DK173099B1 - Screw and nut with built-in torque limiting clutch - Google Patents

Screw and nut with built-in torque limiting clutch Download PDF

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Publication number
DK173099B1
DK173099B1 DK56494A DK56494A DK173099B1 DK 173099 B1 DK173099 B1 DK 173099B1 DK 56494 A DK56494 A DK 56494A DK 56494 A DK56494 A DK 56494A DK 173099 B1 DK173099 B1 DK 173099B1
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DK
Denmark
Prior art keywords
screw
teeth
coupling
head
shaft
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DK56494A
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Danish (da)
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DK56494A (en
Inventor
Flemming Hoejberg Olsen
Kristian Bluff
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Lego As
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Application filed by Lego As filed Critical Lego As
Priority to DK56494A priority Critical patent/DK173099B1/en
Priority to AU25221/95A priority patent/AU2522195A/en
Priority to PCT/DK1995/000198 priority patent/WO1995031646A1/en
Priority to DE29521329U priority patent/DE29521329U1/en
Publication of DK56494A publication Critical patent/DK56494A/en
Priority to JP1997000024U priority patent/JP3046122U/en
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Publication of DK173099B1 publication Critical patent/DK173099B1/en

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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63HTOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H33/00Other toys
    • A63H33/04Building blocks, strips, or similar building parts
    • A63H33/10Building blocks, strips, or similar building parts to be assembled by means of additional non-adhesive elements
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63HTOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H33/00Other toys
    • A63H33/04Building blocks, strips, or similar building parts
    • A63H33/042Mechanical, electrical, optical, pneumatic or hydraulic arrangements; Motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Toys (AREA)

Description

i DK 173099 B1in DK 173099 B1

Skrue og møtrik med indbygget momentbegrænsende koblingScrew and nut with built-in torque limiting clutch

Opfindelsen angår en skrue roed et hoved og et skaft med et gevindafsnit, ved hjælp af hvilket skruen kan skrues i 5 et forud tilvirket hul roed et modsvarende gevindafsnit, samt en møtrik med et legeme, hvori der findes et hul med et gevindafsnit, hvormed møtrikken kan skrues på et skaft med et modsvarende gevindafsnit. Såvel skrue som møtrik har indbyggede momentbegrænsende koblinger.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a screw, a head and a shaft with a threaded section, by means of which the screw can be screwed into a pre-made hole, a corresponding threaded section, and a nut with a body in which is provided a hole with a threaded portion, can be screwed onto a shaft with a corresponding thread section. Both screw and nut have built-in torque limiting couplings.

10 I forbindelse med skruer og møtrikker af plast til konstruktionsbyggesæt eksisterer der et problem, idet gevindet kan ødelægges ved for kraftig tilspænding. Denne ødelæggelse kan enten finde sted på skruen, på møtrikken, 15 eller på et forud tilvirket gevindskåret skaft eller hul.10 In the case of plastic screws and nuts for structural building kits, there is a problem as the thread can be damaged by excessive tightening. This destruction can take place either on the screw, on the nut, or on a pre-made threaded shaft or hole.

For at hindre sådanne belastninger af gevindafsnittene på byggeelementer indgående et legetøjsbyggesæt, har ansøgeren i efteråret 1992 lanceret et nyt legetøjsbyggesæt, 20 hvor en momentbegrænsende skraldeanordning er inkorporeret i et værktøj med form som en skruetrækker. Legetøjsbyggesættet er markedsført under varemærket TOOLO® og er blandt andet beskrevet i de internationale patentansøgninger nr. PCT/DK92/0319 og nr. PCT/DK92/0321.In order to prevent such stresses on the thread sections on building elements including a toy building kit, in the fall of 1992, the applicant launched a new toy building kit, 20 in which a torque limiting device is incorporated in a tool such as a screwdriver. The toy building kit is marketed under the trademark TOOLO® and is described, inter alia, in international patent applications PCT / DK92 / 0319 and PCT / DK92 / 0321.

2525

Skruerne og skruetrækkeren samvirker ved, at spidsen af skruetrækkerens skaft har et trekantet tværsnit, og at skruens hoved er udformet med et hul med modsvarende tværsnit. Skruetrækkeren er udformet med en momentbegræn-30 set kobling mellem skaft og håndtag, hvor denne kobling begrænser størrelsen af det moment, skruetrækkeren kan påføre skruen.The screws and the screwdriver cooperate in that the tip of the screwdriver's shaft has a triangular cross-section and that the screw head is formed with a hole of corresponding cross-section. The screwdriver is designed with a torque-limited coupling between the shaft and handle, whereby this coupling limits the amount of torque the screwdriver can apply to the screw.

Der er imidlertid et problem i forbindelse med legetøjs-35 byggesæt, hvor elementerne, som typisk er af plast, kun 2 DK 173099 B1 tåler forholdsvis små momenter, hvorfor man er nødt til at formgive grænsefladen mellem værktøj og skrue specielt for at undgå, at andre ikke autoriserede værktøjer uden indbyggede momentbegrænsende koblinger anvendes med øde-5 læggelse af byggeelementet til følge.However, there is a problem with toy building kits, where the elements, which are typically plastic, only withstand relatively small moments, which is why you have to design the interface between the tool and the screw especially to avoid other unauthorized tools without built-in torque limiting couplings are used as a result of destruction of the building element.

Momentbegrænsende koblinger er velkendte og blandt andet beskrevet i britiske offentliggørelsesskrifter nr. GB-A-2 022 199 og nr. GB-A-2 141 999, fransk patent nr. FR-B-10 1 376 669, tyske patenter nr. DE-C-2 114 793, DE-C-Torque limiting couplings are well known and described, among others, in British Patent Nos. GB-A-2,022,199 and GB-A-2,141,999, French Patent No. FR-B-10,376,669, German Patent Nos. DE- C-2 114 793, DE-C-

2 163 109 og DE-C-2 915 526, britiske patenter nr. GB-B-661 543, GB-B-952 253, GB-B-1 151 544, GB-B-1 330 631 og GB-B-1 472 484, tysk offentliggørelsesskrift nr. DE-A-2 608 304, danske fremlæggelsesskrifter nr. DK-B-147 118 15 og DKB-155 509, samt amerikanske patenter nr. US2 163 109 and DE-C-2 915 526, British Patent Nos. GB-B-661 543, GB-B-952 253, GB-B-1 151 544, GB-B-1 330 631 and GB-B 1,472,484, German Patent Publication No. DE-A-2,608,304, Danish Patent Nos. DK-B-147 118 15 and DKB-155 509, and U.S. Patents No. US

2 731 865, US 3 712 433 og US 4 131 039.2,731,865, US 3,712,443 and US 4,131,039.

Herved sikres det, at angrebsfladerne på skruehovedet til samvirkning med værktøjet kan være udformet vilkårligt.This ensures that the contact surfaces of the screw head for interaction with the tool can be designed arbitrarily.

20 Gennem anvendelse af en momentbegrænsende kobling risikerer børnene ikke gennem deres leg med konstruktionsbyggesættet med sådanne skruer at ødelægge gevinddelene, selv om der ved tilspænding anvendes rigtigt, professionelt værktøj.20 Through the use of a torque limiting coupling, the children do not risk, through their play with the construction kit, with such screws to destroy the threaded parts, even if real, professional tools are used when tightening.

2525

Skruen kan være fingerbetjent, men vil fortrinsvis være udformet med en angrebsflade, hvormed den kan betjenes med værktøjet. Denne angrebsflade kan fx være en kærv i skruens endeflade eller være en udformning af skruehove-30 det med et polygonalt tværsnit.The screw may be finger operated, but will preferably be provided with an attack surface with which it can be operated with the tool. This attack surface may be, for example, a notch in the end face of the screw or be an embodiment of the screw head 30 with a polygonal cross section.

Ved ifølge opfindelsen at anbringe tandkransen med faste tænder som den udvendige part i den momentbegrænsende kobling vil de faste tænder kunne integreres i det lege-35 me, der danner skruens hoved, henholdsvis i møtrikken. Skruehovedlegemet kan herved fremstilles med en massiv, 3 DK 173099 B1 ret tyk ydervæg uden risiko for sugninger under plastmaterialets størkning i støbeformen, idet fordybningerne mellem tandkransens tænder forhindrer dette. Skruehovedlegemet, der er en af skruens mest udsatte dele, får så-5 ledes stor styrke, samtidig med at den kan fremstilles af plast ved sprøjtestøbning i en forholdsvis simpel støbeform. I alle kendte momentbegrænsende koblinger af denne art er de fjedrende tænder beliggende på den udvendige tandkrans. Hvis en skrue af plast skulle have fjedrende 10 tænder på den udvendige tandkrans, måtte skruehovedet være dobbeltvægget, hvilket kræver en mere kompliceret produktionsproces .By placing the toothed tooth with fixed teeth according to the invention as the outside part of the torque limiting coupling, the fixed teeth can be integrated into the body forming the head of the screw and in the nut respectively. The screw head body can hereby be manufactured with a solid, rather thick outer wall without the risk of suction during the solidification of the plastic material in the mold, the recesses between the teeth of the dental crown preventing this. The screw head body, which is one of the most exposed parts of the screw, is thus given great strength, while at the same time it can be made of plastic by injection molding in a relatively simple mold. In all known torque limiting couplings of this kind, the resilient teeth are located on the outer dental rim. If a plastic screw had to have resilient 10 teeth on the outside dental crown, the screw head had to be double-walled, requiring a more complicated production process.

Skruens skaft er også et separat legeme, som med fordel 15 kan være hult, hvorved de fjedrende tænder frit vil kunne bøjes indad i skaftets kavitet.The shaft of the screw is also a separate body which can advantageously be hollow, whereby the resilient teeth will be free to bend inwardly into the cavity of the shaft.

Ved en foretrukken udførelsesform, hvor skruen anvendes til at forstærke en friktionsmæssig sammenkobling mellem 20 to elementer i et legetøjsbyggesæt, vil skruen fortrinsvis være udformet således, at en vis vandring af skaftet i forhold til skruens øvrige del tillades. Til dette formål er skrueparten med skruehovedet udformet med to skuldre i aksial retning, hvorimellem fremspring på 25 skaftparten kan bevæges.In a preferred embodiment, where the screw is used to reinforce a frictional coupling between 20 two elements of a toy building set, the screw will preferably be designed so that some movement of the shaft relative to the rest of the screw is allowed. For this purpose, the screw portion with the screw head is formed with two shoulders in the axial direction, between which projections of the shaft portion can be moved.

Når skruen er fremstillet af plast ved sprøjtestøbning, vil skaftet med fordel være udformet med en hul cylinderkrop med gevindafsnit i den ene ende og fremspring i den 30 anden ende. De fjedrende tænder vil fortrinsvis være sammenhængende med cylinderkroppen gennem tynde stilke og udgøre en del af disse fremspring. Det forskydelige skaft vil fortrinsvis være forspændt med et fjedrende element, der er beliggende indvendigt i den hule cylinderkrop.When the screw is made of plastic by injection molding, the shaft will advantageously be formed with a hollow cylinder body with threaded sections at one end and projections at the other end. The resilient teeth will preferably be connected to the cylinder body through thin stems and form part of these protrusions. The displaceable shaft will preferably be biased with a resilient member located internally of the hollow cylinder body.

4 DK 173099 B14 DK 173099 B1

Ifølge opfindelsen vil tandkransen kunne udformes asymmetrisk, så at tændernes stigning er forskellig henholdsvis med uret og mod uret. Hermed vil momentbegrænsningen ved iskruning og udskruning have forskellige størrelser, så 5 at det aldrig vil være noget problem at løsne en skrue. Skruen ifølge opfindelsen vil ved en foretrukken udførelsesform tjene som basis for et koblingshoved til sammenkobling med andre i legetøjsbyggesæt indgående elementer. Koblingshovedet kan så være fæstnet til skruen, som angi-10 vet i krav 10. Ved udformning af skruen som angivet i krav 11, vil den kunne indgå i et legetøjsbyggesæt med kasseformede elementer, fx af den art, der markedsføres under varemærkerne DUPLO® eller TOOLO®, hvorved det kasseformede element med skrue vil kunne sammenkobles med et 15 kasseformet element både med og uden skruehul.According to the invention, the dental crown can be designed asymmetrically so that the pitch of the teeth is different clockwise and counterclockwise respectively. This will limit the torque limitation for ice screwing and unscrewing, so that it will never be a problem to loosen a screw. In a preferred embodiment, the screw according to the invention will serve as the basis for a coupling head for coupling with other elements included in toy building kits. The coupling head may then be attached to the screw as claimed in claim 10. In designing the screw as claimed in claim 11, it may form part of a toy building kit with box-shaped elements, for example of the kind marketed under the trademarks DUPLO® or TOOLO®, whereby the box-shaped element with screw can be coupled to a box-shaped element both with and without screw holes.

Herudover vedrører opfindelsen en møtrik som angivet i krav 12 med krop, hvori der findes et hul med et gevindafsnit til påskruning på et forud tilvirket skaft med et 20 modsvarende gevindafsnit. Hullet er tilvirket i en bøsning, hvor kroppen og bøsningen er udformet på to adskilte parter. Mellem kroppen og bøsningen er der tilvejebragt en momentbegrænsende kobling, så at parterne vil kunne drejes indbyrdes, når momentet mellem de to parter 25 overstiger en forudbestemt størrelse. Opfindelsen, som den er defineret i dette krav, bygger på samme grundlæggende princip som den ovenfor omtale skrue. Dette princip kan overordnet udtrykkes ved, at den momentbegrænsende kobling er flyttet fra værktøjet til skruen eller møtrik-30 ken, der indgår i en konstruktion, hvor koblingen er tilpasset en fremstillingsteknik, hvormed de enkelte dele fremstilles af plast ved sprøjtestøbning.In addition, the invention relates to a nut as claimed in claim 12 with body, wherein there is a hole with a threaded section for screwing on a pre-made shaft with a corresponding threaded section. The hole is made in a bush where the body and bush are formed on two separate parts. Between the body and the bushing, a torque limiting clutch is provided so that the parties will be able to pivot when the torque between the two parties 25 exceeds a predetermined size. The invention as defined in this claim is based on the same basic principle as the above mentioned screw. This principle can be expressed, in general, by the torque limiting coupling being moved from the tool to the screw or nut included in a structure where the coupling is adapted to a manufacturing technique whereby the individual parts are made of plastic by injection molding.

Møtrikken vil fortrinsvis være udformet med en angrebs-35 flade for et værktøj, hvormed tilspændingen kan finde sted. Møtrikkens momentbegrænsende kobling omfatter en 5 DK 173099 B1 rundtgående tandkrans anbragt på den ene part og et antal radiært udragende tænder, der er fjedrende anbragt på den anden part til indgreb med nævnte tandkrans. Da bøsningen har en cylindrisk krop, vil den rundtgående tandkrans 5 fortrinsvis være anbragt udvendig på denne, mens de fjedrende tænder vil være anbragt på hovedet og vende indad til indgreb med tandkransen. Såvel tandkransens tænder som de fjedrende tænder vil fortrinsvis være udformet asymmetrisk, så at momentbegrænsningen vil forekomme ved 10 lavere momenter ved tilspænding end ved løsning.The nut will preferably be formed with an attack surface for a tool with which the tightening can take place. The torque limiting coupling of the nut comprises a circular tooth rim arranged on one portion and a plurality of radially protruding teeth resiliently arranged on the other portion for engagement with said tooth rim. Since the sleeve has a cylindrical body, the circumferential tooth rim 5 will preferably be disposed externally thereon, while the resilient teeth will be positioned upside down and face inwardly to engage the tooth rim. Both the teeth of the dental crown and the resilient teeth will preferably be designed asymmetrically, so that the torque limitation will occur at 10 lower moments at tightening than at solution.

Opfindelsen skal i det efterfølgende forklares i forbindelse med foretrukne udførelsesformer og under henvisning til tegningen.The invention will be explained in the following with reference to preferred embodiments and with reference to the drawing.

1515

Fig. 1 viser i perspektiv en skrue ifølge opfindelsen skruet ind i et i et legetøjsbyggesæt indgående byggeelement og udformet med et koblingsorgan i form af en gribe-klo til sammenkobling med andre byggeelementer.FIG. 1 shows in perspective a screw according to the invention screwed into a building element included in a toy building set and formed with a coupling means in the form of a gripping claw for coupling with other building elements.

2020

Fig. 2 viser i perspektiv en skrue ifølge opfindelsen svarende til den i fig. 1 viste, hvor gribekloen er erstattet med et dermed komplementært koblingsorgan.FIG. 2 is a perspective view of a screw according to the invention similar to that of FIG. 1, where the gripper claw is replaced with a consequent complementary coupling means.

25 Fig. 3 viser i eksploderet view den i fig. 2 viste skrue.FIG. 3 shows in exploded view the embodiment of FIG. 2.

Fig. 4 viser i længdesnit den i fig. 2 viste skrue.FIG. 4 is a longitudinal sectional view of FIG. 2.

Fig. 5 viser en alternativ udførelses form for en skrue 30 ifølge opfindelsen.FIG. 5 shows an alternative embodiment of a screw 30 according to the invention.

Fig. 6 viser en momentbegrænsende kobling til anvendelse i en skrue eller møtrik ifølge opfindelsen.FIG. 6 shows a torque limiting coupling for use in a screw or nut according to the invention.

6 DK 173099 B16 DK 173099 B1

Fig. 7 viser den i fig. 6 viste kobling, når tænderne kammer over som følge af, at det påførte moment overskrider et forudbestemt niveau.FIG. 7 shows the one shown in FIG. 6 as the teeth comb over as a result of the applied torque exceeding a predetermined level.

5 Fig. 8 viser i længdesnit en foretrukken udførelsesform for en møtrik ifølge opfindelsen.FIG. 8 is a longitudinal sectional view of a preferred embodiment of a nut according to the invention.

Fig. 9 viser den i fig. 8 viste møtrik i perspektiv.FIG. 9 shows the one shown in FIG. 8 in perspective.

10 Fig. 10 viser den i fig. 8 viste møtrik i eksploderet view.FIG. 10 shows the one shown in FIG. 8 shown in exploded view.

Fig. 11 viser en konstruktion, hvor fire af de i fig. 8 viste møtrikker er anvendt til fastgørelse af en plade 15 til en ramme.FIG. 11 shows a structure in which four of the FIG. 8 are used to attach a plate 15 to a frame.

Fig. 12 viser en momentbegrænsende kobling anvendt i et byggeelement ifølge opfindelsen.FIG. 12 shows a torque limiting coupling used in a building element according to the invention.

20 Der henvises først til fig. 4. Her ses et længdesnit af en skrue ifølge opfindelsen, og den omfatter et hoved 1 og et skaft 2 med et gevindafsnit 3. Hermed kan skruen skrues i et forud tilvirket hul med et modsvarende gevindafsnit, fx tilvirket i et sprøjtestøbt byggeelement 25 af plast indgående i et legetøjsbyggesæt. Det ses, at hovedet 1 og skaftet 2 er tilvejebragt på to adskilte parter 10, 20. Mellem hovedet 1 og skaftet 2 er der tilvejebragt en momentbegrænsende kobling 30, hvormed parterne 10, 20 tillades at dreje indbyrdes, når momentet mellem 30 de to parter overstiger en forudbestemt størrelse. Den momentbegrænsende kobling vist langs et tværsnit VI-VI vil svare til den i fig. 6-7 viste kobling.20 Referring first to FIG. 4. Here is shown a longitudinal section of a screw according to the invention, comprising a head 1 and a shaft 2 with a thread section 3. Hereby the screw can be screwed into a pre-made hole with a corresponding thread section, for example manufactured in an injection molded building element 25 of plastic. included in a toy building set. It is seen that the head 1 and the shaft 2 are provided on two separate parts 10, 20. Between the head 1 and the shaft 2, a torque limiting coupling 30 is provided, which allows the parts 10, 20 to rotate when the torque between the two parties exceeds a predetermined size. The torque limiting coupling shown along a cross section VI-VI will be similar to that of FIG. 6-7.

Skaftparten 20 er ved den foretrukne udførelsesform i sin 35 helhed fremstillet af plast ved sprøjtestøbning, og den har et cylindrisk parti 23, der via en konisk aftrapning 7 DK 173099 B1 22 går over i det med gevind 3 forsynede skaft 2. Skaftet 2 afsluttes med en endevæg. Indervæggen af aftrapningen 22 tjener som en skulder 21 for en skruefjeder 25, der strækker sig i skaftets længderetning. I den anden ende 5 af det cylindriske parti 23 er skaftparten 20 udformet med en rundtgående vulst 24, der via knaster 36, som strækker sig i aksial retning, afsluttes i fjedrende vinger 37 forsynet med tænder til indgreb med hovedparten 10's rundtgående tandkrans. Dette vil blive forklaret i 10 detaljer i forbindelse med fig. 6 og 7.The shaft portion 20, in the preferred embodiment, is made entirely of plastic by injection molding and has a cylindrical portion 23 which, via a tapered step 7, enters the threaded shaft 2. The shaft 2 terminates with an end wall. The inner wall of the step 22 serves as a shoulder 21 for a screw spring 25 extending longitudinally of the shaft. At the other end 5 of the cylindrical portion 23, the shank portion 20 is formed with a circumferential bead 24 which, via axes 36 extending in axial direction, terminates in resilient wings 37 provided with teeth for engagement with the circumferential tooth rim of the main portion 10. This will be explained in 10 details in connection with FIG. 6 and 7.

Hovedparten 10 omfatter ligeledes et cylindrisk parti 12, der udvendigt er udformet med en angrebs flade 11 for et ikke vist værktøj, og angrebsfladen 11 kan have et hexa-15 gonalt tværsnit, så at dette passer til kendte spændenøg- ler. Gennem en trinvis aftrapning 13 går det cylindriske parti 12 over i et yderligere cylindrisk parti 14 med en diameter, der passer til skaftparten 20's cylinderpart 23, så at drejning mellem parterne tillades, og der opnås 20 en god føring parterne imellem.The main portion 10 also comprises a cylindrical portion 12 externally formed with an attack surface 11 for a tool not shown, and the attack surface 11 may have a hexagonal cross-section to fit known tensioning keys. Through a stepwise step 13, the cylindrical portion 12 transitions into a further cylindrical portion 14 having a diameter corresponding to the barrel portion 23 of the shaft portion 20, so that rotation between the portions is allowed and a good guide is obtained between the portions.

Udvendigt på det cylindriske parti 14 findes der en rundtgående vulst 15 med en aksial forløbende væg og en skrå eller konisk ledevæg. Herved kan et kasseformet 25 skørt 80 med en cirkulær midteråbning føres ind over partiet 14's vulst 15 og fastholdes drejeligt mellem vulsten og den trinvise aftrapning 13. Til dette formål er aftrapningen 13 udformet med en rundtgående vulst 13a for at øge anlægsfladens størrelse mod skørtet 80. Skørtet 80 30 låses til cylinderparten ved hjælp af en irreversibel snaplåsning tilvejebragt med den asymmetriske vulst 15.Exterior of the cylindrical portion 14 is provided a circumferential bead 15 with an axially extending wall and an inclined or tapered guide wall. Hereby, a box-shaped skirt 80 with a circular center opening can be inserted over the bead 15 of the portion 14 and can be pivotally held between the bead and the stepwise step 13. For this purpose, the step 13 is formed with a circumferential bead 13a to increase the size of the abutment surface against the skirt 80. The skirt 80 30 is locked to the cylinder part by an irreversible snap lock provided with the asymmetric bead 15.

I den anden ende af cylinderpartiet 12 forefindes to vul-ster 16, 17, hvoraf den ene vulst 16 tjener som stop for 35 en koblingspart 90, der vil blive omtalt i forbindelse med fig. 1-3. Den anden vulst 17 har en ledevæg, så at 8 DK 173099 B1 koblingsparten 90 kan føres over vulsten 17's ledevæg og fastholdes i en irreversibel snapkobling mellem vulsterne 16 og 17.At the other end of the barrel portion 12 are two bumps 16, 17, one bead 16 serving as a stop for 35 a coupling portion 90 which will be discussed in connection with FIGS. 1-3. The second bead 17 has a guide wall so that the coupling portion 90 can be passed over the guide wall of the bead 17 and held in an irreversible snap coupling between the beads 16 and 17.

5 Indvendigt er det cylindriske parti 12 udformet med en rundtgående tandkrans 31, svarende til den, der vil blive omtalt i forbindelse med fig. 6 og 7. Tænderne i tandkransen 31 har en aksial udstrækning, der svarer til den aksiale vandring af skaftparten 20 i kammeret dannet af 10 den cylindriske part 12. Skaftparten 20 forspændes med fjederen 25 i den i fig. 4 viste stilling, idet fjederen 25 udøver et tryk mellem den indvendige væg 21 i aftrapningen 22 og en prop 91 på koblingsparten 90. Proppen 91 kan med fordel have en centertap 92, så at fjederen 25 15 holdes på plads. Vulsten 24 med vingerne 37 på skaftparten 20 tillader en vandring af skaftparten 20 mellem vul-stens anlæg mod skulderen med aftrapningen 13 henholdsvis proppen 91. Skaftparten 20 vil derfor kunne presses inden for hovedparten 10, hvis der i aksial retning påføres en 20 kraft, der er større end fjederens 25 fjederkraft.5 Inside, the cylindrical portion 12 is formed with a circular tooth rim 31, similar to that which will be discussed in connection with FIG. 6 and 7. The teeth of the gear ring 31 have an axial extension corresponding to the axial travel of the shaft portion 20 in the chamber formed by the cylindrical portion 12. The shaft portion 20 is pre-tensioned with the spring 25 of the embodiment shown in FIG. 4, the spring 25 exerting a pressure between the inner wall 21 of the step 22 and a plug 91 on the coupling part 90. The plug 91 may advantageously have a center pin 92 so that the spring 25 is held in place. The bead 24 with the blades 37 on the shaft portion 20 permits a migration of the shaft portion 20 between the abutment abutment against the shoulder with the tapping 13 and the stopper 91. Therefore, the shaft portion 20 can be pressed within the main portion 10 if an axial force is applied in the axial direction 10. is greater than the spring force 25 of the spring.

Fig. 3 viser samme konstruktion, men i eksploderet view.FIG. 3 shows the same construction but in exploded view.

Det ses, at skørtet 80 er kasseformet, og ved en fore-trukken udførelsesform vil det kunne sammenkobles med fi-25 re koblingstappe på et konstruktionsbyggeelement af den art, der forhandles under varemærket DUPLO®. Hvis dette byggeelement desuden har skruehuller af den art, der er markeret med henvisningstallet 66 i fig. 12, vil koblingen mellem koblingstappene 67 og skørtet 80 kunne for-30 stærkes ved iskruning af skruens skaft.It is seen that the skirt 80 is box-shaped and, in a preferred embodiment, it can be coupled with four coupling pins on a structural building element of the kind negotiated under the trademark DUPLO®. In addition, if this building element has screw holes of the kind marked by reference numeral 66 in FIG. 12, the coupling between the coupling pins 67 and the skirt 80 can be strengthened by ice screwing the shaft of the screw.

På fig. 2 og 3 ses, at koblingsparten 90 har to gaffelgrene 93 hver med respektive runde fremspring 94 på indersiden. På fig. 1 ses en anden type koblingspart 90 1, 35 der i øvrigt er fæstnet til skruen på samme måde som koblingsparten 90, men som har et næbformet parti med et næb 9 DK 173099 B1 97 med en spalte 96 og to delvis cirkelformede forsænkninger 98. Når koblingsparten 90' kobles sammen med koblingsparten 90, vil fremspringene 94 gennem en udbøjning af gaffelgrenene 93 kunne optages i forsænkningerne 98, 5 samtidig med, at spændeskruen 95 optages i næbbet 97's spalte 96. Ved at spænde skruen 95 vil man kunne fastholde sammenkoblingen af de to koblingsparter henholdsvis 90 og 90', idet en udbøjning af gaffelgrenene ikke længere vil være mulig, før skruen 95 på ny er løsnet. Skruen fra 10 fig. 1 er koblet sammen med et af legetøjsbyggesættets konstruktionselementer 100, og dette kendes fra international patentansøgning nr. PCT/DK92/00319 og er i øvrigt udformet med en koblingspart svarende til koblingsparten 90'.In FIG. 2 and 3, it is seen that the coupling member 90 has two fork branches 93 each with respective round projections 94 on the inside. In FIG. 1, another type of coupling part 90 1, 35, which is otherwise attached to the screw in the same way as the coupling part 90, but which has a beak-shaped portion with a beak 9 with a slot 96 and two partially circular recesses 98, is seen. the coupling part 90 'is coupled to the coupling part 90, the projections 94 can be received through a bending of the fork branches 93 in the recesses 98, 5 at the same time as the clamping screw 95 is received in the bore 96 of the beak 97. By tightening the screw 95 it is possible to retain the coupling two coupling parts 90 and 90 ', respectively, a bending of the fork branches will no longer be possible until the screw 95 is loosened again. The screw of FIG. 1 is coupled to one of the construction elements 100 of the toy building set, and this is known from International Patent Application No. PCT / DK92 / 00319 and is otherwise designed with a coupling part corresponding to the coupling part 90 '.

1515

Fig. 5 viser en anden udførelsesform for en skrue ifølge opfindelsen, og i modsætning til de i fig. 1-4 viste udførelses former har denne skrue et ret konventionelt udseende, idet hovedet 1 ikke tjener som basis for en af 20 legetøjsbyggesættets koblingsmekanismer. Udover hovedet 1 har skruen et skaft 2 med gevind 3. Skruen skrues i et andet byggeelements komplementære skruehul, hvorved en pladedel vil kunne fastholdes med hovedet l's skulder 66. Hovedet 1 er i øvrigt udformet med gribeflader 11 for et 25 værktøj. Alternativt kan skruen være udformet med vinger og tjene som en fingerbetjent vingeskrue. Skaftet 2 og hovedet 1 er to indbyrdes drejelige dele, der er sammenhængende gennem en momentbegrænsende kobling, svarende til den i fig. 6 og 7 viste. Hovedet 1 har herudover en 30 cylindrisk krave 64, der tjener som leje for skaftet 2, og som stabiliserer parternes indbyrdes bevægelse.FIG. 5 shows another embodiment of a screw according to the invention, and in contrast to those in FIG. 1-4, this screw has a rather conventional appearance, with the head 1 not serving as the basis for one of the 20 toy building kit coupling mechanisms. In addition to the head 1, the screw has a shaft 2 with thread 3. The screw is screwed into the complementary screw hole of another building element, whereby a plate part can be secured with the shoulder 66 of the head 1. The head 1 is otherwise designed with gripping surfaces 11 for a tool. Alternatively, the screw may be designed with wings and serve as a finger operated wing screw. The shaft 2 and the head 1 are two mutually rotatable parts connected together through a torque limiting coupling, similar to that of FIG. 6 and 7. In addition, the head 1 has a cylindrical collar 64 which serves as a bearing for the shaft 2 and which stabilizes the movement of the parties.

På fig. 6 er en foretrukken udførelsesform for en moment-begrænsende kobling 30 til anvendelse med en møtrik eller 35 en skrue ifølge opfindelsen vist i tværsnit. Koblingen 30 omfatter en yderpart 31 med en rundtgående indvendig 10 DK 173099 B1 tandkrans. Den ydre part 31 har form som en bøsning. Bøsningens længde er afhængig af, om koblingen 30's indre part 32 skal tillades at kunne udføre en forudbestemt vandring i aksial retning. Hvis vandring af parten 32 5 tillades, vil parten 31's tandkrans have en aksial længde svarende til mindst vandringen adderet med bredden af parten 32's kontaktpart i indgreb med tandkransen.In FIG. 6, a preferred embodiment of a torque limiting coupling 30 for use with a nut or a screw according to the invention is shown in cross section. The coupling 30 comprises an outer portion 31 with a circumferential internal ring. The outer portion 31 is in the form of a sleeve. The length of the bushing depends on whether the inner portion 32 of the clutch 30 is to be allowed to perform a predetermined axial travel. If walking of the portion 325 is allowed, the tooth rim of the portion 31 will have an axial length corresponding to at least the passage added with the width of the contact portion of the portion 32 engaging the dental rim.

Tandkransens tænder 33 ses at være asymmetriske, idet de-10 res stigning ved en foretrukken udførelsesform i den eneretning danner en vinkel med bøsningens radius R på mellem 0 og 10 °, fortrinsvis mellem 2 og 5 °, og i den anden retning mellem 45 og 80 °, fortrinsvis mellem 55 og 65 °.The teeth 33 of the gear ring are seen to be asymmetrical, with their rise in a preferred embodiment in that direction forming an angle with the radius R of the sleeve of between 0 and 10 °, preferably between 2 and 5 °, and in the other direction between 45 and 80 °, preferably between 55 and 65 °.

1515

Inderparten 32 omfatter en bøsningspart 34, der er lejret koaksialt med yderparten 31. Fra bøsningsparten er der ved den foretrukne udførelsesform i aksial retning udformet to udragende knaster 36. Vinger 37, der forløber i 20 partens periferiretning, er i den ene ende 35 fæstnet til nævnte knaster 36, mens deres modstående ende er fri. Udad vendende tænder 38 på vingerne 37 vil således gå i fjedrende indgreb med tænderne 33 på yderparten 31's tandkrans.The inner portion 32 comprises a bushing portion 34 which is coaxially mounted with the outer portion 31. From the bushing portion, in the preferred embodiment, two protruding bosses 36 are formed. Blades 37 extending in the circumferential direction of the portion 20 are attached at one end 35 to the said knobs 36 while their opposite end is free. Outwardly facing teeth 38 on the blades 37 will thus resiliently engage with the teeth 33 on the tooth rim of the outer portion 31.

25 Så længe momentet mellem inderparten 32 og yderparten 31 i retning A er under en given grænseværdi, vil koblingen låse de to parter til hinanden. Når momentet stiger til over denne grænseværdi presses vingerne 37 indad i den i 30 fig. 7 med pilene B markerede retning, og tænderne 38 bringes ud af indgreb med tandkransen 39's tænder 33. Så længe momentet overstiger denne grænseværdi, vil parterne 32 og 31 kunne drejes indbyrdes i den med pilen C markerede retning med vingerne 37 udfarende en skraldefunkti-35 on. Inderparten 32 og yderparten 31 vil fortrinsvis være fremstillet af plast ved sprøjtestøbning og vil derfor 11 DK 173099 B1 bestå af et plastmateriale, såsom ABS. Momentets grænseværdi for, hvornår tænderne kammer over, er bestemt af parametre som tændernes stigning, samt vingerne 37 og knasterne 35's fjedrende egenskaber, hvor sidstnævnte af-5 hænger af materialets elasticitetsmodul og formparametre.As long as the torque between the inner portion 32 and the outer portion 31 in direction A is below a given limit value, the clutch will lock the two parts together. As the torque rises above this limit value, the blades 37 are pressed inwardly in the FIG. 7 with the arrows B marked and the teeth 38 brought out of engagement with the teeth 33. of the toothed rim 39 As long as the torque exceeds this limit value, the parts 32 and 31 can be rotated mutually in the direction indicated by the arrow C with the wings 37 forming a ratchet function 35 one. The inner portion 32 and outer portion 31 will preferably be made of plastic by injection molding and will therefore consist of a plastic material such as ABS. The limit value of the moment when the teeth comb over is determined by parameters such as the pitch of the teeth, as well as the resilient properties of the blades 37 and the knobs 35, the latter being dependent on the modulus of elasticity and the shape parameters.

Det er klart, at momentbegrænsningen også kan opnås i modsat retning ved at ændre tændernes stigning. Samtidig vil koblingen kunne udformes med en udvendig tandkrans, 10 hvor de fjedrende tænder vender radiært indad.It is clear that the torque limitation can also be achieved in the opposite direction by changing the pitch of the teeth. At the same time, the coupling can be designed with an external tooth ring, 10 with the resilient teeth radially inward.

På fig. 9 ses i perspektiv en foretrukken udførelsesform for en møtrik ifølge opfindelsen. Møtrikken, der i sin helhed er betegnet med henvisningstallet 40, omfatter en 15 møtrikkrop 41, der udvendigt er udformet med en betjeningsflade 42 for samvirkning med et ikke vist værktøj, eksempelvis i form af en skruenøgle. I et tværsnit vil den viste møtrik have et hexagonalt tværsnit. For at opnå et i det væsentlige rundt tværsnit ved møtrikkens ender i 20 aksial retning, er den udformet med en rundtgående vulst 43. I begge ender af møtrikken 40 er der tilvejebragt bøsninger med et indvendigt gevind 45 til sammenskruning med en ekstern skrues skaft. Mellem respektive bøsninger 44 og møtrikkens krop 41 er der udformet en momentbegræn-25 sende kobling af den i fig. 6 og 7 viste art. Fig. 8 viser et længdesnit af den i fig. 9 viste møtrik. Det ses, at møtrikkens krop er delt op i to kamre 46 med en med kroppen integreret skillevæg 47. I kammeret 46 til venstre er der anbragt en bøsning 44, og det ses, at fjed-30 rende vinger 48 med tænder 49 får indgreb med kroppens tandkrans 50. Denne tandkrans 50 er vist i kammeret 46 til højre, idet bøsningen 44 her er udeladt af samme årsag. Bøsningerne 44 fastholdes i kamrene 46, idet parterne henholdsvis er udformet med en vulst 51 og en rille 35 52, så at der efter montering er tilvejebragt en irrever sibel snaplåsning.In FIG. 9 is a perspective view of a preferred embodiment of a nut according to the invention. The nut, designated in its entirety with the reference numeral 40, comprises a nut body 41 which is externally formed with an operating surface 42 for interaction with a tool not shown, for example in the form of a wrench. In a cross section, the nut shown will have a hexagonal cross section. To obtain a substantially circular cross-section at the ends of the nut in the axial direction, it is formed with a circumferential bead 43. At both ends of the nut 40, bushings with an internal thread 45 are provided for screwing in with an external screw shaft. Between respective bushings 44 and the body 41 of the nut, a torque limiting coupling of the embodiment of FIG. 6 and 7. FIG. 8 is a longitudinal sectional view of FIG. 9. It is seen that the body of the nut is divided into two chambers 46 with an integral partition 47 with the body. This tooth ring 50 is shown in the chamber 46 on the right, the bushing 44 being omitted here for the same reason. The bushings 44 are retained in the chambers 46, the parts being respectively formed with a bead 51 and a groove 35 52 so that, after mounting, an irreverible snap lock is provided.

12 DK 173099 B112 DK 173099 B1

Fig. 10 viser den samme møtrik som vist i fig. 8 og 9, idet dette billede er et eksploderet view. Hermed fremgår den rundtgående vulst 51 med større tydelighed. Samtidig 5 ses det, at bøsningen 44 er udformet med en reduktion i diameteren i et afsnit 54, idet dette afsnit skal give frigang til tandkransen 50, imens et tilgrænsende afsnit 53 tjener som lejevæg mod kammeret 46's indvendige cylindervæg .FIG. 10 shows the same nut as shown in FIG. 8 and 9, this image being an exploded view. This shows the circumferential bead 51 with greater clarity. At the same time, it is seen that the sleeve 44 is formed with a reduction in the diameter of a section 54, this section having to release the tooth rim 50, while an adjacent section 53 serves as a bearing wall against the inner cylinder wall of the chamber 46.

1010

Fig. 11 viser anvendelsen af en skrue ifølge fig. 5, og denne er her markeret med henvisningstallet 60. Fire skruer 60 af denne art fastholder et pladeformet byggeelement 61 til en rammekonstruktion 6 2 opbygget med et 15 konstruktionsbyggesæts bjælkeformede byggeelementer 63. Byggeelementer 63 er udformet med gevindskårne huller svarende til gevindet på skruen 60's skaft, og pladen 61 har huller, hvorigennem skaftet på skruen 60 kan passere uhindret. Kun et fåtal af disse huller er vist og kan i 20 øvrigt placeres efter behov, men hensigtsmæssigt vil hullerne være anbragt i et modulmål svarende til legetøjs-byggesættets øvrige byggeelementer.FIG. 11 shows the use of a screw according to FIG. 5, and here it is marked with reference numeral 60. Four screws 60 of this kind retain a plate-shaped building element 61 for a frame structure 6 2 constructed with the beam-shaped building elements 63 of a structural building set 63. Building elements 63 are formed with threaded holes corresponding to the thread of the screw 60 and the plate 61 has holes through which the shaft of the screw 60 can pass unobstructed. Only a few of these holes are shown and can otherwise be placed as required, but suitably the holes will be arranged in a module dimension corresponding to the other building elements of the toy building set.

En vognbund 65 er vist på fig. 12, og denne kendes fra en 25 international patentansøgning nr. PCT/DK92/00319. Vognbunden 65 adskiller sig fra den i nævnte ansøgning viste vognbund ved, at de gevindskårne huller langs siderne af elementet er udformet med en momentbegrænsende kobling af den i fig. 6 og 7 viste art. Et længdesnit langs linien 30 VI-VI vil således svare til den på fig. 6 og 7 viste moment begræns ende kobling, og yderparten 31 vil have udad-vendende aksiale ribber eller riller for at kunne fastholdes med vognbundlegemet eller vil være integreret i denne. Af produktionstekniske årsager foretrækkes sædvan-35 ligvis, at den momentbegrænsende kobling er udformet som et selvstændigt sprøjtestøbt indsatselement af plast. In- 13 DK 173099 B1 derparten 32 vil ved den i fig. 12 viste anvendelse være udformet med et indvendigt gevind i bøsningens aksiale retning. Vognbunden ses i øvrigt at være udformet med koblingstappe 67 på oversiden og derimellem anbragte 5 skruehuller 66.A wagon bottom 65 is shown in FIG. 12, and this is known from an international patent application No. PCT / DK92 / 00319. The carriage bottom 65 differs from the carriage bottom shown in said application in that the threaded holes along the sides of the element are formed with a torque limiting coupling of the one shown in FIG. 6 and 7. Thus, a longitudinal section along line 30 VI-VI will be similar to that of FIG. 6 and 7 limit end coupling and the outer portion 31 will have outwardly extending axial ribs or grooves to be retained with the carriage bottom body or integrated therein. For production-technical reasons, it is usually preferred that the torque limiting coupling is designed as a self-injection injection molded plastic element. In part 13, the part 32 will, in the embodiment shown in FIG. 12 is designed with an internal thread in the axial direction of the sleeve. The bottom of the carriage is also seen to be formed with coupling pins 67 on the upper side and in between 5 screw holes 66 are arranged.

På grund af at tænderne i den momentbegrænsende kobling er asymmetriske, sikres det, at møtrikken eller skruen skrues fast med et moment, der ikke overskrider en forud-10 bestemt grænseværdi, og efterfølgende vil kunne løsnes ved påvirkning med et væsentlige større moment.Because the teeth of the torque limiting coupling are asymmetrical, it is ensured that the nut or screw is tightened with a torque that does not exceed a predetermined limit value and can subsequently be loosened by operation with a substantially greater torque.

Opfindelsen er velegnet til udøvelse i forbindelse med sprøjtestøbte produkter af plast, men er ikke begrænset 15 hertil, idet det fx vil være fordelagtigt at udøve opfindelsen i forbindelse med komposit legetøj, hvor fx skruer af plast skrues i klodser af træ med gevindskårne huller.The invention is suitable for practice in connection with injection molded plastic products, but is not limited thereto, for example, it will be advantageous to practice the invention in connection with composite toys where, for example, plastic screws are screwed into wooden blocks with threaded holes.

Claims (15)

1. Skrue omfattende et hoved (1) og et skaft (2) med et gevindafsnit (3) til iskruning i et forud tilvirket hul 5 med et modsvarende gevindafsnit, hvor hovedet (1) og skaftet (2) er udformet på to adskilte parter (10, 20), og hvor der mellem hovedet (1) og skaftet (2) er tilvejebragt en momentbegrænsende kobling (30) omfattende en på den ene part (10) anbragt rundtgående tandkrans (31) med 10 indadvendende tænder, og et antal udadvendende tænder (32) på den anden part (20), så at parterne (10, 20) vil kunne drejes indbyrdes, når momentet mellem dem overstiger en forudbestemt størrelse, kendetegnet ved, at skruen er fremstillet af plast ved sprøjtestøbning, og 15 at den momentbegrænsende koblings (30) udadvendende tænder (32) er fjedrende i radial retning for indgreb med tandkransen (31).A screw comprising a head (1) and a shaft (2) with a threaded section (3) for screwing in a pre-made hole 5 with a corresponding threaded section, the head (1) and the shaft (2) being formed on two separate parts. (10, 20) and wherein between the head (1) and the shaft (2) there is provided a torque limiting coupling (30) comprising a circular tooth ring (31) with 10 inwardly facing teeth (1) and a plurality of teeth. outwardly extending teeth (32) on the other part (20) so that the parts (10, 20) can be rotated mutually when the torque between them exceeds a predetermined size, characterized in that the screw is made of plastic by injection molding, and 15 that the outwardly extending teeth (32) of the torque limiting coupling (30) are resilient in the radial direction for engagement with the tooth rim (31). 2. Skrue ifølge krav 1, kendetegnet ved, at ho-20 vedet er udformet med en angrebsflade (11), hvormed det kan betjenes med et værktøj.Screw according to claim 1, characterized in that the head is formed with an attack surface (11) with which it can be operated with a tool. 3. Skrue ifølge krav 1, kendetegnet ved, at parten (10) med hovedet (1) har en cylindrisk krop (12) 25 med den rundtgående tandkrans (31) anbragt indvendig, og at de fjedrende tænder (32) er anbragt på parten (20) med skaftet (2) og vendende udad for indgreb med tandkransen (31).Screw according to claim 1, characterized in that the part (10) with the head (1) has a cylindrical body (12) 25 with the circumferential tooth ring (31) arranged inside and that the resilient teeth (32) are arranged on the part (20) with the shank (2) and facing outwards for engagement with the tooth rim (31). 4. Skrue ifølge krav 1-3, kendetegnet ved, at at hovedpartens (10) cylindriske krop (12) i aksial retning har to anslag (13, 91), hvorved en vandring af skaftparten (20) i aksial retning tillades, idet denne vandring begrænses af de to anslags (13, 91) samvirkning 35 med fremspring (24, 37) på skaftet i dets radiale ret ning. DK 173099 B1Screw according to claims 1-3, characterized in that the cylindrical body (12) of the main part (10) in the axial direction has two stops (13, 91), thereby permitting a walking of the shaft part (20) in the axial direction, travel is limited by the interaction 35 of the two stops (13, 91) with projections (24, 37) on the shaft in its radial direction. DK 173099 B1 5. Skrue ifølge krav 1-4, kendetegnet ved, at skaftparten (20) omfatter en hul cylinderkrop med en central cylinderformet del (23), der i den ene ende er åben og afsluttes i et rundtgående fremspring (24, 37) i radi- 5 al retning, og som i den anden ende er lukket og afsluttes gennem en aftrapning (22) i et gevindafsnit (3).Screw according to claims 1-4, characterized in that the shank part (20) comprises a hollow cylinder body with a central cylindrical part (23) which is open at one end and terminates in a circular projection (24, 37) in radius. - all directions, which are closed at the other end and terminated by a step (22) in a threaded section (3). 6. Skrue ifølge krav 5, kendetegnet ved, at de fjedrende anbragte tænder (38) er sammenhængende med cy- 10 linderkroppen (23) gennem tynde stilke (36) og udgør en del af det rundtgående fremspring (24, 37).A screw according to claim 5, characterized in that the resiliently arranged teeth (38) are connected to the cylinder body (23) through thin stems (36) and form part of the circumferential projection (24, 37). 7. Skrue ifølge krav 5 eller 6, kendetegnet ved, at der findes et fjedrende element (25), der for- 15 spænder skruens hoved (1) og skaft (2) i aksial retning.A screw according to claim 5 or 6, characterized in that a resilient element (25) is provided which biases the screw head (1) and shaft (2) in the axial direction. 8. Skrue ifølge krav 1-7, kendetegnet ved, at såvel tandkransens tænder (33) soro de fjedrende tænder (38) er udformet asymmetrisk, så at de i rundtgående ret- 20 ning er udformet med forskellig stigning i retning henholdsvis med og mod uret.Screw according to claims 1-7, characterized in that both the teeth of the dental ring (33) are arranged asymmetrically so that the teeth (38) are designed in a circular direction with different increments in the direction with and against respectively. clock. 9. Skrue ifølge krav 1-8, kendetegnet ved, at skruehovedet (1) er udformet med et koblingshoved (90) 25 vendende bort fra skaftet (2), hvilket koblingshoved (90) er indrettet til en udløselige sammenkobling med et i et legetøjsbyggesæt indgående element.Screw according to claims 1-8, characterized in that the screw head (1) is formed with a coupling head (90) facing away from the shaft (2), which coupling head (90) is arranged for a releasable coupling with a in a toy building set. incoming element. 10. Skrue ifølge krav 9, kendetegnet ved, at 30 koblingshovedet (90) er monteret på skruehovedet (1) gennem i irreversibel snapkobling, idet skruehovedet (1) har en cylinderpart med en vulst (17) for optagelse i en tilsvarende åbning på koblingshovedet (90), og at koblingshovedet (90) har et cylindrisk fremspring (91) koaksialt 35 med åbningen for optagelse i cylinderparten. DK 173099 B1Screw according to claim 9, characterized in that the coupling head (90) is mounted on the screw head (1) through an irreversible snap coupling, the screw head (1) having a cylinder part with a bead (17) for accommodating in a corresponding opening on the coupling head. (90) and that the coupling head (90) has a cylindrical projection (91) coaxial 35 with the opening for receiving into the cylinder portion. DK 173099 B1 11. Skrue ifølge krav 1-10, kendetegnet ved, at skruehovedet (1) er sammenhængende med en drejeligt lejret, kasseformet part (80) med koblingsorganer for sammenkobling med et byggeelement indgående i et legetøjs- 5 byggesæt, og at skaftet (2) i en yderstilling rager uden for den kasseformede part (80), og i en anden yderstilling er beliggende fuldstændig inden for denne part (80).A screw according to claims 1-10, characterized in that the screw head (1) is connected to a pivotally mounted, box-shaped part (80) with coupling means for coupling with a building element included in a toy building set and that the shaft (2) in one outer position protrudes outside the box-shaped portion (80), and in another outer position is located completely within that portion (80). 12. Møtrik med en krop (41), hvori findes et hul med et 10 gevindafsnit (45) til påskruning på et forud tilvirket skaft med et modsvarende gevindafsnit, hvor hullet er tilvirket i en bøsning (44), idet kroppen (41) og bøsningen (44) er udformet på to adskilte parter, og hvor der mellem kroppen (41) og bøsningen (44) er tilvejebragt en 15 momentbegrænsende kobling (49, 50), så at parterne (41, 44. vil kunne drejes indbyrdes, når momentet mellem dem overstiger en forudbestemt størrelse, kendetegnet ved, at møtrikken skruen er fremstillet af plast ved sprøjtestøbning, og at den momentbegrænsende kobling 20 (49, 50) omfatter en på den ene part anbragt rundtgående tandkrans (50) med indadvendende tænder, og et antal udadvendende tænder (49), der er anbragt på den anden part og er fjedrende i radial retning for indgreb med tandkransens (50) tænder. 25A nut with a body (41), in which is provided a hole with a threaded portion (45) for screwing on a pre-made shaft with a corresponding threaded portion, the hole being made in a bush (44), the body (41) and the bush (44) is formed on two separate parts, and where a torque limiting coupling (49, 50) is provided between the body (41) and the bush (44) so that the parties (41, 44) can be rotated mutually when the torque between them exceeds a predetermined size, characterized in that the nut screw is made of plastic by injection molding, and that the torque limiting coupling 20 (49, 50) comprises a circular tooth ring (50) disposed on one part with inwardly facing teeth, and a a plurality of outwardly facing teeth (49) disposed on the other portion and resilient in radial direction for engagement with the teeth of the dental rim (50). 13. Møtrik ifølge krav 12, kendetegnet ved, at kroppen (41) er udformet med en angrebsflade (42), hvormed det kan betjenes med et værktøj. 30Nut according to claim 12, characterized in that the body (41) is formed with an attack surface (42) with which it can be operated with a tool. 30 14. Møtrik ifølge krav 12, kendetegnet ved, at bøsningen har en cylindrisk part med de fjedrende tænder (49) anbragt, så de vender udad, og at den rundtgående tandkrans (50) er anbragt på kroppen og med tænderne vendende indad for indgreb med tænderne (49). DK 173099 B1Nut according to claim 12, characterized in that the sleeve has a cylindrical part with the resilient teeth (49) arranged so that they face outwards, and that the circumferential tooth ring (50) is arranged on the body and with the teeth facing inwards for engagement with the the teeth (49). DK 173099 B1 15. Møtrik ifølge krav 12-14, kendetegnet ved, at såvel tandkransens (50) tænder som de fjedrende anbragte tænder (49) er udformet asymmetrisk, så at de i rundtgående retning har forskellig stigning i retning 5 henholdsvis med og mod uret.Nut according to claims 12-14, characterized in that both the teeth of the dental ring (50) and the resiliently arranged teeth (49) are designed asymmetrically, so that they have a different pitch in the direction 5 and clockwise respectively.
DK56494A 1994-05-18 1994-05-18 Screw and nut with built-in torque limiting clutch DK173099B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DK56494A DK173099B1 (en) 1994-05-18 1994-05-18 Screw and nut with built-in torque limiting clutch
AU25221/95A AU2522195A (en) 1994-05-18 1995-05-18 A screw, a nut or a toy building element having a threaded section, as well as use of a torque limiting coupling in that connection
PCT/DK1995/000198 WO1995031646A1 (en) 1994-05-18 1995-05-18 A screw, a nut or a toy building element having a threaded section, as well as use of a torque limiting coupling in that connection
DE29521329U DE29521329U1 (en) 1994-05-18 1995-05-18 A screw, a nut or a toy component with a threaded section and the use of a torque limiting coupling when connecting them
JP1997000024U JP3046122U (en) 1994-05-18 1997-01-07 Use of screws, nuts or toy building elements with threaded parts and the use of torque limiting couplings in the connection of the elements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK56494 1994-05-18
DK56494A DK173099B1 (en) 1994-05-18 1994-05-18 Screw and nut with built-in torque limiting clutch

Publications (2)

Publication Number Publication Date
DK56494A DK56494A (en) 1995-11-19
DK173099B1 true DK173099B1 (en) 2000-01-17

Family

ID=8094970

Family Applications (1)

Application Number Title Priority Date Filing Date
DK56494A DK173099B1 (en) 1994-05-18 1994-05-18 Screw and nut with built-in torque limiting clutch

Country Status (5)

Country Link
JP (1) JP3046122U (en)
AU (1) AU2522195A (en)
DE (1) DE29521329U1 (en)
DK (1) DK173099B1 (en)
WO (1) WO1995031646A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK200101487A (en) * 2001-10-09 2003-04-10 Lego As Toy vessel comprising flexible elements
DE102014108035B4 (en) * 2014-06-06 2021-05-12 Voss Automotive Gmbh Screw part with integrated limiter for its screw-in torque
US20160281759A1 (en) * 2015-03-24 2016-09-29 Revell Gmbh Connection System for Detachably Connecting Components and Kit With Such

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2373812A (en) * 1944-02-14 1945-04-17 William L Coop Torque thumbscrew
US2685812A (en) * 1951-03-22 1954-08-10 George A Dmitroff Constant torque nut
US3280690A (en) * 1964-02-28 1966-10-25 Norman N Rubin Torque limiting nut
US3425314A (en) * 1967-08-09 1969-02-04 John F Ohlson Spring beam load limiting nut
DK172267B1 (en) * 1991-11-06 1998-02-16 Lego As Toy building kits and building elements therefor

Also Published As

Publication number Publication date
AU2522195A (en) 1995-12-05
WO1995031646A1 (en) 1995-11-23
DE29521329U1 (en) 1997-01-02
JP3046122U (en) 1998-02-24
DK56494A (en) 1995-11-19

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