SU1423840A1 - Elastic expanding clutch - Google Patents

Abstract

This invention relates to mechanical engineering, and is intended to dampen shock loads and reduce vibration when transmitting rotation in drives. The goal is to increase reliability and improve anti-vibration properties of the coupling. The clutch contains the leading and driven half coupling. Elastic rim 5 times. Placed on the driven half coupling. Psathumuffs are connected by coil springs 7 and an additional chain of pairs of levers 8 pivotally mounted on the leading half coupling and centrifugal blocks 9. The pads 9 are made of composite material. The centrifugal pads 9 are pivotally connected to the driven coupling half at the place of its attachment with the elastic rim 5 and the springs 7. When the coupling operates in nominal mode, the coil springs 7 remain constant between the coupled coupling halves, the pairs of levers 8 are located radially, the pads 9 are pressed to rim 5 and transmit a part of the moment, not allowing for end-dimensional deformation of it and absorbing vibrations. 2 Il. § (L s

Description

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 The invention relates to mechanical engineering and can be used in drives both for transmitting rotation, 1 ha and for damping shock loads and damping vibrations.

The aim of the invention is to increase the reliability and improve the anti-vibration properties of the coupling.

FIG. 1 shows a general view of the mufga; in fig. 2 is the same, section A-A in FIG. one.

The elasto-centrifugal coupling consists of a master and a driven coupling half and a connecting device. The drive half coupling is configured as a hub 1 with three radially circumferentially spaced protrusions 2 having openings and radial slots at the ends. The driven coupling half is made in the form of a hub 3 with three radially circumferentially arranged tailings 4 with openings and an elastic rim 5 containing three lugs 6, the openings of which are made coaxially with the openings of the shanks 4. The connecting device consists of cylindrical tension springs 7 connecting the protrusions 2 of the leading coupling half and the elastic rim 5 of the driven coupling half, a pair of levers 8 made in the form of steel plates with holes at the ends, and centrifugal weights in the form of segmental pads 9 made from composite materials. The most expedient is the manufacture of pads 9 from ordinary glass fibers or carbon fibers (for example, polyacrylonite or risk), since the production of these materials is industrialized and they have high strength. At one end of the centrifugal pads 9 there are slots and holes, coaxial holes of the shanks 4 and lugs 6 of the elastic rim 5 of the driven half-coupling, and protrusions 10 at the other end of the projections 10 and the holes 11 are inserted into them with a gap. Exactly the same fingers 11 are also located in the openings of the projections 2 of the leading half-UT. The fingers 1 1 are equipped with 1-1 ends at the openings of the pairs of levers 8, thus connecting the projections 2 of the leading coupling half with the projections of 10 centrifugal shoes 9. At the opposite end of the shoes 9, the fingers 12, are also inserted with a clearance. having the opportunity to go

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banging on bronze plugs 13, pressed into the coaxial holes of the shanks 4 and tapped on the 6th driven coupling half. On the fingers 11, which are located in the holes of the projections 2 of the leading half-coupling, and on the fingers 12, located in the lugs 6 of the elastic rim 5, the hooks of the screw pins 7, which enter the radial slots, the projections 2 and the centrifugal shoes 9, are attached.

The clutch works as follows.

In the static position, due to the preloading of the coil springs 7, the pairs of levers 8 are deflected at a small angle to the axes of the projections 2 of the leading coupling half, and the centrifugal shoes 9 fit snugly against the inner surface of the rim 5, the known coupling half. When a torque is applied (clockwise), the coil springs 7 are pulled out, the elastic rim 5 is deformed, the pairs of levers 8 change the radial position and deviate to the opposite direction from the axes of the projections 2 by a certain angle o / depending on twisting the coupling halfs if, and the safety pads 9 retract from the inner surface of the rim 5. Thus, in a transient mode (as long as the rotational speed is much lower than the nominal one), the torque is transmitted practically, only by means of the tension springs 7. With an increase in the rotational speed of the coupling, the pads 9 under the action of centrifugal forces tend to return to their original position and the angle oi between the axes of the radial protrusion 2 of the driving half coupling and the axles of the pairs of levers 8 gradually decreases. Due to the centrifugal forces of the segmental-shaped pads 9, the torsional rigidity of the coupling increases and the coil springs 7 are partially unloaded. When the rotational speed becomes significant (on the order of ZOOP rpm and more), the levers 8 occupy a radial position (i.e., the angle d becomes zero) and centrifugal pads 9 are pressed against the rim 5 of the driven half-coupling and transmit part of the torque, while not allowing excessive deformation of the elastic rim. Therefore, at high rotational speeds and nominal torque, the clutch operates in a semi-rigid mode and at the same time

provides a smooth transfer of torque load, as well as a significant reduction in noise and vibration transmitted by the master coupling half to the driven one.

When reversing (turning counterclockwise), a pair of levers 8 butts abut against the edges of the projections 10 of the pads 9, the pads 9 remain with the driven half coupling pressed to the elastic rim 5, the coupling works in semi-rigid mode again, but its vibration-insulating and damping properties somewhat lower.

This invention, in view of the location of elastic elements (helical springs) at a constant angle to the protrusion and shanks of the driving and driven creep / sleeves, as well as the manufacture of centrifugal pads made of composite materials and hinged connections of all connecting elements, has a number of technical advantages — high reliability, good absorption of noise and vibration of the drive.

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Claims (1)

Invention Formula An elastic centrifugal clutch, comprising hubs made in the form of hubs, a semi-coupling with radial protrusions and a driven semi-coupling with radially arranged shanks connected by an elastic rim, as well as centrifugal weights placed with the possibility of interaction with the inner surface of the elastic rim, and helical springs fixed by one the end on the ledges of the leading half-coupling, and the other on centrifugal weights, differs from the fact that, in order to increase reliability and improve anti-vibration properties, it is equipped with pairs of levers The centrifugal weights are made in the form of segment-shaped blocks made of composite materials, with the levers hinged at one end on the ledges of the coupling half at the place of spring attachment, and at the other end on the side opposite to the place of spring attachment. / J / 73 7 / X cV V V 77 g 7f