Shearing screw
The disclosure relates to a shearing screw for clamping an electrical conductor within a cable connector. The shearing screw comprises a screw body for engaging the cable connector, which further comprises an outer thread and a clamping surface for clamping the electrical conductor within the cable connector. The screw body also comprises a collar and a groove for detaching the collar from the screw body, whereas the shearing screw comprises a nut for shearing the shearing screw. The collar and the nut are adapted to be rotatable simultaneously with a sleeve for fastening the shearing screw to the cable connector.
1. A shearing screw for clamping an electrical conductor within a cable connector, the shearing screw comprising:
a screw body for engaging the cable connector, the screw body comprising an outer thread and a clamping surface for clamping the electrical conductor within the cable connector;
characterized by the screw body comprising a collar and a groove for detaching the collar from the screw body; and the shearing screw comprising a nut for shearing the shearing screw, the nut being adapted to engage the outer thread of the screw body; wherein the collar and the nut are adapted to be rotatable simultaneously with a sleeve directly and simultaneously exerting force on both the collar and the nut.
2. A shearing screw according to claim 1 , wherein the collar and the nut are adapted to maintain a constant relative angular orientation with respect to each other during rotation when fastening the shearing screw.
3. A shearing screw according to claim 1 , wherein the outer diameter of the collar substantially coincides with the outer diameter of the nut.
4. A shearing screw according to claim 1 , wherein the outer sides of the collar are flat in the longitudinal direction and the outer sides of the nut are at least partially flat in the longitudinal direction.
5. A shearing screw according to claim 1 , wherein the collar has a polygonal outer boundary.
6. A shearing screw according to claim 1 , comprising a sleeve for simultaneously enclosing or enveloping, at least partially, and simultaneously rotating the collar and the nut.
7. A shearing screw according to claim 6 , wherein the sleeve has a polygonal inner and/or outer boundary.
8. A shearing screw according to claim 6 , wherein the length of the sleeve is larger than the length of the nut.
9. A shearing screw according to claim 6 , wherein the inner surface of the sleeve is adapted to exert pressure on the collar and/or the nut to prevent the collar and/or the nut from moving with respect to the sleeve by itself.
10. A shearing screw according to claim 6 , wherein the sleeve is adapted to be supported on the cable connector during clamping of the electrical conductor.
11. A shearing screw according to claim 1 , wherein the screw body has a continuous shearing surface along the length of the screw body for facilitating shearing of the shearing screw at any length within the continuous shearing surface.
12. A method for clamping an electrical conductor to a cable connector using a shearing screw according to claim 1 , the method comprising:
enclosing or enveloping, at least partially, both the collar and the nut simultaneously with a sleeve for rotating the collar and the nut;
rotating the sleeve to simultaneously rotate the collar and the nut to screw the screw body into the cable connector;
continuing to rotate the sleeve to break the shearing screw at the groove, thereby causing the collar to detach from the screw body;
continuing to rotate the sleeve until the nut engages the cable connector; and
continuing to rotate the sleeve to transmit a tensile force through the nut to the screw body, thereby causing a portion of the screw body to shear off.
13. A method according to claim 12 , comprising supporting the sleeve on the cable connector.