US2230325A - Machine for treating, especially for washing sand, gravel, stone, and similar material - Google Patents

Description

Feb. 4, 1941. HAVER 2,230,325

r F. MACHINE FOR TREATING, ESPECIALLY FOR WASHING SAND, GRAVEL, STONE AND SIMILAR MATERIAL Filed Jan. 30, 1939 Patented Feb. 4, 1941 UNITED STATES PATENT FFIE' WASHING SAND, GRAVEL, STONE, SIMILAR MATERIAL AND Fritz Havel, Oelde, Westphalia, Germany Application January 30, 1939, Serial No. 253,653 In Germany February 3, 1938 2 Claims.

The invention relates to a driving device for a machine for treating, especially for washing, grinding and mixing, sand, gravel, stone and similar material, with trough-shaped or tubular 5 members that swing in the transverse plane in circuit paths.

According to German specification 628,551, there is known a machine that possesses a member which swings in the transverse plane and in the case of which the material to be treated is admitted into one or more troughs, which impart a helical forward movement to the material during the swinging. In this way, it has become possible to work in continuous operation, since the material, which is supplied to one end of the trough, automatically makes for the outlet.

However, machines according to German specification 628,551 are limited as regards their working length. This working length corresponds approximately to the distance between the right-hand and left-hand bearings I6 which are connected with each other by the shaft I. This shaft rotates freely between the two bearings and has a certain deflection on account of its great speed and load. This deflection exerts oblique pressures on the roller bearing I6 and should not be greater than is allowed by the tolerances of the bearing. Consequently, in the case of swinging machines, the distance between the two bearings cannot, according to experience, be greater than about 2000 mms. In the case of the known swinging screens, which are equipped with the same drive as is the machine according to German specification 628,551, this limitation is not so noticeable, since the bearings limit the working width, whilst the working length should, without danger, amount to three to six times the working width. However, the machine according to German specification 628,551 has, as its working length, only the measurement of the distance between the side walls it).

According to the invention, the limitation of the working length is removed by reason of the fact that the working machines, which mostly consist of a trough or a tubular member, are provided with two head bearings which work independently of each other and which are made to swing by means of eccentrics or by means of flywheels.

The invention is illustrated by way of example by the accompanying drawing.

Figure 1 shows a machine according to the invention in front elevation. The trough II has, on the right and left, bearings l6 respectively each of which has a piece of shaft l5 borne in two external bearings I 4 which are carried by the frame H2. The shaft, which is provided with eccentrics, carries, between the bearings, a flywheel which is adjusted to the swinging mass. 5 The trough is supported throughout its whole length by elastic means-e. g., helical springs l8.

Figure 2 shows the plan of the same machine.

According to Figure 3, the elastic means l8 can be fitted above and below the trough.

Figure 4 shows the construction of a head hearing in its details. The shaft I5 is located, with the ball head 38 and the bearings 16, in the end wall lb of the trough. The shaft is supported on the outside on the frames l2 and I2 in the bear- 15 ings l4 and it. The flywheel I! is, with its adjustable weight til, located between inside and outside bearings. The shaft receives its movement of rotation from the driving pulley 4| which may be in the form of a smooth or wedge-grooved pulley and, for the purpose of improving the output, may be in the form of a flywheel. If the machine is .to be swung only by inertia masses, the bearing construction is simplified in the known manner. Instead of the ball head, any 25 other bearing-e. g., a roller bearing with selfadjustment or an elastic bearing-can be employed.

In order to compel equal circular swings or 30 equal swings that are similar to circles, the two head bearings must be entirely equal. The two bearings are driven either through a shaft with equal driving pulleys which is located on the outside of the machine or by means of two like elec- 35 tromotors, which can be started equally advantageously from one position. The driving means have not been represented.

On starting the machine, it is first of all found that every bearing side swings the machine independentlyi. e., the circle of swing on the right leads the circle on the left or conversely. In this way, a point movement is produced in the centre of the machine. This is represented in Figure 5. The points a lie opposite each other on the right 45 and left. The same is the case with regard to the points b. Consequently, the machine will not perform any circular swings at 0. However, after some time, the circles of swing are mutually equal to each other. The machine runs exactly as if 50 the two hearings were connected with each other by means of a rigid shaft. This is represented in Figure 6. This operation is explained by the fact that the swinging machine stores up so much of its own energy that it can be regarded as an in- 55 dependent source of production of the swings. By means of the drive at the two ends, only as much energy is supplied to it as it requires for keeping the swings constant. In this way, the small energy requirement of elastically supported swinging bodies is explained in the known manner. One drive of the machine can even be temporarily disconnected without at once causing trouble. The circle of swing, however, diminishes gradually on the undriven side and also remains behind in its velocity. The machine may also be swung only at one end .eccentrically or by means of inertia masses and the opposite end may be mounted centrically. In that case, a swinging as shown in Figure 7 would result.

By means of the invention, it has become possible to give gutters for swinging washers, drums for swinging mills, coolers etc., a working length that is a multiple of the working length disclosed by German specification 628,551.

What I claim is:

1. A machine for treating, such as washing, sand, gravel, rock and similar material, comprising a trough-shaped member, bearings on said member, aligned driving shafts for said member journaled in said bearing and said bearings being eccentrically positioned with respect to the rotating axes of said shafts and separated and movable independently of one another so that said member may swing circularly in a transverse plane.

2. A machine for treating, such as Washing, sand, gravel, rock and similar material, comprising a trough-shaped member, spaced bearings connected to the end walls of said trough-shaped member, driving shafts for said member journaled in said bearings, and a universal joint between said bearings and said shafts, said universal I joints being eccentric with respect to the rotating axes of said shaftslso that said member may 20 swing circularly in a transverse plane.

FRITZ HAVER.

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