DE268537C - - Google Patents

Description

GERMAN EMPIRE

REICH SPATENT OFFICE

PATENT LETTERING

- M 268537 - CLASS 81 e. GROUP

GEBR. HINSELMANN in ESSEN, Ruhr.

and lower roller track.

Patented in the German Empire on November 19, 1912.

When operating the chute slides it is particularly important to achieve, solitary or even increasing promotion usual, tfie slide to lift sharply in one operation, so that it is automatic in the second operation can fall back. With the known suspension in pendulums, this is done on one side Raising achieved from the central position, while supported by rolling elements

From slipping wedge-shaped or curved, ascending. Rolling tracks for use reach. It has also already proposed rolling elements, the upper and lower tracks are designed as circular arcs around different center points, or one has used rotatably mounted rolling elements that have roughly the shape of the known clamping pawls.

The last-mentioned devices in particular have the deficiency that the possibility of lifting the slide, which is given in the eccentricity, cannot be fully utilized, since this naturally includes a rotary movement through 180 °. However, as can be seen from the arrangement of such a rolling element shown in FIG. 1, this only allows an oscillation of about 90 °, since the rolling element rests firmly against the slide as it moves further. It is also not possible to achieve the desired lifting height simply by increasing the eccentricity, for example for a smaller angle of rotation. The fact that the overall height of the slides is to be kept as low as possible stands in the way of this. The second, more important objection, however, is that if the eccentricity is too great, the rolling elements can easily slip. If Q is the force loading the rolling elements and t is the eccentricity, then according to Fig. Χ a torque

exercised on the rolling elements, the only by the. Friction Q μ on the upper and lower roller tracks can be resisted. The moment of friction is then

M ₁ - = 2 Q μ

where k is the distance between the points of contact. So the boundary condition is:

Assuming μ to be ^ -, we get

j _ii

~~ io

55

So the case highlighted in Fig. 1 already represents the borderline case.

The invention removes this limitation by making the eccentric to each other arranged rolling surfaces of the support body do not lie in the same plane, but be laid next to each other in different levels, so that mutual obstruction completely omitted.

Since the rolling elements are always connected in pairs

and this couple for practical reasons through a joint Axis is connected to a whole, so is by this laying, the bearing pressures eliminates the tilting moment that would otherwise occur in two different levels. the Oscillating movement of the rolling element can be extended arbitrarily over 90 ° without the mutual obstruction of the upper and lower rolling element entry. This juxtaposition the rolling element also has a special value for machining, namely now also the rolling arc with the smaller curvature can best be made by turning, like this with the rolling element shown in Fig. 1 is not possible.

In the drawing is an exemplary embodiment of the identified subject matter of the invention in Fig. 2 · in longitudinal section and in Fig. 3 shown in cross section.

On the chute α of the. now mostly usual cross-section are attached the 'rolling tracks b , which have the known shape

have inclined planes or rising curves. These tracks δ rest on the rolling elements c, which sirrd connected by a common axis d. The outer, eccentrically mounted rolling elements e , which run in rolling tracks / of the frame g, are connected to these inner rolling elements c. The shape of these tracks is basically arbitrary.

When the slide α is moved, not only does the rising roller paths b and f lift the slide, but also a rotation of the eccentric roller e, and there is no restriction here with regard to the full utilization of the eccentricity.

By, as shown in the drawing, inside the rolling elements with the smaller and out placing the rolling elements with the larger radius of curvature, can install one with no practical increase in the overall height of the chute b the rolling tracks a'm bottom of the slide, instead of, as this was previously common on their side flanges. The protruding edges of the rolling elements e can move freely in the space given by the usual cross-section of the chutes without being in any way disruptive. At the same time, the flange-like protrusion causes the rolling elements that are coupled to one another to be guided.

The arrangement also has the advantage that there is no extraordinary installation Care is necessary, as the rolling elements are always alone in the correct end position work towards; this is of the utmost importance for underground use.

Claims (2)

Patent Claims: 1. Rolling elements for shaking chutes with eccentrically arranged, upper and lower rolling track, characterized in that the two tracks are not in the same plane, but are laterally offset from one another in such a way that a mutual ⁴ hindrance in the rotation of the rolling element occurring with the rolling is not entry. : 2. rolling elements for vibrating chutes according to claim 1, characterized in that , the rolling elements (c) with a smaller radius of curvature are arranged on the inside and work together with the tracks (b) provided on the bottom of the slide (a) , while the rolling elements (e) with a larger radius lie on the outside and so freely in the through work the curvature of the slide edges given space. 1 sheet of drawings.