SU1484993A1 - Flexible coupling - Google Patents

Description

The invention relates to mechanical engineering and is intended to reduce the dynamic loads that occur in the connecting elements of the drives and shafts of machines and mechanisms. The purpose of the invention is to improve the reliability and improve performance properties. The coupling contains two coupling halves 1 and 2 with grooves 3 in their flanges. An elastic intermediate disk 5 with end lugs 6 is placed between the coupling halves, in holes 7 of which fingers 8 with washers are placed 9. When tightening the nuts 1 1, the washers 9 are deformed first, and then the pressure from them is transferred to the male ends of the projections 6, which tend to take the form of a groove in the coupling halves on the one hand and washers on the other, fixing the coupling halves 1 and 2 relative to the intermediate elastic disk 5. When the rotation is transmitted from the coupling half 1 through the disk 5 to the coupling half 2, some projections 6 and a part of the disk 5 are loaded, then the loading is removed ruzki others, forming one cycle of loading in one turn of the coupling. In the elastic disk there is a dispersion of loads, which provides high compensating and damping properties. 2 h. the item of f-ly, 4 ill.

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The invention relates to mechanical engineering and can be used for the elastic connection of the power shafts of machines and mechanisms, as well as reducing the dynamic loads that occur in the drive with compensation for inaccuracies in the manufacture and assembly.

The purpose of the invention is to improve the reliability of the coupling and improve its performance properties by increasing the compensating and damping capabilities, as well as the elimination of axial displacement of the coupling halves during operation.

FIG. ! elements of the elastic coupling are shown in a disassembled state; in fig. 2 - the same, in the collection; in fig. 3 - elastic washer with radial slits; in fig. 4 - installation of an elastic washer on the coupling halves.

The elastic coupling contains two coupling halves 1 and 2 with through slots 3, made on both coupling halves peripherally in the axial direction with the formation of cams 4. The cross-section of each groove increases to the outer ends of the coupling halves. Between the coupling halves 1 and 2 is placed an intermediate disk 4, made of elastic material, such as rubber. At the ends of the intermediate disk 5, projections 6 arranged against each other are made in order to ensure their relatively simple installation in the grooves 3 of both coupling halves, trapezoidal and of constant cross-section along the length. In the protrusions 5 of the disk 4 are made through holes 7, in which fingers 8 are placed, carrying washers 9 at their ends. The latter can also be additionally made elastic either by radial slots or by their special configuration with a profile belt and location, for example, stop washers bent edge 10 on the flange of the coupling half. When tightening the fastening nuts 11 fingers 8, elastic washers 9 are first deformed, and further the pressure from the latter is transferred to the corresponding ends of the projections 5, which tend to take the form of a groove on one side and washers on the other, fixing the coupling half 1 and 2 relative to the intermediate disk five,

When the washers are elastic, the stresses on the fingers are reduced, which has a positive effect on their work when the clutch transmits large torques.

Due to the fact that the washers are provided with stops for their interaction with the outer ends of the coupling halves, a significant increase in the load-carrying capacity of the coupling is ensured, since with the relative rotation of the coupling halves from the high torque acting on them, the fingers also rotate and, acting through the elastic washers on the external ends of the coupling halves, compress the latter in the axial direction, while deforming the elastic intermediate disk placed between them.

The clutch works as follows.

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When the coupling half rotates, it cams 4 carries the intermediate disk 5 into motion, exerting pressure on the cams of the coupling half 2 through it and causing it to rotate.

With the increase in the transmitted torque of the coupling half 1 due to the deformation of the protrusions of the intermediate disk 5 rotates relative to the coupling half 2. This rotation causes the fingers 8 to rotate, which, acting through the washers 9 on the ends of the coupling half 1 and 2, press them together, squeezing the intermediate disk 5. At the same time, the protrusions 6 are also further compressed in the axial direction.

The clutch exhibits its elastic properties within the limits of the deformation of the compressible part of the disk 5 and the protrusions 6 in the slots 3. In this case, the elastic intermediate disk 5 and its protrusions 6 work only in compression. Pre-compression during the transmission of torque eliminates friction between the surfaces of the intermediate disk and the surface of the cams of the coupling halves and increases the durability of the coupling.

With the radial displacement of the axles of the coupling halves 1 and 2 (of the connected shafts) an additional rotation of the fingers 8 and the corresponding uniform compression of the disk 5 and the protrusions 6 occur.

The angular displacement of the shaft axes is compensated for by an uneven compression of the surface of the disk 5 and the volume of the projections 6 due to the tilting of the surfaces of the coupling halves.

The axial loads of the shafts are compensated by the additional load of the projections 6 and the unloading of the disk 5 or the additional loading of the disk 5 and the unloading of the projections 6. The first case is observed when the coupling halves are removed from one another, and the second is approached.

The simultaneous operation of the coupling on the elastic compensation of the moment and distortions is accompanied by a gradual (rotation angle of the coupling) loading one lugs 6 and part of the disk 5 and removing the action of the load from the others, forming one loading cycle at one turn of the coupling. If there is significant hysteresis in the elastic intermediate disk, intense energy dissipation occurs - the coupling acquires high damping properties.

Due to the fact that the grooves are made through with a cross section that increases to the outer ends of the coupling halves, and the protrusions of the intermediate disk are made on its end surfaces opposite each other and there are holes through which the fingers carrying the washers are placed at their ends as one integral unit, which does not need special devices, fixing coupling halves on shafts. This is achieved by pre-compression of the projections in the axial direction, during the deformation of which the gap between the projections of the intermediate disk is selected.

1484993

and half-coupling cams, whose cross-section increases towards the outer ends.

Performing finger washers elastic allows to reduce the dynamic loads on the fingers from the variable tensile and bending forces that occur during rotation of the couplings and the transmission of torque in the process of compensating for the geometric and kinematic errors of the mechanisms in which the coupling is used.

The application of the proposed design allows increasing its reliability and improving performance: elastic-deforming ability and compensating properties. In addition, the elastic coupling is able to perceive the axial loads acting on the shafts and coupling halves.

Claims (3)

Claim 1. The elastic coupling containing two coaxial coupling halves with axially directed cams and an intermediate elastic disk located between the coupling halves with protrusions placed in the grooves formed by the cams, characterized in that, in order to increase reliability and improve performance properties by increasing compensating and damping capabilities and exceptions axial CME ⁵ scheniya coupling halves during operation it is provided with washers and threaded finger grooves formed between the cams of the coupling halves through-spreading and axially away from elastic 10 of the disk, the protrusions on the elastic disk are axially located on its end surfaces coaxially with each other and are made with through axial holes, the washers are located on the ends of each protrusion and pressed to it by means of a threaded element placed in the hole. 2. Coupling on π. 1, characterized in that the washers are made of elastic. 3. The clutch according to claim 2, characterized in that the edges of the washers facing the cams of the half of the clutches are bent and arranged to be in contact with the corresponding end surfaces of the cams, and the length in the axial direction of the protrusions of the elastic disk exceeds the length of the cams in the indicated direction. OL / yy 1484993 FIG 4