SU436183A1 - FASTENING DEVICE - Google Patents

Description

one

The invention relates to the field of engineering.

A fastening device for attaching packages of variable thickness is known, which contains a hermetic anchor nut made in the form of a blind sleeve with a flange with internal thread and longitudinal grooves on a threaded surface into which an extension hollow bolt with slots on the end face and a pusher located inside said bolt and interacting with a locking sleeve installed inside the nut, spring is pressed to the end of the bolt and having an end lintel entering the slot of the bolt.

However, the known fastening device does not ensure the reliability of the connection and does not allow the fixing of packages of variable thickness with the required tightening density of the connected parts.

Improving the reliability of the connection and providing a tighter tightening of the parts to be connected is ensured by the fact that the device is equipped with a spring ring installed in an annular groove on its threaded surface, the retaining sleeve being made with the third lateral protrusion, and the nut with the third interacting with him a groove.

FIG. 1 shows the described device; in fig. 2 is a section along A-A in FIG. one.

The fastening device consists of a blind anchor nut 1, hermetically riveted to one of the parts to be connected with the help of flange 2. Inside the nut is made with thread 3, which is cut by three longitudinal grooves 4, as well as with an annular groove in which the spring ring 5 is installed.

The extension bolt 6 is made with splines 7 at the end and an axial bore 8, into which a pusher 9 is installed. A spring 10 and a retaining sleeve 11 are mounted between the end of the bolt and the bottom of the nut. The retaining sleeve has an end bridge 12 and three lateral projections 13.

The operation of the fastening device is carried out as follows.

The removable part is mounted on the casing of the unit with the combination of the fastening holes, the fastening bolt 6 is inserted into the hole and screwed into the nut 1.

A screwdriver blade inserted into the slot of the bolt head 6 presses the pusher 9, moving it along the axis of the bolt. When moving the pusher 9 raises the locking sleeve And over the end of the bolt. The spring 10 is then compressed. When the required pack tension is achieved, the screwdriver is removed, and

the sleeve 11 under the action of the spring 10 by the lintel 12 rests on the end face of the bolt 6. In the case of the combination of the jumper, the entrance to the front of the bolt and counter-fit it. In the event of a mismatch (the pusher moves upward), the bolt donorapadat for the hex head before the jumper enters the slots at the end of the bolt.

To remove the bolt, the blade of the screwdriver is inserted into the grommet of the bolt 6, while the pusher of the pr, izdotsim: jumper 12 comes out of the engagement, and the bolt is easily unscrewed from the hermetic nut.

The Invention

Fastening device according to aut. St. No. 204843, characterized in that, for the purpose: to increase the reliability of the joint and to completely tighten the bushing of the joint, it is equipped with a spring ring, mounted in the annular groove, which is on the threaded surface of the nut, the locking sleeve is made with the third heavy lip, and the nut with the third groove interacting with it.

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FIG. one