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US 5,159,168 AGranted
Sliding contact roller head
AssigneeElpatronic AG
InventorsNiklaus Portmann, Alfonso D'Aniello, Peter Taiana, Werner Urech
Life of this patent
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AssigneeElpatronic AG
InventorsNiklaus Portmann, Alfonso D'Aniello, Peter Taiana, Werner Urech
Estimating the term…
A roller head (10) for a resistance seam welding machine has an internally located sliding contact current transmission device (24) between stator 12) and rotor (14) and is composed of a pair of circular ring-shaped discs (26, 26') which extend radially between rotor and stator, are fastened to the rotor on their outer circumferences, carry axial sliding contact rings (32,32') on their inner circumferences, and are flexible designed in their intermediate parts (28,28') between inner and outer circumferences. These sliding contact discs (26,26') are composed of a copper mesh, to which the axial sliding contact rings (32,32') are fastened. Thin-walled metallic diaphragms can also be used instead of the copper mesh. The roller head (10) can transmit high welding currents. As a result of the flexible design of the sliding contact discs (26,26') the contact presssure, which is created by a stack of plate springs (40), remains constant even with external mechanical influences.
Roller head for a resistance seam welding machine, having a stator assembly, an electrode roller which is rotatably mounted as a rotor assembly on the stator assembly, a sliding contact current transmission device which is arranged between the stator and rotor assemblies and is pressed by spring force against at least one of the assemblies and fluid ducts for passage of a coolant in the stator assembly, rotor assembly and sliding contact current transmission device, characterized in that the sliding contact current transmission device comprises at least one circular disc, which extends radially between the rotor and stator assemblies, has a radially inner and a radially outer circumference and is flexibly designed in its intermediate part between the inner and outer circumferences.
Roller head for a resistance seam welding machine, having a stator assembly, an electrode roller which is rotatably mounted as a rotor assembly on the stator assembly, a sliding contact current transmission device which is arranged between the stator and rotor assemblies and is pressed by spring force against at least one of the assemblies and fluid ducts for passage of a coolant in the stator assembly, rotor assembly and sliding contact current transmission device, characterized in that the sliding contact current transmission device comprises at least one circular disc, which extends radially between the rotor and stator assemblies, has a radially inner and a radially outer circumference and is flexibly designed in its intermediate part between the inner and outer circumferences, the disc is provided on at least one of the inner and outer circumferences with a contact ring and is fastened at the other of the inner and outer circumstances to one of the stator and rotor assemblies, the contact ring is in axial sliding contact with an annular contact surface of the other of the rotor and stator assemblies;
Roller head for a resistance seam welding machine, having a stator assembly, an electrode roller which is rotatably mounted as a rotor assembly on the stator assembly, a sliding contact current transmission device which is arranged between the stator and rotor assemblies and is pressed by spring force against at least one of the assemblies and fluid ducts for passage of a coolant in the stator assembly, rotor assembly and sliding contact current transmission device, characterized in that the sliding contact current transmission device comprises two circular discs, which extend radially between the rotor and stator assemblies, each disc has a radially inner and a radially outer circumference and is flexibly designed in its intermediate part between the inner and outer circumferences, each disc is also provided on at least one of the inner and outer circumferences with a contact ring and is fastened at the other of the inner and outer circumstances to one of the stator and rotor assemblies, each contact ring is in axial sliding contact with an annular contact surface of the other of the stator and rotor assemblies, a spring device is arranged on that side of each contact ring which faces away from the annular contact surface in order to produce a spring force applying contact pressure to the disc, the spring device includes a stack of spring plates, and the stator assembly is designed as a bipartite axle with two annular collars having surfaces facing each other as well as the two contact rings on the discs, and the rotor is a single part having an inner circumference with a flange to which the two discs are fastened.
Dependencies are inferred from the claim text.