DE19643583A1

DE19643583A1 - Locking device for a nut

Info

Publication number: DE19643583A1
Application number: DE1996143583
Authority: DE
Inventors: Peter Busse
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-11
Filing date: 1996-10-11
Publication date: 1998-04-23
Also published as: WO1998016751A1

Abstract

The invention concerns a locking device for a screwed part (1) which is mounted on a threaded rod (7) and is used to connect a second object (8) to a first object. The locking device consists of a key and a cap (3) whose base is located between the screwed part (1) and one of the objects (8) and whose cylinder wall surrounds the screwed part (1) and terminates in the region of the end face of the latter. The surfaces, in particular the generated surfaces, of the screwed parts (1) of a plurality of first objects differ from one another, and the part of the key grasping the screwed parts (1) is adapted in a form-locking manner thereto. The cap (3) is at such a short distance from the point of the screwed part (1) which projects furthest outwards radially that the key can surround the screwed part (1). The invention is characterized in that, located between the screwed part (1) and the abutment surface of one of the objects (8) which faces the latter, are stop means (4, 5, 2, 9) which prevent the screwed part (1) from rotating and working loose, and can be brought into their unlocking position only by the key when it is placed on the screwed part (1). In this way, objects are rendered particularly secure against theft.

Description

Die Erfindung bezieht sich auf eine Verriegelungsvorrichtung für eine Mutter gemäß Oberbegriff von Anspruch 1.The invention relates to a locking device for a mother according to the preamble of claim 1.

Insbesondere handelt es sich bei dem ersten Gegenstand um Teile eines Fahrrades (Räder, Sattel, Sattelstange und der gleichen) und bei dem zweiten Gegenstand um den Fahrradrahmen.In particular, the first item is Parts of a bicycle (wheels, saddle, seat post and the same) and the second item around the Bicycle frame.

Eine Vorrichtung dieser Art ist durch das Gebrauchsmuster 94 13 391 bekannt geworden.A device of this type is by the utility model 94 13 391 became known.

Der Erfindung liegt die Aufgabe zugrunde, ein Aufdrehen der Mutter zu erschweren bzw. gänzlich unmöglich zu machen. Diese Aufgabe wird, wie im Kennzeichen des Anspruchs 1 angegeben ist, gelöst.The invention has for its object to open the To complicate mother or make it completely impossible. This Task is as specified in the characterizing part of claim 1 is solved.

Auf diese Weise wird erreicht, daß man auch nicht mit den raffiniertesten Werkzeugen oder Handhabungen die Mutter auf drehen kann.In this way it is achieved that one does not use the the most sophisticated tools or manipulations can turn.

Weiterhin wird vorgeschlagen das, was im Anspruch 2 steht. Wird die Mutter von dem ihr zugeordneten Schlüssel erfaßt, dann drückt dieser alle Rastnasen von der Mutter weg, und die Mutter kann gedreht werden. Sollte jedoch ein Dieb mittels eines Schraubendrehers eine Rastnase wegdrücken, dann würden die übrigen Rastnasen die Mutter arretieren.It is also proposed what is in claim 2. If the mother is identified by the key assigned to her, then he pushes all the tabs away from the mother, and the Mother can be turned. However, should a thief use a screwdriver would push away a catch, then the remaining locking lugs lock the nut.

Weitere Einzelheiten der Erfindung ergeben sich aus der Zeichnung. Darin zeigenFurther details of the invention emerge from the Drawing. Show in it

Fig. 1 eine Ausführungsform der Erfindung in explodierter Form, Fig. 1 shows an embodiment of the invention in exploded form,

Fig. 2 die Ausführungsform der Fig. 1 in zusammengesetzter Form, Fig. 2 shows the embodiment of FIG. 1 in assembled form,

Fig. 3 einzelne Teile der erfindungsgemäßen Ausführungsform, Fig. 3, individual parts of the embodiment according to the invention,

Fig. 4 eine weitere Einzelheit der erfindungsgemäßen Ausführungsform, Fig. 4 shows a further detail of the embodiment according to the invention,

Fig. 5 eine Einzelheit und Fig. 5 shows a detail and

Fig. 6 eine Seitenansicht einer Mutter gemäß der Erfindung. Fig. 6 is a side view of a nut according to the invention.

Wie sich aus den Fig. 1 und 2 ergibt, besteht die erfin dungsgemäße Ausführungsform aus einer Mutter 1, einer Feder scheibe 2, einer Kappe 3, einer Scheibe 4 mit Sockel 5 und einer Teflonscheibe 6. Die Mutter 1 ist auf einer Gewinde stange 7 aufgeschraubt. Diese sitzt z. B. an einem Rad eines Fahrrades. Die Fahrradgabel ist mit 8 bezeichnet. Im ange spannten Zustand drückt die Mutter 1 über den Sockel 5 der Andruckscheibe 4 gegen die Fahrradgabel 8 und hält auf diese Weise das Rad an der Gabel. Die Kappe 3 ist frei drehbar. Die Federscheibe 2 besitzt Rastnasen 9 (siehe die Fig. 3 bis 5), die normalerweise in Einbuchtungen 10 (siehe die Fig. 5 und 3) der Mutter 1 einrasten können bzw. je nach der Stel lung der Teile zueinander eingerastet sind.As can be seen from FIGS . 1 and 2, the embodiment according to the invention consists of a nut 1 , a spring washer 2 , a cap 3 , a washer 4 with a base 5 and a Teflon washer 6 . The nut 1 is screwed onto a threaded rod 7 . This sits z. B. on a wheel of a bicycle. The bicycle fork is labeled 8. In the clamped state, the nut 1 presses over the base 5 of the pressure plate 4 against the bicycle fork 8 and in this way holds the wheel on the fork. The cap 3 is freely rotatable. The spring washer 2 has locking lugs 9 (see FIGS . 3 to 5), which can normally snap into indentations 10 (see FIGS. 5 and 3) of the nut 1 or, depending on the position of the parts, are snapped together.

Zum Abdrehen der Mutter 1 von der Gewindestange 7 wird ein (nicht dargestellter) Schlüssel über die Mutter 1 gestülpt und so weit in Richtung auf die Fahrradgabel 8 gedrückt, daß die Rastnasen 9 die Kerben 10 freigeben. Nun kann durch Dre hen des Schlüssels die Mutter 1 gedreht werden. Ein Drehen der Mutter 1 ist nicht möglich, wenn man z. B. mittels eines Schraubendrehers lediglich eine Rastnase 9 aus ihrer Kerbe herausdrückt, weil dann die Mutter 1 durch die übrigen Rast nasen 9 gehalten wird.To unscrew the nut 1 from the threaded rod 7 , a key (not shown) is placed over the nut 1 and pressed so far in the direction of the bicycle fork 8 that the detents 9 release the notches 10 . Now the nut 1 can be turned by turning the key. A turning of the nut 1 is not possible if, for. B. by means of a screwdriver only pushes a locking lug 9 out of its notch, because then the nut 1 is held by the remaining locking lugs 9 .

Der Umfang der Mutter 1 und damit der Innenwand des Schlüs sels ist individuell geformt, so daß nur derjenige die Mutter 1 abdrehen kann, der den ihr zugeordneten Schlüssel besitzt.The circumference of the nut 1 and thus the inner wall of the key is individually shaped so that only the one who can turn off the nut 1 has the key assigned to it.

Aus den Fig. 3 bis 5 ergeben sich weitere Einzelheiten der Erfindung.To 5, further details of the invention will be apparent from Figs. 3.

Fig. 6 zeigt eine Seitenansicht einer erfindungsgemäßen Mut ter 1. Diese besteht aus einem zylindrischen Teil 11, das individuell geformt ist, und einem konischen Teil 12. Fig. 6 shows a side view of a courage invention ter. 1 This consists of a cylindrical part 11 , which is individually shaped, and a conical part 12 .

Claims

1. Locking device for a nut, which sits on a threaded rod of a first object and holds a two-th object on the first object, consisting of a key and a cap, the bottom of which, when the nut sits on its thread, between the nut and the second The object is located, the cylinder wall surrounds the mother and ends in the area of the end face of the mother and which is freely rotatable in the tightened state, the surface, in particular lateral surfaces of the nuts of several first objects differ from one another, the part of the key capturing the nuts the nut or several nuts of the first object is form-fittingly adapted and the cap has such a small distance from the most radially outwardly projecting point of the nut that the key can grip around the nut, characterized in that between nut ( 1 ) and second object ( 8 ) a locking part ( 4 , 5 , 9 ), which locks the nut ( 1 ) against loosening and can only be brought into its unlocking position when it is placed on the nut ( 1 ).

2. Locking device according to claim 1, characterized in that the locking part is a first washer, in particular a special spring washer ( 2 ), which in the tense state was rotatably connected to the second object ( 8 ) and has a plurality of detents ( 9 ), which, from the outside without load, can snap into indentations ( 10 ) of the nut ( 1 ) and release the nut ( 1 ) by pressure from outside.

3. Locking device according to claim 2, characterized in that between the two objects ( 7 , 8 ) is a second disc ( 4 ) which is firmly connected to the second object ( 8 ) in the tensioned state and in particular a special knurling has the second object ( 8 ) opposite and which has a central, the cap ( 3 ) through the base ( 5 ) non-circular, in particular polygonal, in particular quadrangular shape, which rests in the strained state of the nut ( 1 ), and that the first disc ( 2 ) encompasses the base ( 5 ) in a form-fitting manner and thus in a rotationally fixed manner.

4. Locking device according to one or more of claims 1 to 3, characterized in that the nut ( 1 ) tapers conically outwards.

5. Locking device according to claim 4, characterized in that the nut ( 1 ) outside of a short cylindri's inner part ( 11 ) and an adjoining ko African part ( 12 ).