DE3520573A1 - ELASTIC SHAFT COUPLING - Google Patents

Description

The invention relates to an elastic shaft coupling according to the preamble of claim 1, ie to the field of mechanics and in particular the transport by motor vehicle as well as agricultural and industrial facilities.

Flexible couplings, which are generally used in power transmission shafts, consist of two coupling halves, which are connected to one another by a rubber damper element

* ® ■ are bound, which consists of a hexagonal elastic ring, whereby clamping sleeves are provided in every hexagonal angle, which are cast or vulcanized into the rubber ring (SU-PS No. 264 280, published on October 11, 1970 in class F 16 D 3/74); these sleeves have cam-shaped or spherical projections on their contact surfaces and a trapezoidal rib which forms part of the sleeve and engages in a slot in the metallic coupling half, obviously to make the coupling more secure.

These couplings often break due to the fact that j that the elastic (rubber) materials from which they are made, the various loads of Power transmission shaft and other systems of power transmission in vehicles do not have sufficient resistance can oppose. In addition, they cannot cope with the twisting of the power transmission shaft by the motor, which increases depending on the speed.

When the elastic materials of these couplings wear out and later break irreparably, they in turn cause breakage of the central support of the bearing the power transmission shaft, the universal joint and the gearbox bearing. The break is caused by the slope Constructors and manufacturers caused clutches with

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* vulcanize ribbed sleeves that are in operation all the time act physically on these clutches and create a concentration of stresses leading to their Cause destruction. It is also known that this

° Rubber couplings are destroyed in contact with oil, the comes from the engine, transmission or differential when the vehicle is moved or when it is in workshops is serviced; they are also sensitive to contact with gas oil and other lubricants, since these oily substances contribute to the destruction of the clutches.

In addition to the disadvantages mentioned above, the rubber coupling does not withstand the heat generated by the The transmission and the power transmission shaft radiate when the vehicle has been moved for a long period of time, with the Heat tends to relax and decompose the rubber, possibly causing it to break. None of the ingredients or parts from which it is made can be replaced once it is broken. Consequently the rest of the parts of the vehicle's power transmission system will break and kick significant noises and vibrations in the power transmission shaft, in the universal joints and bearings.

The object of the invention is the construction of such Simplify couplings and increase their fatigue strength.

The invention solves this problem by the features mentioned in the characterizing part of patent claims 1. The subclaims contain useful developments of the invention.

The invention thus consists in a flexible coupling with a number of flexible plates, which one Unity or form a body that is the alternative

Movement between panels is allowed with fasteners or fasteners, e.g. B. flanged sleeves, which are inserted into the holes in the flexible panels with a light fit, as well Support washers that are fitted with a sliding fit on the other end of the sleeve. Because this support disc freely over the sleeve can slide, it defines the group of flexible plates and acts as a support flange for them. Consequently allows this combination of support disks and flanged sleeves with the bearing surfaces and the unit of the flexible plates allow some relative movement between all of these elements when they are with the coupling halves are firmly connected.

The invention is explained in more detail below with reference to the schematic drawing of exemplary embodiments. It demonstrate:

Fig. 1 shows a flexible shaft coupling, Fig. 2 shows a cross section of the coupling, Fig. 3 shows a section along line III-III in Fig. 4, and Fig. 4 is a front view of the coupling.

The coupling consists of two coupling halves 3 and 7 in the form of sleeves with three arms (3a, 3b, 3c) connected by screws 2 to the elastic element 1 are connected. This elastic element is designed in the form of a rosette-shaped body in a Number of elements, e.g. B. from 2 to 18 flexible plates 1, flanged clamping sleeves 4 and slidable with a sliding fit Washers 5 are made, which is a unit or body of appropriate shape and Form dimension.

The flanges 4a and bearing surfaces of the sleeves 4 grasp the group of flexible panels 1 and ensure the

Uniformity of the group as well as the interchangeability of the coupling parts. This group is attached to the coupling halves 3 and 7 by screw bolts 2 and nuts 6 attached.

The sleeves 4 provided with flanges and / or bearing surfaces are included in the group of rosette-shaped flexible ones Plates 1 used and ensure greater resistance to contractions and allow in turn, vibrations between the coupled parts, while breaks in other parts of the power transmission system of the vehicle as well as vibrations and loads due to the sliding fit and the lower Pre-tensioning (see Fig. 3 D 1 and D 2) of the elements 1 in Fig. 1 prevented relative movement between the interconnected materials and the elimination of stress concentrations guarantee.

This new clutch has already been used in more than 25 cars

, Brands Lada, Alfa-Romeo, Fiat, Skoda, Simca and Mercedes

Benz tested. It can also be excellent on other agricultural and industrial vehicles as well Equipment using similar couplings is used. The elastic material from which it is manufactured is not as easily destructible by the couplings currently in use Contractions or by the operating conditions to which the coupling is subjected.

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The flexible coupling withstands high temperatures and is not affected by lubricants, gas oil or other oily substances that are currently in use • Damage existing couplings.

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Another advantage of the new clutch is that it is light

Dismantling and the fact that all of its parts can be replaced, d. that is, any damaged part can be replaced by a new one.

Because of these advantages, this coupling is much more durable than those currently in use Couplings.

Another advantage of this new coupling is its simple construction, easy assembly, long-term stability, their low manufacturing costs and the savings achieved through their strength as well to see their low wear and tear and the reduced risk of breakage of other parts of the power transmission of the vehicle, ^ such as B. the universal joints and the bearings of the power transmission. It also eliminates noise and Vibrations in the vehicle.

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Claims (4)

PATENT ADVOCATE? E 26-1 Empresa Central de Abastecimientos de Ventas de Transporte Ligero y sus piezas (AUTOIMPORT) Galiano Street No. 213 Havana Cuba Flexible shaft coupling Claims 1. Elastic shaft coupling, the coupling halves through a flexible element are connected to one another, characterized in that the flexible element consists of a number of flexible plates (1) which extend axially between the coupling halves (3, 7) and alternately with these in the circumferential direction Fastening organs are connected under axial prestress. 2. Elastic shaft coupling according to claim 1, characterized in that the fastening elements consist of sleeves (4), one end of which has an annular flange (4a), which with its outer end face on each a coupling half (3 or 7) and rests with its inner end face on a flexible plate (1). SIEr) EHTSTIi. ■ * · 8O00 MUNICH 86 · POB 860340 · CABLE; HIIEINPATBNT · TEL. (089) 471071) TEhEX OUU (I -J- 3. Elastic shaft coupling according to one of claims 1 or 2, characterized in that on the Annular flange (4a) facing away from the end of the sleeves (4) a support disc (5) with a sliding fit between a flexible Plate (1) and a clamping nut (6) is arranged on a screw-threaded end of a Screw bolt (2) is screwed on, which has a coupling half (3 or 7) and the sleeve (4) interspersed.
10 4. Elastic shaft coupling according to one of claims 1 to 3, characterized in that the coupling halves (3; 7) are each provided with three fastening arms (3a, 3b, 3c), which extend in the circumferential direction of the coupling axis ¹ ^ se are alternately connected to the flexible plates (1) by the screw bolts (2).