Device for fastening
View Patent ↗A device for fastening includes a threaded rod, a nut that can be screwed on the rod and elements for locking the nut in rotation in relation to the threaded rod including an intermediary ring mounted between a skirt of the nut and an end of the threaded rod, this ring including rotational coupling elements with the end of the threaded rod and rotational coupling elements with the skirt of the nut. The nut is elastically deformable to tightening during the screwing on the threaded rod.
1. Device for fastening comprising:
a threaded rod;
a nut that can be screwed on the rod; and
means for locking the nut in rotation in relation to the threaded rod comprising an intermediary ring mounted between the nut and an end of the threaded rod, this ring comprising rotational coupling means with the end of the threaded rod and rotational coupling means with the nut,
wherein the nut comprises a thinned portion which is elastically deformable to tightening during the screwing on the threaded rod, and
wherein the intermediary ring is assembled and immobilized in rotation in said thinned portion by the rotational coupling means with the end of the threaded rod and the rotational coupling means with the nut.
2. Device according to claim 1 , wherein the end of the threaded rod comprises at least one longitudinal protruding ridge, the radially internal edge of the ring being provided with a plurality of teeth or catches that can engage with this longitudinal ridge and defining a plurality of angular positions of the ring around the end of the threaded rod.
3. Device according to claim 2 , wherein the end of the threaded rod is an axial rod of reduced diameter, with polygonal external section.
4. Device according to claim 1 , wherein the radially external edge of the ring comprises at least one lug extending radially towards the exterior, that can engage in at least one notch of a skirt of the nut.
5. Device according to claim 4 , wherein the radially external edge of the ring comprises at least two radial lugs extending diametrically opposite one another.
6. Device according to claim 1 , wherein the thinned portion of the nut is a cylindrical skirt which extends axially from the nut.
7. Device according to claim 2 wherein the radially external edge of the ring comprises at least one lug extending radially towards the exterior, that can engage in at least one notch of a skirt of the nut, the thinned portion of the nut is a cylindrical skirt which extends axially from the nut, and the skirt of the nut comprises at least two notches offset angularly in relation to one another by a value (α) corresponding to an integer of pitches between two teeth or between two catches, increased by approximately one half pitch.
8. Device according to claim 7 , wherein the nut comprises at least three notches, respectively a first notch and a second notch offset angularly in relation to one another by a value corresponding to an integer of pitches between two teeth or between two catches, increased by approximately one half pitch, and a third notch offset angularly from the first notch by a value corresponding to an integer of pitches between two teeth or between two catches, increased by approximately a quarter of a pitch or by three-quarters of a pitch.
9. Device according to claim 1 , wherein the rotational coupling means with the nut and/or the rotational coupling means with the threaded rod have an assembly clearance authorizing the assembly of the ring between the nut and the threaded rod, regardless of their positions.
10. Device according to claim 6 , wherein the device comprises means of axial retention of the ring inside the skirt.
11. Device according to claim 10 , wherein the means of axial retaining comprising a split elastic ring or circlips assembled in an interior groove of the skirt of the nut.