SE452426B

SE452426B - VIBRATION DUMPING HANDLE

Info

Publication number: SE452426B
Application number: SE8503053A
Authority: SE
Inventors: Eskil Sundstrom
Original assignee: Eskil Sundstrom
Priority date: 1985-06-19
Filing date: 1985-06-19
Publication date: 1987-11-30
Also published as: SE8503053D0; JPS6254682A; EP0207034B1; SE8503053L; ATE47072T1; SE8700128D0; EP0207034A1; SE460888B; DE3666170D1; SE8700128L

Abstract

The present invention comprises a vibration-absorbing handle (3) composed of two main parts: an outer sleeve (4) and an inner sleeve (5). The shape of the inner sleeve closely follows the contours of the tool for which it is intended. The outer surface of the inner sleeve (5) is substantially cylindrical and its inner surface consists of a material having a low coefficient of friction with respect to normal tool materials. The outer sleeve (4) consists of an elastomeric material and includes a number of radial protrusions, preferably axially running ribs (10, 11) which abut the outer surface of the inner sleeve (5) when the handle is fitted on the tool.

Description

10 15 20 25 452 426 liggande inre zon och en radiellt utanför den inre zonen be- lägen yttre zon med lägre eftergivlighet i radiell riktning än den inre zonen. 10 15 20 25 452 426 lying inner zone and a radially outside the inner zone locations outer zone with lower resilience in the radial direction than the inner zone.

Ett utföringsexempel av uppfinningen beskrives härefter närmare med hjälp av bifogade ritningar, pà vilka fig. 1 i delvis snittad längdprojektion visar en mejsel- hammare med mejsel, på vilken ett handtag enligt uppfinningen är anordnat, fig. 2 visar ett längdsnitt av ett handtag enligt upp- finningen, fig. 3 visar ett tvärsnitt längs linjen III - III i fig. 2, fig. 4 i sidovy visar en innerhylsa som ingår i det i fig. 2 visade handtaget, fig. 5 visar innerhylsan i fig. 4 sedd rakt framifrån, fig. 6 visar en utföringsvariant sedd rakt framifrån av den i fig. 4 visade innerhylsan, fig. 7 visar förenklat ett längdsnitt av en ytterhylsa som ingår i det i fig. 1 visade handtaget, och fig. 8 visar ett snitt längs linjen VIII - VIII i fig. 7.An embodiment of the invention is described below in more detail by means of the accompanying drawings, on which Fig. 1 in partially sectioned longitudinal projection shows a chisel hammer with chisel, on which a handle according to the invention is arranged, Fig. 2 shows a longitudinal section of a handle according to the finding, Fig. 3 shows a cross section along the line III - III in Fig. 2, Fig. 4 in side view shows an inner sleeve included in it in Fig. 2 shows the handle, Fig. 5 shows the inner sleeve of Fig. 4 seen straight from the front, Fig. 6 shows an embodiment variant seen straight from the front of the inner sleeve shown in Fig. 4, Fig. 7 simply shows a longitudinal section of an outer sleeve included in the handle shown in Fig. 1, and Fig. 8 shows a section along the line VIII - VIII in Fig. 7.

Ett vibrationsdämpande handtag 3 i enlighet med uppfinningen är i det i fig. 1 visade utföringsexemplet anbringat på en rensmejsel 2, som är anordnad i en mejselhammare 1.A vibration damping handle 3 in accordance with the invention is in the exemplary embodiment shown in Fig. 1 applied to a cleaning chisel 2, which is arranged in a chisel hammer 1.

Handtaget 3 består av tvâ huvuddelar, dels en ytterhylsa 4 dels en innerhylsa 5. Ytterhylsan 4 är framställd av ett elastomert material med en mjukhetsgrad på omkring 20 - 45 10 15 20 25 30 452 426 'r 'II shore, medan innerhylsan 5 består av ett material med låg friktionskoefficient mot vanliga verktygsmaterial.The handle 3 consists of two main parts, partly an outer sleeve 4 and an inner sleeve 5. The outer sleeve 4 is made of a elastomeric material with a degree of softness of about 20 - 45 10 15 20 25 30 452 426 'r 'II shore, while the inner sleeve 5 consists of a material with low coefficient of friction against ordinary tool materials.

Innerhylsan 5 består i det visade utförandet, se fig. 4 till fig. 6, av två halvor 5a, 5b som appliceras på verktyget 2, varefter hylshalvorna 5a, 5b förenas med varandra med hjälp av snäppförband 6 till att bilda en verktyget 2 om- slutande hylsa. Innerhylsan 5 har en inre form som nära överensstämmer med verktygets 2 yttre form. Innerhylsans 5 innerkontur kan exempelvis vara cirkulär (fig. 5), hexa- gonal eller oktagonal (fig. 6) allt efter utseendet hos det aktuella verktyget 2. Företrädesvis har emellertid in- nerhylsorna 5 lika yttermått oavsett vilken inre form de än har. Därigenom kan samma ytterhylsa utnyttjas för innerhyl- sor med olika inre utseende. Innerhylsan 5 innefattar vidare två axiellt förlöpande spår 7.The inner sleeve 5 consists in the embodiment shown, see Fig. 4 to Fig. 6, of two halves 5a, 5b applied to the tool 2, after which the sleeve halves 5a, 5b are joined to each other by means of snap joints 6 to form a tool 2 closing sleeve. The inner sleeve 5 has an inner shape as close corresponds to the external shape of the tool 2. Inner sleeve The inner contour can be, for example, circular (Fig. 5), hexagonal gonal or octagonal (Fig. 6) depending on the appearance of the tool in question 2. Preferably, however, the lower sleeves 5 equal outer dimensions regardless of whatever internal shape they are has. As a result, the same outer sleeve can be used for the inner sleeve. sor with different inner appearance. The inner sleeve 5 further comprises two axially extending grooves 7.

Den elastomera ytterhylsan 4 innefattar en i stort sett cirkulär ansats 8, 9 vid vardera änden. Avståndet mellan dessa ansatser B, 9 motsvarar ungefär innerhylsans 5 längd.The elastomeric outer sleeve 4 comprises a substantially circular shoulder 8, 9 at each end. The distance between these shoulders B, 9 correspond approximately to the length of the inner sleeve 5.

Utmed'omkretsen jämnt fördelade bommar 10, ll sträcker sig mellan ytterhylsans 4 båda anslagspartier 8, 9. Två dia- metralt belägna bommar ll har en högre bomhöjd än de övriga bommarna 10, d v s att de har en större radiell utsträck- ning.Barriers 10, ll evenly distributed along the circumference extend between the two abutment portions 8, 9 of the outer sleeve 4. Metrically located booms ll have a higher boom height than the others the beams 10, i.e. they have a larger radial extent. ning.

Efter det att innerhylsan 5 anbringats på verktyget 2 förs ytterhylsan 4 över denna, så att innerhylsan 5 befinner sig mellan ytterhylsans 4 ansatspartier 8, 9, varigenom in- nerhylsan 5 lägesfixeras i axiell riktning relativt ytter- hylsan 4. Samtidigt ser man till att ytterhylsans bommar ll med större bomhöjd hamnar i innerhylsans axiella spår 7 så att innerhylsan 5 vridningssäkras i ytterhylsan 4. I monterat tillstànd anligger ytterhylsans 4 bommar 10, 11 mot innerhylsans 5 ytteryta, så att det mellan bommarna 10, 11 och mellan inner- och ytterhylsan bildas luftfyllda spalter 10 15 20 25 30 452 426 I - 12. Avståndet mellan ytterhylsans ansatser 8, 9 är därvid företrädesvis utformat sådant att luftspalterna 12 tätande tillsluts av dessa ansatser 8, 9.After the inner sleeve 5 has been applied to the tool 2, it is moved the outer sleeve 4 above it, so that the inner sleeve 5 is located between the shoulder portions 8, 9 of the outer sleeve 4, whereby the the lower sleeve 5 is positioned in the axial direction relative to the outer sleeve 4. At the same time, make sure that the outer sleeve blocks ll with greater boom height ends up in the axial groove of the inner sleeve 7 so that the inner sleeve 5 is secured against rotation in the outer sleeve 4. I mounted condition, the outer sleeve 4 booms 10, 11 abut the outer surface of the inner sleeve 5, so that between the booms 10, 11 and air-filled gaps are formed between the inner and outer sleeves 10 15 20 25 30 452 426 IN - 12. The distance between the projections 8, 9 of the outer sleeve is then preferably designed so that the air gaps 12 are sealing concluded by these approaches 8, 9.

Genom att ytterhylsans 4 massiva del medelst bommarna 10, ll är distanserad från innerhylsan 5 och bommarna därvid har givits en sådan tvärsnittsarea att en höggradig eftergivlig- het åstadkommes jämfört med helt massiva elastomera ytter- hylsor, uppnås en betydande dämpning av till operatören över- förda vibrationer, speciellt av högfrekventa radiella vibra- tioner. Denna effekt blir än mera påtaglig då luftspalterna 12 är tillslutna i ändarna, eftersom den inneslutna luften då kommer att verka som ytterligare dämporgan.By massaging the outer sleeve 4 by means of the booms 10, ll is spaced from the inner sleeve 5 and the booms thereby have given such a cross-sectional area that a high degree of resilience is achieved compared to completely solid elastomeric outer sleeves, a significant attenuation of to the operator is achieved. vibrations, especially of high frequency radial vibrations tioner. This effect becomes even more noticeable when the air gaps 12 are closed at the ends, because the trapped air then will act as additional damping means.

I utföringsexemplet består ytterhylsan 4 av en massiv del och från den massiva delen utgående utspràng för åstadkom- mande av cylindriska radiella zoner med olika eftergivlighet, men givetvis innefattas även andra varianter i uppfinningen.In the exemplary embodiment, the outer sleeve 4 consists of a solid part and from the solid part emerging protrusions to achieve cylindrical radial zones with different resilience, but of course other variants are also included in the invention.

Utspràngen som på ritningarna består av raka axiella bommar, kan således utgöras av skruvlinjeformiga bommar, tappar el- ler av runt omkretsen gående ringformiga vulster etc. För att åstadkomma cylindriska radiella zoner med olika efter- givlighet och därigenom bibringa handtaget önskade fjädrings- och dämpningsegenskaper kan ytterhylsan vidare vara samman- satt av olika materialskikt med olika hårdhetsgrad. Det yttre skiktet görs därvid företrädesvis hårdare än de öv- riga materialskikten.The projections which in the drawings consist of straight axial booms, can thus consist of helical barriers, smiles of annular beads walking around the perimeter etc. For to provide cylindrical radial zones with different resilience and thereby impart to the handle the desired suspension and damping properties, the outer sleeve may further be set of different material layers with different degrees of hardness. The the outer layer is then preferably made harder than the upper layers. rich material layers.

I den i fig. 1 visade utföringsformen begränsas det vib- rationsdämpande handtagets 3 rörelseväg av från rensmej- seln 2 radiellt utskjutande vàrtor 13 anordnade på ömse. sidor om handtaget. Handtaget 3 förhindras därigenom att glida av verktyget när detta inte utnyttjas. Rörelsebe- gränsningen kan naturligtvis åstadkommas även på andra sätt. Rörelsevägen kan exempelvis begränsas av mejseln 2 helt eller delvis runtomgåénde vulster. Vidare kan det vara tillräckligt att ordna speciella rörelsebegräns- 452 426 .In the embodiment shown in Fig. 1, the vibration is limited. ration-damping handle 3 of the movement of the reindeer seln 2 radially projecting warts 13 arranged on each other. sides of the handle. The handle 3 is thereby prevented from slide off the tool when not in use. Movement the limitation can of course also be achieved on others way. The path of movement can, for example, be limited by the chisel 2 completely or partially circumferential beads. Furthermore, it can be sufficient to arrange special movement restrictions 452 426 .

II w- ningsorgan i form av vàrtor eller vulster endast pà mej- selns ena sida. Vulsterna eller vårtorna framställes genom vanliga verkstadsmetoder, såsom smide.II w- devices in the form of warts or beads only on seln one side. The beads or warts are made through common workshop methods, such as forging.

Claims

10 15 20 25 452 426 P a t e n t k r a v

A device for preventing or damping the transmission of vibrations from a tool (2), for example a cleaning chisel, which can be gripped and controlled by hand, consisting of a handle (3) axially displaceable along the tool (2), which comprises an inner sleeve (5) whose inner shape within the displacement area closely corresponds to the outer shape of the tool (2) and whose inner surface consists of a material which has a relatively low coefficient of friction against common tool material, and an inner sleeve (5) enclosing outer sleeve (5). 4) of an elastomeric material, the outer sleeve (4) being intended to be gripped by the hand of the tool operator, characterized in that the outer sleeve (4) is built up of different elements to form substantially cylindrical zones with different resilience in radial direction. comprising an inner zone abutting the inner sleeve (5) and an outer zone located radially outside the inner zone with lower resilience in the radial direction than the inner zone.

Device according to claim 1, characterized in that the inner zone is formed by a plurality of radial projections abutting against the outer surface of the inner sleeve (5).

Device according to claim 2, characterized in that the projections are constituted by booms (10, 11) which extend at least in part in the axial direction of the handle (3).

4; Device according to claim 3, characterized in that the booms (10, 11) are straight and parallel to the axial direction of the handle (3).

Device according to claim 3, characterized in that the booms run helically. 10 15 452 426 -r

Device according to claims 3 - 5, characterized in that a part of the booms (II) engages in grooves (7) in the inner sleeve (5).

Device according to claims 1 - 6, characterized in that the outer sleeve (4) at each end comprises a radially inwardly directed shoulder (8, 9), which abuts sealingly against the inner sleeve (5), so that any gap between the inner sleeve (5) ) and the outer sleeve (4) is closed at the ends of the inner sleeve (5).

Device according to claims 1 - 7, characterized in that the inner sleeve (5) consists of at least two interconnected sleeve parts (5a, Sb).

Device according to Claim 8, characterized in that the sleeve parts (5a, 5b) are connected to one another via snap connections.