SU739274A1 - Flexible clutch - Google Patents

Description

(54) ELASTIC CLUTCH

I

The invention relates to mechanical engineering.

A known elastic coupling with an asterisk consists of two identical coupling halves with cams, which enter the corresponding hollows of the elastic asterisk 1.

I, -The disadvantage of the known clutch is the relatively large torsional rigidity in the section of the nominal torque of the clutch; as the compressible height of the sprocket beam increases, the stiffness decreases, and the star shape factor of the sprocket and, consequently, the allowable torque on the coupling, greater radial rigidity, i.e., weaker compensating properties when pa | allelic displacement of the axles of the coupling halves; relatively low damping ability: when couplings are used to dampen resonant torsional vibrations and shock loads, they tend to have maximum damping; the presence of large axial forces when the clutch transmits torque, reaching 40% of the circumferential force transmitted by the clutch: axial forces are transmitted through the shafts

on bearings and contribute to their rapid wear.

The purpose of the invention is to improve the elastic properties of the coupling and the elimination of axial loads acting from the side of the coupling. 5 The goal is achieved by installing intermediate discs between the coupling halves, between which cams are placed elastic elements (asterisks). In this case, each intermediate disk is centered by the outer spherical surface in the inner cylindrical surface of the detachable casing, which has on the ends the inner spherical surfaces mated with the outer spherical surfaces of the coupling halves.

FIG. 1 shows the elastic coupling, a partial section; FIG. 2 - intermediate disk.

The coupling consists of two identical half-couplings 1 and 2 with cams at the ends. Intermediate metal disks 3 are placed between the coupling halves. Elastic intermediate elements (sprockets) 4 are located between the cams of the disks 3 and the coupling halves 1 and 2.

On each intermediate disc and on the coupling halves there are external spherical surfaces with radius R.

Located on both ends of the intermediate discs, the cams are offset relative to each other (Figs. 5 and 6).

The coupling halves and intermediate discs are enclosed in a casing 5 having an internal cylindrical surface with a radius R on which the intermediate discs are centered. At the ends of the casing, the inner cylindrical surface transforms into spherical surfaces of the same radius R, by means of which they are mounted on the spherical surfaces of the coupling halves. Krzhuh has a transverse connector and is fastened by means of a bolted joint when mounted.

When mounting the casing, its inner spherical surfaces come into contact with the spherical surfaces of the coupling halves and tighten them.

The transmission of torque from the half-coupling .1 to the half-coupling 2 is carried out successively through all the sprockets 4 and the disks 3, kinematically connected with the coupling half. Therefore, each sprocket carries a nominal torque and a relative twist angle between the half couplings equal to the sum of the twist angles (deformations) on each sprocket. The torsional stiffness of the coupling decreases in comparison with a single-starter coupling by as many times as intermediate sprockets this structure contains. The coupling damping also increases, while the load capacity of the coupling remains unchanged.

With a parallel displacement of the axles of the coupling halves, the housing 5 is set at an angle to them on their spherical surfaces, and

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the intermediate discs, due to their outer spherical surfaces, are self-aligning in the cylindrical housing.

As a result, the parallel displacement of the axles of the half couplings turns into a slight angular displacement of the axes of the half couplings and intermediate discs.

It is known that elastic couplings with an asterisk have a slight angular rigidity.

When the clutch is loaded with torque, axial loads arise in it, directed from the center of the clutch to the coupling halves. Due to the contact of the casing and the coupling halves (due to the preliminary axial compression) along spherical surfaces, these forces are transmitted through the coupling halves to the casing on which they are closed.

Claims (1)

Invention Formula An elastic coupling comprising two coupling halves with cams on the end surfaces and intermediate elastic elements, characterized in that, in order to improve the elastic properties and eliminate axial loads, the coupling is equipped with a housing mounted on the coupling halves, the inner surface of which is spherical at the edges, and kinematically connected with each other, elastic elements of discs with cams on the ends. Sources of information taken into account in the examination 1. V. V. Polk, and I. D. Barbash. Couplings. ed. 4, L., “Mechanical Engineering, 1973, p. 116, rice 82