DE2736131A1 - Locking screw with short plain shank - having frusto=conical section immediately under grooved head and expanding towards it - Google Patents

Locking screw with short plain shank - having frusto=conical section immediately under grooved head and expanding towards it

Info

Publication number
DE2736131A1
DE2736131A1 DE19772736131 DE2736131A DE2736131A1 DE 2736131 A1 DE2736131 A1 DE 2736131A1 DE 19772736131 DE19772736131 DE 19772736131 DE 2736131 A DE2736131 A DE 2736131A DE 2736131 A1 DE2736131 A1 DE 2736131A1
Authority
DE
Germany
Prior art keywords
screw
conical section
frusto
head
immediately under
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE19772736131
Other languages
German (de)
Inventor
Fritz Dipl Ing Kutter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19772736131 priority Critical patent/DE2736131A1/en
Publication of DE2736131A1 publication Critical patent/DE2736131A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16B35/00Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/041Specially-shaped shafts
    • F16B35/048Specially-shaped necks

Landscapes

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

Abstract

The screw locking arrangement is suitable for screws which have a short length of plain shank under the screw head. The section (3) of plain shank immediately under the head is conical, enlarging in diameter towards the head (1). The conical section jams in the hole and locks the screw. As the conical section jams in the hole, part of the material is deformed upward. The screw head has an annular groove (4) to take up this deformed material.

Description

i3eschreibungi3description

zur Patentanmeldung betreffend Gegen Drehen gesicherte Schraube Die Erfindung betrifft eine gegen Drehen gesicherte Schraube, bei welcher zwischen Schraubenkopf und Schaft ein Konus angeordnet ist. to the patent application concerning anti-rotation secured screw Die The invention relates to a screw secured against turning, in which between the screw head and a cone is arranged on the shaft.

Die sehr häufig angewendeten, aus Schraube und Mutter bestehenden Schraubverbindungen haben den Mangel, daß die Schraube beim Anziehen der Mutter gegengehalten werden muß. Dieses Gegenhalten ist arbeitsaufwendig, lästig und mit Schwierigkeiten verbunden, wenn der Schraubenkopf schlecht zugänglich ist. The most commonly used ones, consisting of bolts and nuts Screw connections have the defect that the screw when tightening the nut must be countered. This counter-holding is labor-intensive, annoying and with Difficulties are associated when the screw head is difficult to access.

Es gibt auch Falle, bei denen der Schraubenkopf glatt sein muß, so daß kein Werkzeug angesetzt werden kann. Die Erfindung hat den Zweck, dieses Gegenhalten der Schraube zu vermeiden.There are also cases where the screw head has to be smooth, like this that no tool can be attached. The purpose of the invention is to counter this to avoid the screw.

Bei einer bekannten Schraube ist zwischen Schraubenkopf und Schaft ein Konus angeordnet, welcher sich im Schraubenloch, dessen Durchmesser etwas kleiner ist als der große Durchmesser des Konus, beim Anziehen der Mutter verklemmt, so daß sich die Schraube nicht mitdrehen kann. In a known screw, there is between the screw head and the shaft a cone arranged, which is in the screw hole, the diameter of which is slightly smaller is than the large diameter of the cone, jammed when tightening the nut, so that the screw cannot turn.

Diese Schraube hat den Vorteil, daß sie ein reiner Drehkörper ist, sich also leicht herstellen läßt, und daß das Schraubenloch die übliche kreisrunde Form haben kann. Das Schraubenloch kann somit gebohrt werden und die zu verschraubenden Teile werden in geringstem Maße geschwächt. Von Nachteil ist jedoch, daß die mit dieser Schraube hergestellten Schraubverbindungen bei Belastung durch äußere Betriebskräfte, insbesondere solche schwellender Natur, die Vorspannung verlieren und sich somit lockern. Der Anwendungsbereich ist deshalb sehr beschränkt. This screw has the advantage that it is a pure rotating body, So it can be made easily, and that the screw hole is the usual circular one Can have shape. The screw hole can thus be drilled and the screw to be screwed Parts are weakened to the slightest extent. The disadvantage, however, is that with screw connections made with this screw under load by external operating forces, especially those of a swelling nature that lose pretension and thus become loosen. The area of application is therefore very limited.

Der Erfindung liegt die Aufgabe zugrunde, diese bekannte Schraube so zu verbessern, daß sie auch für hochbelastete Schraubverbindungen verwendet werden kann. The invention is based on the object of this known screw to be improved so that they can also be used for highly stressed screw connections can.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Konus über eine ringförmige Rille in die Schraubenkopffläche übergeht. According to the invention, this object is achieved in that the cone merges into the screw head surface via an annular groove.

Der Vorteil der Erfindung besteht darin, daß die erfindungsgemäße Schraube für alle Schraubverbindungen verwendet werden kann, auch solche, die durch äußere Betriebskräfte hoch belastet sind. Da außerdem die Vorteile der bekannten Schraube erhalten bleiben, indem das Schraubenloch die kreisrunde Form aufweist, ist eine universelle und allgemeine Anwendung der erfindungsgemaßen Schraube gegeben. The advantage of the invention is that the inventive Screw can be used for all screw connections, including those that go through external operating forces are highly stressed. Since also the advantages of the well-known Keep the screw in place by making the screw hole circular in shape, a universal and general application of the screw according to the invention is given.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. An embodiment of the invention is shown in the drawing and is described in more detail below.

Es zeigen Fig. 1 eine erfindungsgemäße Schraube mit einem Teilschnitt, Fig. 2 eine Schraubverbindung im ungespannten Zustand, Fig. 3 die gleiche Schraubverbindung im Vorgespannten Zustand, Fig. 4 eine Einzelheit aus Fig.3 in vergrößertem Maßstab.1 shows a screw according to the invention with a partial section, FIG. 2 shows a screw connection in the untensioned state, FIG. 3 shows the same screw connection in the pretensioned state, FIG. 4 shows a detail from FIG. 3 on an enlarged scale.

Wie in Fig.1 dargestellt ist, besteht die Schraube in bekannter Weise aus dem Schraubenkopf 1, dem Schaft 2 und dem dazwischen angeordnetem Konus 3, welcher erfindungsgemäß über die ringförmige Rille 4 in die Schraubenkopffläche 5 übergeht. As shown in Fig.1, the screw is in a known manner from the screw head 1, the shaft 2 and the cone 3 arranged between them, which according to the invention merges into the screw head surface 5 via the annular groove 4.

Die Schraube wird in der bekannten Weise in ein Schraubenloch eingesetzt, dessen Durchmesser etwas kleiner ist als der große Durchmesser des Konus 3 in Höhe der Schraubenkopffläche 5. Dies hat zur Folge, wie in Figur 2 dargestellt ist, daß der Konus 3 auf der Schraubenlochkante aufsitzt und die Schraubenkopffläche 5 zunächst noch nicht auf dem zu verschraubenden Teil 6 aufliegt. Wird nun die Mutter angezogen, dann verklemmt sich der Konus 3 im Schraubenloch, so daß sich die Schraube nicht mitdrehen kann. Im weiteren Verlauf wird der Konus 3 in das Schraubenloch hineingezogen, wodurch die Schraubenlochkante plastisch verformt wird. Das weggedrängte Material wirft sich in Form eines ringförmigen Wulstes 7 auf. Dieser Wulst 7 findet in der erfindungagemäßen Rille 4 Platz, so daß sich die Schraubenkopffläche 5 ungehindert und somit vollständig auf das zu verschraubende Teil 6 auflegen kann, wie aus Fig. 3 ersichtlich ist. Die Schraubenkopffläche 5 kann nunmehr die erforderliche Vorspannung aufnehmen und zusätzlich große, von außen her einwirkende Betriebskräfte übertragen. The screw is inserted into a screw hole in the known manner, whose diameter is slightly smaller than the large diameter of the cone 3 in height the screw head surface 5. This has the consequence, as shown in Figure 2, that the cone 3 rests on the edge of the screw hole and the screw head surface 5 first is not yet resting on the part 6 to be screwed. If the mother is now attracted, then the cone 3 jams in the screw hole so that the screw does not can turn. Then the cone 3 is pulled into the screw hole, whereby the screw hole edge is plastically deformed. The displaced material throws itself up in the form of an annular bead 7. This bead 7 takes place in the Invention groove 4 space so that the screw head surface 5 is unhindered and thus can lay completely on the part 6 to be screwed, as shown in Fig. 3 can be seen. The screw head surface 5 can now have the required preload absorb and also transfer large, externally acting operating forces.

In Fig. 4 ist der Deutlichkeit halber nochmals in vergrößerem Maßstab die erfindungsgemäße Rille 4 mit dem in ihr Platz findenden Wulst 7 dargestellt. For the sake of clarity, FIG. 4 is again on an enlarged scale the groove 4 according to the invention is shown with the bead 7 located in it.

- Patentanspruch -- claim -

Claims (1)

Patentanspruch Gegen Drehen gesicherte Schraube, bei welcher zwischen dem Schraubenkopf (1) und dem Schaft (2) ein Konus (3) angeordnet ist, d a d u r c h g e k e n n z e i c h n e t, daß der Konus (3) über eine ringförmige Rille (4) in die Schraubenkopffläche (5) übergeht. Patent claim Against turning secured screw, in which between the screw head (1) and the shaft (2) a cone (3) is arranged, d a d u r c h g e k e n n n z e i c h n e t that the cone (3) has an annular groove (4) merges into the screw head surface (5).
DE19772736131 1977-08-11 1977-08-11 Locking screw with short plain shank - having frusto=conical section immediately under grooved head and expanding towards it Pending DE2736131A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772736131 DE2736131A1 (en) 1977-08-11 1977-08-11 Locking screw with short plain shank - having frusto=conical section immediately under grooved head and expanding towards it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772736131 DE2736131A1 (en) 1977-08-11 1977-08-11 Locking screw with short plain shank - having frusto=conical section immediately under grooved head and expanding towards it

Publications (1)

Publication Number Publication Date
DE2736131A1 true DE2736131A1 (en) 1979-02-22

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DE19772736131 Pending DE2736131A1 (en) 1977-08-11 1977-08-11 Locking screw with short plain shank - having frusto=conical section immediately under grooved head and expanding towards it

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4473332A (en) * 1981-12-17 1984-09-25 Sturdy Truck Equipment, Inc. Anchor device bolt
AT379874B (en) * 1983-08-19 1986-03-10 Norma Gmbh TWIST PROTECTION FOR SCREW ELEMENTS
US4957402A (en) * 1989-05-05 1990-09-18 Klein Georg D T-nut with furrows
WO2002031278A1 (en) * 2000-10-11 2002-04-18 Weeks Peacock Quality Homes Pty Ltd Method of engaging a bolt with an aperture
WO2008095472A1 (en) * 2007-02-09 2008-08-14 Hommel Guenter Improved screw connection for transmission case and crankcase
WO2022128806A1 (en) * 2020-12-15 2022-06-23 Interroll Holding Ag Fastening screw

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4473332A (en) * 1981-12-17 1984-09-25 Sturdy Truck Equipment, Inc. Anchor device bolt
AT379874B (en) * 1983-08-19 1986-03-10 Norma Gmbh TWIST PROTECTION FOR SCREW ELEMENTS
US4957402A (en) * 1989-05-05 1990-09-18 Klein Georg D T-nut with furrows
WO2002031278A1 (en) * 2000-10-11 2002-04-18 Weeks Peacock Quality Homes Pty Ltd Method of engaging a bolt with an aperture
WO2008095472A1 (en) * 2007-02-09 2008-08-14 Hommel Guenter Improved screw connection for transmission case and crankcase
WO2022128806A1 (en) * 2020-12-15 2022-06-23 Interroll Holding Ag Fastening screw
DE102020133619B4 (en) 2020-12-15 2023-02-23 Interroll Holding Ag roller conveyor
DE102020133619B8 (en) 2020-12-15 2023-07-06 Interroll Holding Ag roller conveyor

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