DE1252087B - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CI .:

B 62 k

German class: 63 h -18

Number: 1252087

File number: A 42597 11/63 h

Filing date: March 14, 1963

Open date: October 12, 1967

The invention relates to a braking device for vehicles, in particular motorcycles, bicycles and Mopeds with brake shoes that act on a wheel rim and that are attached to a bearing block with the help of one pivotably mounted hand lever via a flexible pulling element that can be moved longitudinally in a casing can be actuated against the influence of a return spring and with a manually adjustable organ, which normally forms a stop for the hand lever to prevent its movement when opening the To limit brake shoes in a standby position, and can be brought into an ineffective position to the To be able to open the brake shoes further for the removal of the wheel.

In these known embodiments, the adjustable member is designed as a pivotable pawl, which is arranged on the bearing block with the aid of a bolt serving as a pivot axis and can be pivoted out of the path of movement of the hand lever when the brake shoes to Removing the wheel from its ready position should be opened further. These well-known Solutions have the disadvantage that they are relatively expensive and the handling of the latch is cumbersome in that both hands are usually required, one to press the hand lever to relieve the pawl and the other to operate the pawl. The latter is when wearing Gloves are also hardly possible.

The object of the present invention is to eliminate the disadvantages outlined. This is the case with the initially mentioned braking device achieved according to the invention in that the adjustable member as elongated, arranged in the interior of the hand lever leaf spring is formed, on which, the bearing block facing End part is attached a stop cam which can be displaced in an opening in the hand lever wall.

With this training, the hand lever and the adjustable organ can effortlessly with one hand operated in the necessary manner by placing your thumb on the stop cam on the adjustable Organ is pressed and at the same time the hand lever is grasped with the fist. That can also be done with thick gloves. Furthermore, the adjustable organ is designed as a leaf spring a pivot axis is dispensable and the assembly has been considerably simplified, which is advantageous in terms of price. Due to the elasticity of the leaf spring, the stop cam always returns back into its position, which limits the pivotability of the hand lever, when the brake is applied will.

Braking device for vehicles, in particular
for motorcycles, bicycles and mopeds

Applicant:

Karl Altenburger, Jestetten (Bad.)

Named as inventor:

Karl Altenburger, Jestetten (Bad.)

Claimed priority:

Switzerland of November 13, 1962 (13 337)

According to a further feature of the invention, the end part facing the bearing block has Leaf spring has a curved cross-section shape, which makes this end part rigid in a simple manner is made and the bending of the leaf spring that occurs when the stop cam is actuated is away from the stop cam by a predetermined distance.

In the drawing, an embodiment of the braking device is shown. It shows

Fig. 1 shows the braking device in side view, partly in longitudinal section, in the effective position of the Adjusting device,

F i g. 2 the braking device according to FIG. 1 in the inoperative position of the adjusting element,

F i g. 3 is a partial side view of the braking device according to FIG. 1 in the braking position of the hand lever,

F i g. 4 the leaf spring with the stop cam in a diagrammatic representation.

According to the embodiment shown, a bearing block 1 is fastened to the steering rod 3 of the vehicle by means of a pipe clamp 2. On an axle 4 , a curved, hollow hand lever 5 is pivotably mounted on the bearing block through its side walls 19, 20. The brake cable 7 is anchored with its nipple 8 on a hook 6 inserted in the hand lever 5. The sheath 9 of the cable 7 is supported on the bearing block 1 . The bearing block 1 is hollow, so that the hand lever 5 can be partially pivoted into the cavity 10 of the bearing block (FIG. 2).

The adjustable member 11 is designed as a leaf spring 12 on which a stop cam 13 is attached. The end part of the leaf spring 12 located in the vicinity of the stop cam 13, which is designed as a pin, has a curved shape in cross section.

709 677/7

Claims (2)

The lobes 14, 15 thus formed are approximately parallel to one another (FIG. 4). In the relaxed state, the leaf spring 12 has an essentially straight shape and has a slot 16 through which the hook 6 holding the nipple 8 can reach. In the back of the hand lever 5 there is a bore 17 for the pin 13 to pass through. The bearing block 1 has an edge 21 against which the pin 13 can strike (FIG. 2). The leaf spring 12 is pushed with its part facing away from the pin 13 into the interior 18 of the hand lever 5, while the part of the leaf spring 12 carrying the pin 13 is arranged in a freely resilient manner. When inserting the leaf spring 12 is bent according to the curved shape of the hand lever and thus pretensioned. The leaf spring is inserted into the hand lever until the pin 13 snaps into the bore 17 in the back of the hand lever, whereby the leaf spring is secured against sliding out. The spring 12 resting on the inside of the hollow hand lever 5 is guided with its tabs 14, 15 on the inside of the side walls 19, 20 of the hand lever 5. The pin 13 protrudes through the bore 17 to the outside and is freely accessible. The pin 13 can be moved in the bore 17 against the force of the pretensioned spring 12 by finger pressure. When the Bowden cable is ready for braking, the pin 13 rests against the edge 21 of the bearing block 1 (FIG. 1). If the hand lever 5 is to be pivoted even more in the sense of releasing the brake in order to be able to open the brake shoes even more during the assembly of the brake cable or to change a wheel, the pin 13 is pushed back so far into the interior of the hand lever that the Pin 13 reaches an ineffective position as a stop under the edge 21 of the bearing block and the lever 5 can be pivoted further into the cavity of the bearing block 1, whereby the brake shoes open further. From this position of the hand lever 5, too, the brake cable is fully effective; H. the brake can be operated; it only has to move the hand lever 5 through a larger angle than from the position according to FIG. 1 can be pivoted from opposite the bearing block in order to move into the braking position according to FIG. 3 to arrive. The invention also achieves the following advantages over known braking devices: It is possible to effortlessly actuate the adjustable member 12, 13 with the hand operating the hand lever in order to be able to further open the brake shoes from their standby position near the rim. When the brake is subsequently applied by means of the hand lever, the stop cam 13 of the adjustable member 12, 13 automatically returns to its operative position under the influence of the spring 12. The adjustable member formed by the leaf spring 12 and the pin 13 can be designed and assembled very easily and cheaply; no separate means for fastening to the hand lever 5 are necessary. The adjusting element essentially affects neither the shape nor the appearance of the bearing block and the hand lever. The usual shape of the hand lever 5 is used to fasten the organ and at the same time serves to pretension the spring 12. The leaf spring 12 lies within the hand lever; it does not disturb its functional, handy and aesthetic form. The spring 12 is maintenance-free and almost free of wear, since the spring can be made quite long in accordance with a conventional hand lever and is thus subjected to a slight elastic deformation both when it is installed in the hand lever and when the pin 13 is actuated. The invention is not limited to the embodiment described and illustrated. For example, the following possibility is conceivable: Should a straight hand lever be present in place of the curved hand lever 5, the leaf spring in the relaxed state is z. B. given a curved or wavy shape so that the spring is again held in the hollow handle with elastic deformation. Patent claims: 1. Braking device for vehicles, especially for motorcycles, bicycles and mopeds, with brake shoes acting on a wheel rim, which can be actuated with the help of a hand lever pivotably mounted on a bearing block via a flexible pulling element that can be longitudinally displaced in a casing against the influence of a return spring, and with a manually adjustable organ that normally forms a stop for the hand lever to limit its movement when the brake shoes are opened in a standby position, and can be brought into an inoperative position in order to be able to open the brake shoes even further for dismantling the wheel, characterized in that the adjustable member is designed as an elongated leaf spring (12 ) arranged inside the hand lever (5) , on the end part thereof facing the bearing block (1) a stop cam (13) which can be displaced in an opening (17) in the hand lever wall is attached. 2. Braking device according to claim 1, characterized in that the end part of the leaf spring (12) facing the bearing block (1 ) has an arched cross-section (14, 15) . Considered publications:
German patent specification No. 1 096 784. 1 sheet of drawings 709 677/7 10.67 © Bundesdruckerei Berlin