JPH022983Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a brake band for a band brake, in which the brake lining is pressed against the brake drum when the brake is activated, but even if the brake lining is deformed, other brake parts will be adversely affected. Improvements have been made to prevent this from occurring.

The brake band to which the brake lining is attached may cause misalignment between the brake band and the brake lining, and at the same time, the brake lining may bulge in the left-right direction from the left and right sides of the brake.

To explain a conventionally known brake band as shown in FIGS. 1 to 3, FIG. 1 is a cross-sectional view of the brake band, in which a part of the brake band 31 is a protrusion 41,
The brake lining 21 is fixed with a rivet 51, and FIG. 2 shows the brake lining 21 moving while being pressed by the rivet 51 and the protrusion 41 when the brake is applied.
The figure is a plan view showing a state in which the brake lining 21 bulges in the left-right direction from the left and right sides of the brake band 31 when the brake is applied, and these bulges may come into contact with other brake parts, resulting in an unexpected situation. This was often the case.

The present invention has been proposed to solve these drawbacks, and will be explained in detail below according to the drawings. As shown in FIG. The brake lining 2 has arrow-like or concave grooves arranged at equal intervals with curved parts located toward the sliding force generation direction of the brake lining 2 on the line, and when the brake is applied, the brake lining 2 presses against the brake drum 1. This causes a braking effect, but at this time the brake lining 2 is misaligned with the brake 3 to which it is attached.

This is because the brake lining 2 is in contact with the brake drum 1, so a tensile force is exerted thereon, and on the other hand, a force in the opposite direction is exerted on the brake band 3.

In order to prevent this slippage, it is effective to ensure that the brake lining and brake band are firmly fixed, but for this purpose, protrusions are formed on the brake band, and holes are formed in the brake lining to fit the protrusions. A method of combining the two and bringing them into close contact has been proposed.

However, even in this case, it is not possible to maintain the brake lining and brake band in complete contact with each other,
When the brake is operated, the brake lining may bulge to the left and right at the joint between the protrusion and the hole, but this bulge could not be prevented.

This means that in the current situation where band brakes are lightweight and compact, the bulging part comes into contact with other parts, impairing the band brake's function, especially if it comes into contact with the brake drum while riding the bicycle. This may impede safe bicycle riding.

In this regard, in the present invention, the brake lining 2 is configured so that it does not bulge out in the left-right direction even when the brake is pressed when the brake is activated, and is gathered near the center of the brake band 3. No such situation will occur.

In other words, brake lining 2 of brake band 3
Since a fletching or concave groove is formed on the contact surface with the brake drum 1, when the brake lining 2 is pressed against the brake drum 1, it is pulled along the groove, causing stress to cause the brake lining to move from side to side. It will not bulge out.

Moreover, since the curved portions of the grooves are located on the longitudinal imaginary center line of the brake body 3 in the direction in which the slippage of the brake lining 2 occurs, the curved portions of the grooves are forcibly concentrated on the imaginary center lines C, D, and E. The brake lining 2 is then stretched.

In addition, since it does not bulge out laterally and tends to protrude upward, the braking effect is excellent.

The shapes of the grooves include a concave groove 4 as shown in Fig. 4, an arrow-shaped groove 5 as shown in Fig. 6, and a mutually shifted deformation as shown in Fig. 7. It goes without saying that the groove portion 6 may be formed in the shape of an arrowhead to achieve the same effect.

Needless to say, the reason why the brake lining 2 deforms when pressed as described above is because the material thereof is flexible, pliable, and stretchable.

As described above, the present invention provides a brake band for a band brake that regulates the brake lining to properly press the brake drum without causing deformation that would adversely affect other parts when the brake is applied. We are now able to offer this.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventionally known brake band.
FIG. 2 is a cross-sectional view of the known brake band when the brake is operated. FIG. 3 is a plan view of a known example when the brake is activated. FIG. 4 is a plan view of an embodiment of the present invention.
FIG. 5 is a sectional view taken from A to A in FIG. 4. Figure 6,
FIG. 7 is a plan view showing another embodiment of the brake band.
FIG. 8 is an enlarged sectional view taken from B to B in FIG. 7. FIG. 9 is a plan view of the entire band brake. In the figure, 1: brake drum, 2: brake lining, 3: brake band, 4: groove, 5: groove,
6: groove, 7: rivet, 21: brake lining, 31: brake band, 41: protrusion, 51: rivet, C, D, E: aerial center line.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) On the mounting surface of the brake band to which the brake lining is attached, fletching or concave grooves are arranged at equal intervals on the longitudinal imaginary center line toward the direction in which the sliding force of the brake lining is generated. A brake band for a band brake characterized by the following: (2) The brake band for a band brake according to claim 1, wherein each piece of the fletched groove is separated to form fletched grooves that are offset from each other.