One example embodiment is an apparatus including a ring assembly and a contact assembly. The ring assembly includes a conductive ring having a conductive ring engagement surface. The contact assembly includes a contact block and a contact element having a contact element engagement surface. The contact element is connected with the contact block. The contact element forms a loop around the conductive ring between the ends of the contact element. The contact element engagement surface is engaged with the conductive ring engagement surface along an electrical contact section of the loop. Another example embodiment is a method for assembling a slip ring.

A testing device for a current-carrying friction and wear performance of a flexible rolling friction pair, including a base plate, supporting profiles, and guiding rail sliders, and a screw assembly, and a movable supporting plate, and a fixed supporting plate, and first bearing supports, and a slider supporting plate, during the testing process, friction moment and friction force of the flexible rolling electrical contact component can be obtained by monitoring dynamic torque of rotating wheel, which is wide applicability, which allows simultaneous online monitoring of multiple experimental variables such as friction performance, current-carrying capacity, preload, friction force, and temperature; and at the same time, there is no need to adjust, assemble, or test multiple objects for the rolling ring structure; the testing process can be completed by only adjusting and testing the key electrical contact test piece, significantly simplifying the testing structure and method while reducing testing costs.

A slip ring comprises a first support body; and a first electric interface associated with said first support body. A plurality of conductive rings fixedly mounted on said first support body and a plurality of first electric tracks in electric connection with said first electric interface and fixedly mounted on said first support body are provided. A plurality of electric contacts, each electric contact being electrically connected to a respective first electric track is provided. A second support body rotatably coupled to said first support body about an axial rotation axis and a second electric interface associated with said second support body and configured to be electrically connected to a second electric component are provided. A plurality of electric brushes fixedly mounted to said second support body and electrically connected to said second electric interface is provided wherein each brush is arranged in sliding contact with a respective conductive ring.

A slip ring comprises a first support body; and a first electric interface associated with said first support body. A plurality of conductive rings fixedly mounted on said first support body and a plurality of first electric tracks in electric connection with said first electric interface and fixedly mounted on said first support body are provided. A plurality of electric contacts, each electric contact being electrically connected to a respective first electric track is provided. A second support body rotatably coupled to said first support body about an axial rotation axis and a second electric interface associated with said second support body and configured to be electrically connected to a second electric component are provided. A plurality of electric brushes fixedly mounted to said second support body and electrically connected to said second electric interface is provided wherein each brush is arranged in sliding contact with a respective conductive ring.

Method for manufacturing a 3D electromechanical component, having at least one embedded electrical conductor, comprising the steps consisting in: implementing an additive manufacturing operation for building an electrically conductive skeleton of the 3D electromechanical component including a structural hull and at least one conductive wire at least partially located inside the structural hull and having first and second ends, at least one of which is mechanically linked to the structural hull; filling the structural hull with an insulating material provided in a state in which it exhibits liquid-like behaviour; implementing a solidification step to provide a solid-like behaviour of the insulating material, the latter thus embedding at least partially an electrical conductor.

Method for manufacturing a 3D electromechanical component, having at least one embedded electrical conductor, comprising the steps consisting in: implementing an additive manufacturing operation for building an electrically conductive skeleton of the 3D electromechanical component including a structural hull and at least one conductive wire at least partially located inside the structural hull and having first and second ends, at least one of which is mechanically linked to the structural hull; filling the structural hull with an insulating material provided in a state in which it exhibits liquid-like behaviour; implementing a solidification step to provide a solid-like behaviour of the insulating material, the latter thus embedding at least partially an electrical conductor.