SU1423841A1 - Elastic expanding clutch - Google Patents

Abstract

The invention relates to mechanical engineering and is intended to transmit torque with the damping of shock and vibration loads. The goal .- increasing the load capacity and elastic properties of the coupling. The coupling consists of a driven half coupling and a leading coupling half in the form of a hub 1 with radial rods 4. Centrifugal weights in the form of sliders are mounted on the rods (P) 6. The upper coupling half is connected by extension springs with U driven half coupling. Driven coupling half is made in the form of a rim 3, covering the leading coupling half. Under the action of centrifugal forces P, they move from the center of the coupling, stretching the spring. 2 Il.

Description

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FIG. 2

The invention relates to the field of mechanical engineering and is intended to transmit torque in conditions of increased shock and vibration loads.

The aim of the invention is to increase the load capacity and elastic-dynamic properties of the coupling.

FIG. 1 shows the coupling, general view; in fig. 2 shows a section A-A in FIG.

The clutch contains a leading coupling half, made in the form of a hub 1, on the outer surface of which symmetrically circumferentially spaced through radial holes, and a driven coupling half, made in the form of a hub 2 and rim 3, in which symmetrically around the circumference there are similar holes. In the holes of both the master and the driven coupling halves, rods 4 are pressed, containing bronze bushings 5, on which centrifugal weights are mounted in the form of cylindrical sliders 6 with beveled lower ends that can be moved in the radial direction. On the lateral surface of the center | The supporting loads 6 are made by grooves i (two in each load), in which hooks 7 of coil springs 8 I of tension go, connecting adjacent loads of 6 leading and driven half couplings. I The clutch works in the following way. j Rotation between coupling half-couplings 1 through rods 4, centrifugal weights 6 of the driving half-coupling and springs I 8. The required torsional rigidity is provided by the springs 8, working in tension through one. Ost I „

; Spring springs operate when reversing rotation. As the rotational speed increases, the loads 6 together with the springs B under the action of centrifugal forces move along the sleeves 5 of the rods A towards the rim 3 of the driven half coupling, while the springs 8 receive an additional extension, which corresponds to a certain angle relative to the rotation of the half couplings. In this way, the torsional stiffness of the coupling gradually increases, which contributes to the improvement of the dynamic properties of the coupling, as it is thickened.

At certain torque and speed of rotation of the coupling, a dynamic equilibrium is established, characterized by a certain angle of relative rotation of the coupling halves,

Dius - by the vector of the center of gravity of centrifugal weights 6 and the corresponding deformation of the helical springs 8.

Static torsional stiffness of the coupling

. Cos ji

2ri

(t)

where Q is the radius of location of the centers of attachment of the springs to the weights in a non-rotating coupling (see Fig. 1); n is the number of fingers of one half coupling;

C - spring stiffness. When rotated at a constant angular velocity, the centrifugal weights are kept in a state of equilibrium by centrifugal forces and radial components of the elastic forces opposed by the springs due to their additional deformation. From the equilibrium condition one can define no. the radius of the location of the centers of attachment of the springs to the loads Q

p g9

   f 1 h 1 I

2 with S in - - m „w

h

where mj is the mass of the load;

s - angular rotation speed

couplings.

Hence the torsional stiffness of the coupling when rotating at an angular velocity and

(Q) n C

Cr

Cos

ih

(2Csin, 2) 2

(3)

has the following advantages.

Due to the fact that the elastic elements (helical springs) form a regular polyhedron around the hub of the driving half coupling, the coupling stiffness is critical even at very low twist angles large enough (the minimum torsional rigidity is defined by the expression 1), due to which the coupling easily absorbs shocks during starting and braking , and also when reversing.

As can be seen from expression (3), the design of the coupling provides a significant increase in torsional rigidity (up to 6 times and even more with U) 3000 rpm under the influence of centrifugal forces with increasing rotational speed.

31A2384

The clutch has a 2.5-3 times greater carrying capacity, since as the rotational speed increases, both ends of the coil springs are equally spaced from the axis of rotation, as a result of which the load acting on each spring is reduced accordingly.

Claims (1)

Invention Formula Elastic-centrifugal coupling, containing the leading field of the coupling in the form of a hub with radial rods and centrifugal loads mounted on them. Editor O.Spesyvykh Compiled by Yu.Runov Tehred L. Serdyukova Proofreader V. But ha Order 4626/42 Circulation 784 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, PaiTDCKSM nab. d. 4/5 0 five 14 in the form of sliders associated with the driven floor by a clutch of tension springs, characterized in that, in order to improve the load capacity and elastic-dynamic properties, the eye is provided with additional rods with sliders, with the knowledge of the coupling half made in the form of a rim covering the leading coupling half, the rods are installed radially in the de driven coupling half evenly around the circumference between the rods of the driving coupling half, and the adjacent slide blocks and the driven coupling half are interconnected by springs. Subscription