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US 2009/0199835 A1Published application
Cutting or sawing machine
AssigneeAktiebolaget Electrolux
InventorsOve Donnerdal, Hakan Pinzani, Mari Albinsson
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AssigneeAktiebolaget Electrolux
InventorsOve Donnerdal, Hakan Pinzani, Mari Albinsson
Estimating the term…
A cutting or sawing machine (1) comprising a machine body (3), at least one disc shaped, rotatable tool (16a, 16b), an elongated tool carrier (14) having the substantial shape of a flat bar having a front end and a rear end, two opposite broad sides and two opposite edge sides, said rear end being connected to the machine body. The tool carrier comprises at least two elongated side walls (24, 25), a first elongated side wall (24) on one broad side of the tool carrier, a second elongated side wall (25) on the opposite broad side, said first and second side walls being essentially parallel with each other, and the front part of either one of the side walls or of a possible central elongated member (25) between the first and second side walls is provided with a bearing hole (28a) intended to carry a bearing of sliding contact type or of rolling contact type, i.e. a rolling bearing, and the two side walls and the possible central member being connected to each other at a plurality of sites, and each side wall (24, 25) has a length adapted to essentially cover at least the gap between the machine body (3) and the perimeter of its associated disc shaped tool (16a, 16b), i.e. the tool located on the same side of the tool carrier, so that from each broad side the side wall (24, 25) and the associated disc shaped tool together cover the power transmission to increase safety and reliability.
A cutting or sawing machine (1) comprising a machine body (3), at least one disc shaped, rotatable tool (16a, 16b), at least one rotatable driving member (102a,102b) having a centre of rotation (29) which is coaxial with the tool, an elongated tool carrier (14) having the substantial shape of a flat bar having a front end and a rear end, two opposite broad sides and two opposite edge sides, said rear end being connected to the machine body, said at least one tool being rotatably mounted in said front end, and a power transmission (72) for rotation of the tool via said driving member, characterized in that the tool carrier comprises at lest two elongated side walls (24, 25), a first elongated side wall (24) on one broad side of the tool carrier, a second elongated side wall (25) on the opposite broad side, said first and second side walls being essentially parallel with each other, and the front part of either one of the side walls or of a possible central elongated member (23) between the first and second side walls is provided with a bearing hole (28a) intended to carry a bearing of sliding contact type or of rolling contact type, i.e. a rolling bearing, and the two side walls and the possible central member being connected to each other at a plurality of sites, and each side wall (24,25) has a length adapted to essentially cover at least the gap between the machine body (3) and the perimeter of its associated disc shaped tool (16a, 16b), i.e. the tool located on the same side of the tool carrier, so that from each broad side the side wall (24,25) and the associated disc shaped tool together cover the power transmission to increase reliability and possibly safety.
A cutting or sawing machine (1) of the type which comprises a machine body including a power source, a tool assembly including two disc shaped, rotational cutter blades (16a, 16b), one on each side of an elongated tool carrier (14) having a rear end which is connected to the machine body and a front end in which the cutter blades are rotationally mounted, and a power transmission (72) for rotation of the cutter blades, the edge portions of which form the working parts of the cutter blades, said edge portions having first, inner sides which face one another, and second, outer sides which define planes which form the limits of the, in the axial directions, maximally projecting parts of the tool assembly as well as of at least a major part of the tool carrier, allowing the complete tool assembly and said at least major part of the tool carrier to be entered into a groove established in a working object after removal of material between the two parallel kerfs made by the two rotational cutter blades, characterized in that it is provided with at least one tool guard belonging to any of the following first and second types, wherein the first type blade guard is a blade guard (18a,18b) which is mounted on the tool carrier (14), adjacent to the tool assembly (15) and has a width, i.e. extension in the axial direction, which is smaller than the distance between said second, outer sides of the edge portions of the cutter blades and hence also smaller than the width of said groove, allowing the first type blade guard to be entered into said groove, and wherein the second type blade guard is a blade guard (19) which is pivotally mounted to the tool carrier or the machine body and turnable about a turning centre (83) adjacent to the rear end of the tool carrier and has a width which is larger than said distance between said second, outer sides of the edge portions of the cutter blades, preventing the blade guard of said second blade guard type from entering said groove but allowing a tip portion (86) of it to slide against the outer surface of the working object when the tool assembly has entered the working object to a certain depth, turning said second type blade guard rearwards in said hinge.
A bearing unit including a sliding contact bearing or preferably a rolling bearing (91) and a holder (92) in the form of a circular ring, characterized in that the holder ring has a first end surface in a first end of the ring, a second end surface in the opposite end, an inner side (96) which is cylindrical and extends between said first and second end surfaces, a flange (97) in said first end extending radially outwards, that an outer side section of the holder ring, extending between said flange and said second end surface, is cylindrical and at least partly threaded (98), and
A screw and nut coupling, characterized in that one of said coupling members (120, 121) has at least one protrusion (122) on the side facing the other member, laterally displaced relative to the threaded part of the member, said protrusion extending in the axial direction towards the other member.
A tool unit including a disc shaped rotational cutter blade and a split driving wheel half secured, co-axially to one side of the cutter blade, wherein the driving wheel half has a protruding central portion, said central portion having an end wall, said end wall having a flat, circular end surface, a central, first hole and at least a second hole which is laterally displaced relative to the first, central hole.
An assembly of mechanical machine components, including a split driving wheel (101) (pulley) and a rolling bearing (91), said split driving wheel comprising two driving wheel halves (102a,b) which are assembled by means of a clamping screw (120) and nut (121) coupling, clamping said rolling-contact bearing between them, characterized in that each driving wheel half has a central portion (114a,b) with a flat end surface (119a,b), that the central portions of the two driving wheel halves protrude towards one another, that an annular surface (115a,b) surrounding each of said central portions is pressed against an inner rolling bearing ring (94) on either side of said rolling bearing, causing said clamping of the rolling bearing, and that there is a gap (136) between said flat end surfaces which face one another.
Dependencies are inferred from the claim text.