CS250781B1 - Reinforcing nut set - Google Patents

Abstract

The subject of the solution concerns a reinforcing nut assembly for securing the position of bodies mounted on rotating components. Its essence is that it consists of a ring and a ring, provided with central threaded holes. The ring and the ring are interconnected by a union nut so that there is a gap between the cells of the ring and the ring in the assembled state, preferably filled with a flexible disc insert. Tightening the union nut against the rings creates a friction force in the central thread, which ensures a constant, pre-set position of the nut assembly. The device is usable for anchoring, for example, spindle bearings of machine tools, also in transport machines and in various types of motion mechanisms.

Description

3 4 250781

The invention is based on a reinforcing nut assembly which ensures the securing of body positions mounted on rotating components, e.g. screws, bolts, shafts, spindles, etc. For reinforcing and aligning the bodies housed on said machine tools. components are used, among other elements, to locate the nuts of various shapes.

It is known to secure the body mounted to the bearing pin by means of a pair of nuts. The primordial with its functional forehead rests the annular part of the anchored body, and the second mortar is tightened to the first such that a pre-patch is formed in the nasal threads.

A disadvantage of the system is that the interlocking of the nuts results in a displacement of the nut resting on the anchored body from the set position, which makes the positioning of the body more precise. The introduction of a bias in the threads is necessary to produce a relatively high torque between the nuts, which results in torsion-axial undesirable deformation of the thread on the pin and nuts, possibly leading to their possible damage.

Another solution is to insure the nut by inserting a pin into a system suitable for deployed extensions, or. the internal recesses, the undercut grooves, which achieve mutual axial compliance of the threads of the separate recesses. The parts are attracted to each other by axial screws. By tightening the ties, a nut and a friction pin are formed in the threaded joint to provide a pre-set position of the nut.

The disadvantage is that, when reinforced, their compliance must first be overcome, and then strengthened.

It is not difficult to judge the resistance of tightened screws in the area of compliance and singing-alone. Inadequate tightening of the screws does not provide a reliable fastening of the nut and can be released. The technology of producing a central thread in a possibly opposite pre-stressed matrix is quite problematic.

A certain variation of said system is to use two nuts in succession, between which there is an air gap, and the nuts are connected to each other by at least three axial screws.

The disadvantage of this system is the considerable difficulty of evenly tightening the axial bolts, to a certain extent even more in the previous case, since the non-uniform tightening of the bolts results in the slope of the abutment surfaces of relatively narrow nuts.

Another known solution is a nut provided circumferentially with radial threaded holes opening into a central thread. Elastic inserts are pressed into the radial holes, pressed into the profile with central threaded bolts.

A disadvantage of this solution is that when tightening the reinforcement bolts, the nut is misaligned over the elastic inserts and thus inaccuracy of the positioning of the functional nut. By using elastic inserts, the resulting static and dynamic threaded connection reduces both axial and torsion.

Due to the inefficient reduction of joint strength, it is not recommended to use different substrates, mechanically securing the nut for rotation (for example, immatica KM-substrate MB), for case of exact fit. The iPoist nut, where the increase in friction in the load is achieved by clamping the axially spaced conical surface on one part of the matrix with the inner conical surface of the second part of the nut, has the known drawbacks of the technological side (alignment of the conical surfaces with the threaded, effort to seize the conical surfaces in the case of using the same material on both parts) and on the mounting side in view of the small insurance sensitivity.

The use of special fluid-setting fluids with metal thread surfaces without air inlet and forming a film layer in the joint to prevent the bolt and nut from torsional displacement is advantageous for use in power coupling bolts.

Alternatively, a FR-PS 4 05 012, where the bolt is fired, can be used to insure at the ends of the bolts, shafts, etc. Here, the nut must have a twin sleeve, secure the position of the stiffened body and create a loosening protection. In cases where the positionally rigid body can be axially rossy in a wider range, there is a case that either the mati has a few load carriers, either a few safety threads .

Also, for the end of the bolts, the use of the FR-PS 4 03 932 stage has a hexagonal nut inserted into the bolt nut. The threaded pin of the smaller diameter is screwed into the bolt and is threaded with a hexagon nut. This construction is pretty expensive.

Stage solutions DE 30 32 166 and DE 30 32 167 respectively are equally suitable for bolt ends only. spindle. Both solutions use the principle of split bolts. In the solution according to DE 30 32 166, the mattness must be high in order to transfer in the threads the threaded bolt and still a portion of the threads remains in the locking element. It is also necessary to consider reducing the cross-section of the screw through the threaded cavity of the threaded pin of the locking element. Certain conditions apply to the DE 30 32 167 stage. Its relative advantage, at the cost of increased labor, is the elimination of the disadvantage of FR-PS 4 05 012, the possibility of regulating the height of the carrier nut.

The drawbacks of the hitherto known constructions are avoided by the reinforcing nut assembly of the invention, the essence of which is that it consists of an adjusting ring and

Claims (2)

A ring which is connected to each other by means of a circumferential thread. Furthermore, the arrangement is characterized in that a gap with a disc is provided between the setting ring and the ring. Advantages of the proposed solution of the reinforcing nut set consist in particular in the reliability of the reinforcement and keeping the accuracy of the set position of the standing ring in the direction of the axial and radial and thus also the exact position of the anchored hotel. In this type of reinforcement, the risk of oblique tension is eliminated between the adjusting ring and the ring which occurs in other methods of causing the prestressing. The reinforcement mechanism of the nut assembly is supported so as to provide a positioning of the adjusting ring to tighten the union nut, which pulls the ring together and the adjusting ring. Tightening causes a friction-generating force in the middle thread, which ensures a permanent positioning assembly on the center thread and thus a constant position of the anchored body. The ring can be advantageously converted, especially at larger threads, such as a membrane which guarantees, by its elastic deformation, a long-term constant force, causing friction in the central thread, which is particularly evident in the case. vibrations of the system and the effect of inertial forces on the reinforcing set. The accompanying drawing shows a schematic representation of a sliver nut assembly according to the invention. FIG. 1 shows a solution of the set, figure 2 shows a detailed contact of the thread of the pin with the threads of the adjusting ring and ring. Reinforcing nut assembly consisting principally of an adjusting ring 1 and a ring 2 ', connected by a union nut 3. The adjusting ring 1, with a high geometrical accuracy of the central thread and the functional surface (functionally face adhering to the teleis 5), is provided with openings on the circumference and the malfunctioning face. 6, ev. other elements that allow it to be rotated by auxiliary products. On the circumference is a ring 1 provided with a thread 9. The ring 2, provided with the same center thread as the ring 1, is attached to the ring 1 by a union nut 3. The ring 2 and the nut 3 are provided with holes 6. The position of the anchored body is strengthened 5, the adjusting ring 1 is screwed onto the bolt 4, on which the anchored body 5 is mounted, oriented to the anchored body 5 by its functional face. secures the anchored body 5. At the pin 4, the ring 2 is screwed into the air gap 7, which may be advantageously determined by the insert 8 of the flexible material. The ring 2 is connected to the ring 1 by the drag nut 3. By tightening the cap nut 3 through the openings 6 to the stop ring 1 held in position through its openings B, or the openings 10, the required biasing of the ring 1, ring 2 and pin is formed 4, which, by means of friction, provides the nut assembly against rotation. The invention is applicable in the field of machine tools, for example, for working-bed anchoring, in conveying machines, and in machines and wherever the positioning of the anchored nuts is used, and the precise and reliable positioning of the positioning nut depends. OBJECT A reinforcing nut assembly for securing the position of bodies housed on rotary members, characterized in that it consists of an adjusting ring (1) and a ring (2) connected to each other by a threaded nut (3) by a circumferential thread (9). VYNALEZU 2. A reinforcing nut assembly according to claim 1, characterized in that a spacer (7) is provided between the mounting ring (1) and the ring (2), preferably filled with a flexible coil insert (8). 1 sheet of drawings