DE424077C - Drive for free-swinging plansifters with flyweights rotating radially around a pin - Google Patents

Description

GERMAN EMPIRE

ISSUE AI
JANUARY 18, 1926

REICH PATENT OFFICE

PATENT LETTERING

- JVl 424077 CLASS 5Od GROUP

(W 66060 Illisod)

Folkert Wiegmann in Frankfurt a. M.

Drive for free-swinging plansifters with radial circumferentials around a pin

Swing weights.

Patented in the German Empire on April 30, 1924.

The swing weights of the well-known free-swinging plansifter drives, which the The screen frame and carrier are either fixed on the screen and swing in a circular motion Plansifter shaft arranged or in two parts around the shaft around the center or rotatably mounted on rotating parts outside the center. Furthermore are types are also known in which they are suspended in a pendulous manner or can be displaced by springs are stored.

In the first-mentioned version, a bending moment arises in the shaft; at the other types of construction can have the effect

of the weights do not switch off completely. Therefore, in these cases, one must always be overweight be available to swing the weights. The excess weight works but jamming on the bearing body when starting.

In the case of plansifters with swinging swing weights, this is lowering the pendulum weights uncomfortable.

ίο The present invention is intended to all these evils can be avoided.

The swing weight is divided into two parts, which are indirectly articulated on the Attack the drive shaft and always set it to the oscillating movement of the sieves are. The weights are carried by the shaft during operation of the sifter, while at a slackening of the rotation and at a standstill each weight of a circular path is supported, which are attached to the screen body or to its carrier. the Weights only need to be lowered and raised a few inches so that they are little Take up space and can be installed well protected against accidents.

The invention is not changed by the fact that the swing weights continuously from the Circular path are borne or that the articulated movement is achieved by springs.

Due to the mobility of the weights, the bearing is not clamped, nor can any Bending of the shaft take place.

The drawing shows two embodiments of the invention on plansifters different drive.

According to Fig. 1, the freely designed visible frame body α is suspended from the rods b in a pendulum fashion. It is driven by the pulley r and the shaft w from above, but it can just as well be from below. The rotation of the shaft w is transmitted to the crank pin d by means of the crank c. The weights m are attached to the cranks through the rods η and the joints /. Circular paths e are attached to the sieve frame body α , on which the weights tn decrease when the speed decreases, so that they are carried by them when the sifter is at a standstill.

In special cases, if, for. B. as in the case of the sifter shown in Fig. 2, the drive is to take place by guide rollers and pulley on the crank pin d, the weights are alternately carried either directly by the crank pin d or by the circular path e .

Claims (1)

Patent claim: Drive for free-swinging plansifters with radial circumferentials around a pin Swingweights, characterized in that the weights that are known per se Way articulated to the crank or indirectly to the shaft, so that they are when starting the plansifter increase after exceeding a certain revolution and carried by the shaft are supported when stopping and in the rest position by special circular paths arranged on the screen body which prevents bending moments from being transmitted to the shaft and from jamming in the bearing. Abbr i. Fig. 2.