DE149864C

DE149864C -

Info

Publication number: DE149864C
Application number: DENDAT149864D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die vorliegende Erfindung betrifft eine Fahrradbremse, bei welcher die Übertragung" der auf den Bremshebel ausgeübten Kraft auf das eigentliche Bremsorgan, Bremsklötze 5 oder dergl., durch Vermittlung einer Blattfeder oder dergl. erfolgt, die beim Anziehen der Bremse gespannt, bei der Freigabe des Bremshebels sich dagegen entspannt und dadurch die Arbeitsteile in ihre RuhelageThe present invention relates to a bicycle brake in which the transmission " the force exerted on the brake lever on the actual braking element, brake pads 5 or the like., By mediation of a leaf spring or the like. Takes place when tightening the brake is tensioned, but when the brake lever is released it relaxes and thereby the working parts in their rest position

ίο zurückführt.ίο leads back.

Es sind bereits derartige Fahrradbremsen bekannt geworden, bei denen eine die Gestalt eines nach unten geöffneten Bügels besitzende Blattfeder zur Anwendung gelangt, die den Radreifen umschließt, oben in ihrer Mitte an der Bremszugstange befestigt und mit ihren beiden unteren Enden an der Vorderradgabel festgelegt ist. Die beiden etwas oberhalb der letztgenannten Befestigungspunkte auf der Blattfeder befestigten Bremsklötze werden hier durch Anziehen der Zugstange seitlich gegen die Radfelge gepreßt. Gemäß einer anderen Anordnung ist in ähnlicher Weise an dem unteren Ende der Zugstange ein Drahtbügel befestigt, dessen beide untere Enden mit zwei starren, an der Vorderradgabel gelagerten, die an der Radfelge angreifenden Bremsbacken tragenden Doppelhebeln verbunden sind, die durch Anzug der Zugstange in Bremsstellung, beim Loslassen der Zugstange durch die Federkraft des Bügels in Lösestelluug bewegt werden.Such bicycle brakes are already known in which one has the shape a downwardly open bracket owning leaf spring is used that the Enclosing wheel tires, attached to the brake tie rod at the top in their center and with their both lower ends is fixed to the front fork. The two just above the The latter attachment points are brake pads attached to the leaf spring here pressed against the wheel rim by tightening the pull rod. According to a Another arrangement is similarly at the lower end of the pull rod a wire hanger attached, the two lower ends of which with two rigid, mounted on the front fork, the double levers bearing the brake shoes acting on the wheel rim are connected by tightening the pull rod in braking position, when releasing the drawbar due to the spring force of the bracket in Release position can be moved.

Gegenstand der vorliegenden Erfindung ist nun eine Fahrradbremse, bei welcher die Feder über einen gekrümmten Arm geführt ist, der die Fortsetzung des zum Anziehen der Bremse dienenden Hebels bildet und einen kleineren Krümmungsradius als die an ihm nahe seinem Drehpunkt befestigte Feder besitzt, so daß zwischen dem Arm und der Feder bei der Lösestellung der Bremse ein ge\visser Spielraum verbleibt. Infolge der hierdurch bedingten, beim Anziehen der Bremse stattfindenden allmählichen Anspannung der Feder, die erst nach ihrer vollständigen Anlage an dem Arm eine starre Verbindung . zwischen Bremshebel und Bremsorgan herstellt, wird die auf ersteren ausgeübte Kraft nur allmählich zur Wirkung gebracht .- und so ein ruckweises Bremsen verhütet.The present invention is now a bicycle brake in which the Spring is guided over a curved arm, which is the continuation of the tightening the lever serving the brake and forms a smaller radius of curvature than the one on has spring attached to it near its pivot point, so that between the arm and the When the brake is released, a certain amount of leeway remains. As a result of the resulting gradual tension that takes place when the brake is applied the spring, which only forms a rigid connection after it has been fully attached to the arm. between brake levers and a braking element, the force exerted on the former only gradually becomes Bringing an effect - and thus preventing sudden braking.

Die neue Federanordnung kann sowohl bei gewöhnlichen Felgenbremsen wie auch bei durch Rückwärtstreten zu bewegenden Bremsen zur Anwendung gelangen.The new spring arrangement can be used with conventional rim brakes as well as with Brakes to be moved by stepping backwards are applied.

Auf den beiliegenden Zeichnungen ist die Erfindung in Anwendung an verschiedenen Fahrradbremsen veranschaulicht:In the accompanying drawings, the invention is applied to various Bicycle braking illustrates:

Fig. ι ist eine Vorderansicht einer' durch Abwärtsdrücken des Handhebels anzuziehenden Felgenbremse für das Vorderrad eines Fahrrades, dargestellt für die gelöste Bremse,Fig. Ι is a front view of a 'to be attracted by pushing down the hand lever Rim brake for the front wheel of a bicycle, shown for the released brake,

Fig. 2 eine Seitenansicht zu Fig. 1 undFig. 2 is a side view of Fig. 1 and

Fig. 3 eine Teilansicht der Bremse nach Fig. ι und 2, wobei die Bremse angezogen ist.3 is a partial view of the brake according to FIGS. 1 and 2, the brake being applied.

Fig. 4 zeigt die Verbindungsfeder für sich.Fig. 4 shows the connecting spring by itself.

Fig. 5 und 6 zeigen die Verbindung der Feder mit einem beim Aufwärtsziehen die Bremse einrückenden Handhebel, undFig. 5 and 6 show the connection of the spring with a pulling up the Brake engaging hand lever, and

Fig. 7 und 8 die Anbringung der Feder bei einer Felgenbremse für das Hinterrad des Fahrrades.7 and 8 show the attachment of the spring in a rim brake for the rear wheel of the bike.

Claims

The brake shown in FIGS. 1 to 3 is activated by depressing the brake lever 9 attracted, which is hinged at 10 to a clamp 11 on the handlebar 12 and extends beyond the joint into a shorter curved arm 13. This lever is connected to the upper end of the adjustable pull rod 14 by an arcuate leaf spring 15 coupled, one end 16 of which by means of a screw 17 or in some other suitable manner Manner on the brake lever 9 in one between the joint 10 and the outer end of the curved arm 13 lying points, while the other end 18 to the head 19 of the brake

- rod is lying around. Since the arm 13 has the shape of an arc, its radius when the brake is released is smaller than the

, mung radius of the leaf spring 15, remains in the release position, between the spring and the arm 13 a free space, as from FIG. 1 evident. This clearance allows the brake to be applied gradually. First when the lever is fully depressed and the spring is close to the curved one Arm 13 applies (Fig. 3), is the connection between the brake lever and the brake rod practically a rigid one and the full braking force is transmitted.

The lower end of the brake rod is connected to the yoke of the brake, whose Legs 20 are connected to levers 21 hinged to fixed clamps 22. Latter wear the shoes 23 for the brake pads 24, which are brought into contact with the wheel rim 25 will.

In order to prevent the spring 15 from deflecting to the side or slipping off, is expediently a guide 26 attached to the clamp 11 is provided, which guide the leaf spring 15 as far away from the pivot point of the brake lever as possible laterally.

The brake is applied, as stated above, by depressing the Hand lever. When the pressure on the brake lever ceases, the tensioned spring 15 resumes its normal curvature on, presses the brake blocks off the bike, lifts the lever again against the handlebar and holds the working parts in this position (Fig. i).

In the arrangement according to FIGS. 5 and 6, the brake is to be applied upwards by means of a Brake lever 27 operated, which is hinged at 28 to a clamp 29, which is on the handlebar 30, but on the other Side of the steerer tube 31, is clamped.

The arcuate arm 32 is arranged so that it from the pivot point 28 of the brake lever reaches back towards the middle of the handlebar. The curved spring 33, which forms the flexible connection between the lever and the brake rod 34, acts in the same way as in the arrangement of FIGS. 1 to 3. The spring is fastened at one end by screws 35, which are inserted between the lower side of the Clamp the brake lever 27 and the upper side of the bow arm 32 (Fig. 5) while the other end of the spring engages the brake rod 34 and through a guide 37 is protected against sideways evasion.

In the embodiment according to FIGS. 7 and 8, the lever 38, which is connected to the brake rod 39 is connected by the curved spring 40, at 41 on a clamp 42 on the lower tube 43 of the 'bicycle frame immediately in front of the crank axle bearing hinged, and is guided by means of a hand lever 44, a rod 45 and a disk 47 and at 48 attached to the lever 38 pull wire 46 or the like. Adjusted. This lever 38 has a curved extension 49, the diameter of which is smaller than the normal radius of curvature the spring 40. The spring is screwed to this extension 49 at one end 50 and is connected to the rod 39 at the other end of the brake yoke in connection.

When the brake is applied, the spring is tensioned, which also causes a gradually increasing braking effect and on the other hand also causes the release of the Brake in the same way as in the aforementioned arrangements. '

Pat τ claim: '

Bicycle brake with the transfer of the braking force from the brake lever to 'the Brake pads mediate the leaf spring releasing the brake when the brake lever is released, characterized in that <the brake lever (9) ends in a curved arm (13) whose radius of curvature is smaller than that in the release position, close to the pivot point of the arm attached and guided on the latter spring (15), so that in the release position between the spring and arm remains a margin that is left when tightening the brake gradually disappears, for the purpose of a gradual tension of the spring and thus a gradual To achieve an increase in the braking effect.

1 sheet of drawings.