SE425428B

SE425428B - Spring element for chain

Info

Publication number: SE425428B
Application number: SE7812903A
Authority: SE
Inventors: K G Derman
Original assignee: Forsheda Ab
Priority date: 1978-12-15
Filing date: 1978-12-15
Publication date: 1982-09-27
Also published as: SE7812903L

Abstract

The invention relates to a device for imparting springing properties to a chain consisting of links coupled together. It is known to impart springing properties to a chain by vulcanising a part of the chain into a rubber-elastic material. It is, however, a comparatively costly and complicated operation to impart springing properties to a chain in this way, and in particular, it is not possible for a private chain user to impart said springing properties this way. The object of the invention is to provide a simple device, by means of which it will be possible for private persons to impart springing properties to an existing chain. In order to meet this object, the device according to the invention is characterised by elements 4, generally consisting of rubber-elastic material, which are insertable and fixable between the engaging surfaces of the links 2 of the chain facing each other by means of elastic deformation. <IMAGE>

Description

l5 '20 25 30 35 40 7812903-s uppifrån och d) elementet från änden. Fig. 3 visar en sektion längs linjen III-III i fig. 2 d. Fig. 4 visar en mot fig. 3 svarande sektion genom en modifierad ut- föringsform av ett i anordningen enligt uppfinningen ingående element. l5 '20 25 30 35 40 7812903-s from above and d) the element from the end. Fig. 3 shows a section along the line III-III in Fig. 2 d. Fig. 4 shows a section corresponding to Fig. 3 through a modified embodiment of an element included in the device according to the invention.

I fig. l visas en konventionell, av tre länkar 2 bestående kätting. Med kättingen är införlivad en anordning för att bibringa kättingen fjädrande egenskaper. Anord- ningen innefattar två mellan de mot varandra vända ingreppsytorna av kättingens länkar 2 införda element 4, vilka består av gummielastiskt material. Elementen 4 är av sfärisk grundform och är försedda med spår 6 och 8, vilka förlöper peri- feriellt runt de sfäriska elementen 4 i ett relativt varandra 900 förskjutet läge; Spåren 6 och 8 upptar partier av länkarna 2 för att åstadkomma att elementen 4 kvarhâlles vid kättingen i det i fig. l visade läget.Fig. 1 shows a conventional chain, consisting of three links 2. Included with the chain is a device for imparting resilient properties to the chain. The device comprises two elements 4 inserted between the engaging surfaces of the chain links 2 facing each other, which consist of rubber-elastic material. The elements 4 are of spherical basic shape and are provided with grooves 6 and 8, which extend circumferentially around the spherical elements 4 in a relatively offset position 900 relative to each other; The grooves 6 and 8 occupy portions of the links 2 to cause the elements 4 to be retained at the chain in the position shown in Fig. 1.

En kätting kan med önskat antal element 4 göras fjädrande i önskad grad genom att elementen 4 införes mellan kättinglänkarnas mot varandra vända ytor. För att under lätta inpressningen av elementen mellan kättinglänkarna kan sâpvatten användas. A Då kättingen utsättes för en dragkraft, kommer elementens 4 centrala parti l0 att elastiskt sammanpressas, varigenom kättingen sålunda blir fjädrande. För att hindra att partiet l0 krossas mellan kättinglänkarna vid mycket stor belastning på kättingen, kan elementen 4 förses med i en genomgående öppning l2 i partiet l0í anordnade metallorgan l4, som vid en förutbestämd sammanpressning av elementen 4 ; kommer till ingrepp med kättinglänkarnas mot varandra vända ytor för att hindra ytterligare sammanpressning av gummielementen 4.A chain with the desired number of elements 4 can be made resilient to the desired degree by the elements 4 being inserted between the surfaces of the chain links facing each other. To facilitate the pressing of the elements between the chain links, soapy water can be used. When the chain is subjected to a tensile force, the central portion 10 of the elements 4 will be elastically compressed, whereby the chain thus becomes resilient. In order to prevent the portion 10 from being crushed between the chain links under very heavy load on the chain, the elements 4 can be provided with a metal means 14 arranged in a through opening 12 in the portion 10, as in a predetermined compression of the elements 4; engages the facing surfaces of the chain links to prevent further compression of the rubber elements 4.

För att förstärka gummielementen 4 är det även möjligt att förse de partier av g spåren, som ingriper med kättinglänkarna med en beklädnad av hårt material, t ex i metallplåt eller plast.In order to reinforce the rubber elements 4, it is also possible to provide the portions of the g grooves which engage the chain links with a cladding of hard material, for example in sheet metal or plastic.

Den kan vid vissa tillämpningar av uppfinningen vara lämpligt att utforma gummi-- elementen 4 större än kättingen i en riktning tvärs dennas längdriktning. Det blü därigenom möjligt att hindra direkt ingrepp mellan en känslig yta och kätting- länkarna 2.In certain applications of the invention it may be suitable to design the rubber elements 4 larger than the chain in a direction transverse to its longitudinal direction. This makes it possible to prevent direct engagement between a sensitive surface and the chain links 2.

Förutom det primära ändamålet att bibringa en kätting eller kedja fjädrande egen- skaper medför anordningen enligt uppfinningen den fördelen, att en med anordninge enligt uppfinningen försedd kätting eller kedja är mindre utsatt för förslitning genom korrosion än en kätting eller kedja utan anordningen enligt uppfinningen. A Detta beror på, att det skyddande oxidskikt, som bildas på konventionellaIn addition to the primary object of imparting resilient properties to a chain or chain, the device according to the invention has the advantage that a chain or chain provided with devices according to the invention is less exposed to wear due to corrosion than a chain or chain without the device according to the invention. A This is because the protective oxide layer formed on conventional

Claims

Chain links of iron or steel are not worn away at a chain provided with a device according to the invention, since there is no direct engagement between the chain links. In the case of a chain without any device according to the invention, a continuous oxide formation and rubbing of the oxide layer takes place in the engaging surfaces between the chain links, so that the chain links in such a chain wear relatively quickly in the area of engagement with each other in such an environment. in water and other outdoor use. The invention can be modified within the scope of the following claims, and it is thus possible to design the elements included in the device according to the invention in any desired manner with respect to the external shape. CLAIMS 1. Device for imparting a chain or chain resilient properties consisting of interconnected links by means of rubber-elastic material present between the facing engagement surfaces of the links of the chain or chain, characterized by individual, mainly formed of rubber-elastic material facing engaging surfaces of the links (2) of the chain or chain under elastic deformation insertable and fixable elements (4).

Device according to claim 1, characterized in that the elements (4) are formed with grooves (6, 8) for receiving portions of the links (2).

Device according to claim 1 or 2, characterized in that the elements (4) have a spherical basic shape.

Device according to one of the preceding claims, characterized in that the elements (4) at the abutment surfaces against the links (2) are provided with a coating e of reinforcing material, for example sheet metal or plastic.

Device according to one of the preceding claims, characterized in that the elements (4) in the direction transverse to the longitudinal axis of the chain or chain are larger than the chain or chain.

Device according to any one of the preceding claims, characterized in that the elements (4) comprise means (4) consisting of rigid material for limiting the compression of the elements between the facing engagement surfaces of the links (2) of the chain or chain. .