| 主权项 |
1. A release assembly of a drilling tool for rock and overburden drilling, the release assembly arranged to be axially located between two drilling tool components connectable together at a joint by connecting threads; the release assembly comprising:
a first counter element and a second counter element, the first counter element and the second counter element being counter surfaces, which are facing each other, at least one of the first and second counter elements arranged in an intermediate component separate from the drilling tool components, the intermediate component having a contact surface facing the drilling component; and a release mechanism formed between the first counter element and the second counter element, the release mechanism allowing an axial length of the release assembly to be shortened in response to turning the connecting threads of the joint in an opening direction, wherein the connecting threads of the joint have a first handedness; and at least one inclined flank surface on the first counter surface and second counter surface, the at least one inclined flank surface having a second handedness opposite to the first handedness of the connecting threads, whereby the release assembly is arranged to be lengthened when the first counter surface and the second counter surface are turned relative to each other in a closing direction of the first handedness, and arranged to be shortened when turned in an opening direction of the first handedness. |
