Bicycle brake "Go-Brake"

Description

Brake for bicycles with adjustable distance between the brake shoes and the wheel rim in the rest position.

The so-called V-Brake is the most widely used brake on bicycles. In this rim brake the two brake arms, including brake shoes, are mount on frame parts (brake base). The brake bases are firmly connected to the frame of the bicycle and are de facto standardized. When the brake lever on the bicycle handlebar is released after braking, the brake shoes on both sides of the wheel rim in the ideal case move back the same distance. If they do not, the brake is not properly centered. In extreme cases, a brake shoe remains in contact with the wheel rim and rubs on it, even if the brake is not being actuated. Even if the brake has been properly adjusted (centered), the brake arms may be skewed under certain circumstances. This happens especially when water or dirt penetrates between the moving and fixed parts of the brake. Every cyclist who rides a lot knows this deficiency. In addition, it sometimes happens that under very strong braking, a brake shoe remains in contact with the wheel rim after releasing the brake lever while with weak to moderate braking all remains in order.

A change in construction as shown in the sketch of Fig. 0 solves the problem.

In order to always have equal distance between brake shoes and the wheel rim when the brake is not actuated, the return travel of the brake arms is limited instead of the usual setting of the return spring force. In this case it is not decisive which force the return springs develop. If the brake is not actuated, the return spring pushes the brake arm to a limit. As a result, the distance between the brake shoe and wheel rim remains constant in the rest position of the brake.

As shown in FIGS. 1 and 2, the brake can be constructed in such way that the distance between the brake shoe (1) and the wheel rim (2) can be adjusted in the rest position, with one adjusting element (4) attached to the attachment element (13), which presses against the brake shoe holder (14). The adjusting element (4) is fixed with a lock nut (15). This setting is also easier than the adjustment by changing the spring force, as is customary in the V-Brake. The procedure is as follows: The adjusting elements (4) are screwed in until the brake shoes (1) touch the wheel rim (2). Then undo both adjusting elements (4) with the same number of revolutions again. Then it is to check whether the wheel is running freely, so that the brake shoes (1) do not touch the wheel rim (2).

When adjusting the brake, it is necessary to adjust the tension of the pull rope (9) in the rest position of the brake. For this purpose, a hollow screw (7) with a fixing nut (8) at the upper end of a brake arm (6) are mounted, as it is already often used on brake levers in bicycles.

The diameter of the locking pin (12) may be only slightly smaller than the diameter of the corresponding locking hole in the frame part (11), so that the spring block (3) cannot rotate even slightly, otherwise the exact adjustment and compliance with the distances between the brake shoe (1 ) and wheel rim (2) is not guaranteed. A chamfer on the locking pin (12) is used to facilitate the mounting of the brake on the bike.

A wheel change is made easy in this design: The screw (10) is to remove and the brake arm (6) to take off.


Because the described brake is constructively oriented to the most commonly used design, the adaptation of the existing manufacturing process does not require much expenditure to implement the invention.

Fig. 1

Fig. 2

LIST OF REFERENCE NUMBERS

1. Brake shoe

2. Wheel rim

3. Spring block

4. Adjustment element

5. Return spring

6. Brake arm

7. Banjo bolt

8. Fixing nut

9. Pull rope

10. Screw

11. Frame part

12. Locking pin

13. Neck element

14. Brake shoe holder

15. Locknut

16. Frame

In 2015, a prototype of the brake was manufactured and mounted on a bicycle. To this day, post is daily delivered with this bicycle in rural hilly area, with an annual mileage of about 6000 km. The "Go-Brake" has proven to be reliable and required low maintenance.


Here is a picture of it:

We are looking for a producer for the "Go-Brake"!

Imprint: Andrej Dik, Schumanstr. 24, D-33142 Bueren. dikandrej@gmail.com