) engaging over the location bore (2) of the chisel holder (1). The chisel bushing (3) can also be screwed into the location bore (2) of the chisel holder (1) by way of a thread (9) with a large degree of axial play. A cylindrical end section (10) is provided on the chisel bushing (3) to counteract radial forces.