SU1418531A1 - Elastic expanding clutch - Google Patents

Abstract

The invention relates to machine building, shipbuilding, and can be used to transmit torque and damping drive oscillations. The goal is to increase damping and vibration insulation, their properties, reliability and durability of the coupling. The clutch contains a leading coupling half in the form of a hub 1 with protrusions (B) 2 and a driven half coupling in the form of a hub with shanks (X) 5, to which is attached an elastic ring 6 with two B 7 located perpendicularly X 5. The centrifugal groups are made in the form segments (C) 9 pivotally connected to B 7 of the elastic ring 6. On both sides of each B 2 driving coupling half there are springs that connect them to C 9. The torque is transmitted from the driving coupling half to driven through the compression springs Go, C 9 and elastic ring 6. 2 Il.

Description

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The invention relates to mechanical engineering, shipbuilding, and can be applied for transmitting torque and damping drive vibrations.

The purpose of the invention is to increase the damping and vibration-insulating properties.

couplings, as well as its reliability and durability.

FIG. 1 shows the coupling, general view;

in fig. 2 shows section A-A in FIG. one.

The goal is achieved by the fact that in the elastic-centrifugal clutch is leading. the coupling half is made in the form of a hub with two radial spokes diametrically opposed, knowing

coupling half is designed as a hub with

two oppositely directed rigid shanks and an elastic ring attached to them, containing two strips, the spokes of the leading coupling half are connected by means of helical compression springs to reverse centrifugal attachments made in the form of massive segments and hinged in the eyes of the elastic ring of the driven coupling half.

The clutch consists of a leading coupling half, made in the form of a hub 1 with two oppositely arranged radial projections 2, containing protrusions of circular section 3 on both sides, a driven half coupling, made in the form of a hub 4 with diametrically opposite shafts 5, to which an elastic ring 6 is rigidly attached with two protrusions 7 located at a right angle to the shanks 5. The protrusions 7 can be made in the form of eyelets, in the holes x of which the fingers 8 are pressed, on which the centrifugal arms are planted loads made in the form of massive segments

9 with blind holes at the ends. Cylindrical coil springs 10 are inserted into the holes, loosely seated on the protrusions of the 3 spokes 2 of the leading half coupling and one end resting on the side surface of the protrusions 2, and the other on the bottom of the holes of the segments 9.

The clutch works as follows.

Under the action of torque, the rotation from the leading coupling half to the driven one is transmitted through helical springs.

10, segments 9 and elastic ring 6. Thus, two types of elastic elements and massive segments take part in the transmission to rutting moment and, when the coupling rotates, oscillates periodically around the axes of the fingers 8 of the driven half-coupling with a frequency dependent on COOTHOUJC; screw springs 10 and the mass of the segments 9, the frequency of rotation of the coupling, as well as the radii of location of the centers of gravity of the segments 9 and the axes of their hinged joints with the elastic ring 6. All this makes it possible to effectively suppress oscillations of the drive and, since segments 9 are give a large inertia, damping large shock loads. Under the action of torque, the coil springs 10 are deformed (only two springs are involved in the transfer of torque to four, the other two are deformed under the influence of centrifugal weights and participate in the process of damping oscillations), the segments 9 turn through a certain angle

from the initial position, deforming the elastic ring 6 accordingly. With increasing rotational speed, the segments 9 under the action of centrifugal forces as well as the elastic forces of the springs 10 move away from the axis

5 rotation to the periphery, causing additional deformation of the elastic ring 6 and changing the torsional rigidity of the coupling. At certain torque and speed of rotation, dynamic equilibrium is established, characterized by a certain

0 deformation of the coil springs 10 of compression, the distance from the axis of rotation of the centers of gravity of the segments 9 and some angle of rotation around the axes of the fingers 8, as well as the corresponding deformation of the elastic ring

5 6.

The torsional stiffness of the coupling can be represented as the sum of two components: the stiffness in a static state, due to the elastic resistance of the deformation of the elastic elements of the coupling under

0 by the action of the torque, and the dynamic component determined by the magnitude of the rotation frequency and the inertial characteristics of the centrifugal weights. Since the segments are centrifugal plates, i.e. they are hinged on the rim of the driven half coupling and are spring-loaded to the spokes of the driving coupling half, the dynamic stiffness component is always negative (assuming the static component is positive) and, thus, common

0, the torsional stiffness of the coupling decreases as the rotational speed increases.

Compared with the known, the proposed centrifugal clutch possesses improved damping and vibration isolating properties, since the centrifugal weights are made in the form of massive segments, pivotally fixed to the elastic ring on the elastic ring, and the ends abutting on the helical compression springs, due to this design, the segments in the radial 0 clutch bots make an oscillatory motion, 1 shock and vibrations of the drive; great influence of centrifugal forces on the torsional rigidity of the coupling, (and, consequently, on its dynamic properties), since the helical springs are located perpendicularly to the protrusions of the leading coupling half, and the centrifugal weights have large inertia; increased reliability in operation, as the elastic elements (screw

five

springs) are all the time located in the direction of the circumferential force that occurs when torque is transmitted; greater durability, since, due to the hinge attachment of centrifugal weights to the elastic ring, there are no stress concentrators in the coupling design.

Claims (1)

Invention Formula An elastic centrifugal clutch containing a leading half coupling in the form of a hub with diametrically opposite projections, a driven semi coupling half in the form of a hub with two oppositely directed shanks and an elastic ring associated with the shanks centrifugal weights on it, spring-loaded to the protrusion of the 1st leading coupling half by means of helical springs, characterized in that, in order to increase reliability, damping and vibration-insulating properties, on the inner surface of the elastic ring there are projections diametrically opposed to and perpendicular to to the shafts of the driven half coupling, in this case the direction of the projections of the leading coupling half is aligned with the direction of the shanks of the driven coupling coupling, the centrifugal weights are made in the form of two segments, hingedly connected x rings with protrusions and springs are disposed on both sides of each projection perpendicular thereto. five S one / // 2 9