DE357289C - Friction buffers - Google Patents

Description

The invention relates to a friction buffer, which differs from known arrangements thereby distinguishes that the lengths of the • successively connected friction elements accordingly the pressure exerted on them are graduated in such a way that a uniform surface pressure is achieved.

Fig. Ι of the drawing represents the subject matter of the invention in longitudinal section, Fig. 2 ίο shows the schematic arrangement.

I by the pressure plate due to the spring force on the foremost Reibungselemte a pressure P is applied, the result is a result of the clamping angle α and the effective coefficient of friction φ a normal pressure in the friction segments N

ao if

Tg α + φ

ι -9tgft
tga + φ

is.

as the central pressure P 'on the second pressure plate is P + R', if R 'means the friction in the segments α .
Hence applies

P '= P + R'
N _x = P'c or

R '= (N + N ₁ ) φ = ₉ c (P + P')

= φ C (2 P + Bf).

From this it follows

I CpC

and the central pressure acting on the pressure plates e and f

ι - cpc

The friction in segments b

_{D // n /} 2cpC Ij ~ 9C 2 ψ C

ι - 9C ι - 9C I - 9C

and the central pressure acting on the pressure plates g and h, respectively

- ρ

or the friction in the segments d

ν "- P" ^{Z (pc} - p ( ^{1+ <pc} ) ^2. -1 ™ i-_ ₉ c ~ (i - q> c) ² '1-

One denotes the value

I -φ C

with k, it results in general

Since k is constant for the same angle α and the same coefficients of friction, this results in the ratio of the normal pressures in an unambiguous manner.

Since the limit of the performance of the friction buffer is now according to the maximum permissible specific surface pressure is determined, the specific surface pressure must be used if possible all friction segments be the same. The idea of the invention now consists in the lengths of the segments or their areas in relation to

graduate, which satisfies the above requirement and the cheapest possible Area occupancy is achieved.

Claims (1)

Patent claim: Friction buffers with several 8g in a row other rows of friction segments, characterized in that the lengths of the segment cylinders connected in series according to the pressure exerted on them in a certain ratio, and in such a way graded that a uniform Surface pressure is achieved. 1 sheet of drawings.