DE2844546A1 - Forked-link conveyor chain - has bearing eyes in links contg. metal bearing shells transmitting tension loads - Google Patents

Abstract

The chain is esp. of the forked-link type for a continuous conveyor, each link having a bearing eye at each end for a coupling pin to the next one. Each eye (2) contains a metal bearing shell (5), extending half way round at the most and acting against the pin so as to transmit tension loads on the chain to it. The shell is of material compatible with that of the pin. The remainder of the bearing surface (6) in the eye has an elastic bearing shell of rubber or plastics.

Description

Link chain

The invention relates to an articulated chain, in particular fork link chains for continuous conveyors, each chain link has a bearing eye at both ends, through which a hinge pin is used to connect to the respective following chain link, in the case of forked link chains, in particular, guided in a torsion-proof manner and axially immovable is.

Such chains are known, for example, from US Pat. No. 3,908,477.

In these link chains, the bearing play between the link pin and The bearing eye should be dimensioned relatively generously so that the chain can withstand the stresses that occur during operation does not eat coarse dirt. A lubrication of the chain bearings is in use the chain on continuous conveyors is not possible, for example.

The large tolerance inevitably leads to a reduction in the Tragantelis the connection.

Furthermore, an adaptation of the material of the bearing eye to the Material of the hinge pin not possible because the choice of material depends on the Conditions of chain stress must be based and not according to requirements of the bearing eye.

For example, the chain link is made from C 45 and case-hardened, While the storage areas must also be fired to make them bearable To achieve storage properties.

In addition, the relatively large bearing clearance leads to early wear the chain.

The invention is based on the object of providing an articulated chain as described above to create the type described, which works flawlessly in the event of severe pollution and at the same time has bearings with close tolerances that clean themselves and with which the bearing eye material can be matched to the bolt material.

To solve the problem, the invention proposes that in each bearing eye, in particular of each chain link in the direction of applied tensile forces partially, but at most one on half the bearing surface that corresponds to the bolt metallic bearing shell is arranged, the material on the bolt material is matched, in particular and that / the rest of the Lsgerfläche of the bearing eye with an elastic bearing shell, for example made of rubber or

Plastic.

Any bearing eye that moves relative to the hinge pin, can by inserting the at most half of the storage area occupying metal bearing shell must be very tightly tolerated, that is, the fit between the bearing shell and the bolt can be very tight. This results in a very good power transmission, i.e. the contact ratio is improved.

As a consequence, there is little wear and tear at the connection point.

The bearing shell material, like the bolt material, can for example be corrosion-resistant steel or another suitable material. If the Operation between the joint tools and the bearing surface of the metallic bearing shell Dirt or the like sets in granular form, the bolt can move in the direction of the Dodge elastic bearing shell and the stress without breaking or seizing survive. As soon as the dirt from the metallic bearing shell as a result of bolt movement is conveyed out, the bolt is fully inserted again into the metal bearing shell, this endeavor caused by the tensile forces acting on the chain and is supported by the elastic bearing shell. Otherwise it is penetrated Dirt stripped off the front edges of the metal bearing shell. It totally can suffice to use only the metal bearing shell without the elastic Bearing shell, which is not a bearing shell in the true sense of the word, use close.

A preferred development is seen in the fact that in each bearing eye on the side facing the chain link end a semicircular, cylindrical bearing shell is arranged and in the remaining part of the bearing surface an elastically resilient bearing shell is arranged.

The parting line of the bearing shells runs transversely to the load direction. This creates the largest possible storage area (metal bearing shell), whereby the installation of the hinge pin can be done relatively easily because it -as the first stressed solution out of the metal bearing shell half in the direction on the elastic bearing shell half because of its elasticity is displaceable.

It is particularly advantageous that the ends of the metal bearing shell are sharp-edged, in particular running radially to the bearing shell.

This allows dirt that has penetrated to be wiped off particularly well.

A preferred embodiment is characterized in that the metallic Bearing shell half cohesively, for example by brazing, in the bearing eye of the chain link is attached and that the elastic bearing shell half is at least positively attached in the bearing eye of the chain link.

The best solution in terms of assembly is that the metal Bearing shell occupies a little less than 1800 of the bearing eye circumference.

An embodiment of the invention is shown in the drawing and described in more detail below.

It shows: FIG. 1 two chain links in a view, FIG. 2 a bearing eye in side view.

The invention is illustrated below using the example of a forked tab-type Conveyor chain of a continuous conveyor, for example a trough chain conveyor described.

The articulated chain consists of chain links 1 with ends arranged Bearing eyes 2. A hinge pin 3 is guided through these, which is attached to the chain links 1 connecting intermediate links 4 twisted and axially immovable held is.

In each bearing eye 2 of each chain link 1 is a metallic one Bearing shell 5 attached by means of Hsrtlötung, which like the hinge pin 3 from corrosion-resistant steel.

The bearing shells 5 are arranged so that they are at the link chain Applying tensile forces guide the hinge pin 3. The ends of the nearly 1800's The inner circumference of the bearing eyes occupying the bearing shells 5 are sharp-edged at their ends 7 formed with a radially extending edge.

The remaining inner peripheral surface of the bearing eye is of an elastic, made of rubber bearing shell 6 occupied.

All new items disclosed in the description and / or drawing and combination features are considered essential to the invention.

Claims (6)

P a t e n t a n s p r ü c h e: 1. Link chain, especially forked link chains for continuous conveyors, each chain link has a bearing eye at both ends, through which a hinge pin is used to connect to the respective following chain link, in the case of Gatellzschenketten, in particular, guided in a torsion-proof and axially immovable manner is, characterized in that in each bearing eye (2), in particular each Chain link (1) in the direction of attacking tensile forces partially, but at most half of the bearing surface, which corresponds to the bolt (3), a meallish bearing bracket (5) is arranged, the material matched to the bolt in particular material is, and that the rest of the bearing surface of the bearing eye (2) with an elastic bearing bracket (6), for example made of rubber or plastic, is provided. 2. Articulated chain according to claim 1, characterized in that in each Bearing eye (2) has a semicircular shape on the side facing the end of the chain link trained, cylindrical bearing shell (5) is arranged and in Vernleibenden part of the bearing surface is arranged an elastic, yielding bearing shell (6) is. 3. Articulated chain according to claim 1 and / or 2, characterized in that that the ends (7) of the metal bearing shell (6) edged, in particular radially to the bearing shell (5) are formed. 4. Articulated chain according to Claims 1 to 3, characterized in that that the metal half of the bearing schelan is firmly bonded, for example by brazing, is attached in the bearing eye (2) of the chain link (1). 5. Articulated chain according to Claims 1 to 4, characterized in that that the elastic bearing shell half is at least positively locked in the bearing (2) of the chain link (1) attached solder. 6. Articulated chain according to claims 1 to 5, characterized in that the metal bearing shell (5) slightly less than 180 ° of the bearing eye circumference occupies.