DE271713C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

GREAT. 45 ». GROUP

Patented in the German Empire on March 12, 1913.

One has already seen how with motorized vehicles, which have to drive a lot on soft ground z. B. the towing carriages for plows and other agricultural machines, from the engine driven drive chains used, which are provided with spade-like grippers that are pressed into the ground when the chains revolve and thereby a enable safe movement of the car.

According to the invention, the spade used to drive the towing vehicle should now be used be moved by a drive pulley, which can be moved radially in guide slots Sliders are provided in which the drive spades are articulated.

The drive spades are on each side with an arm protruding forwards or backwards rigidly connected, which appropriately engage with rollers in circular guides. The circular guides are the length of the with the Arms connected to the drive spade are offset against the axis of the drive pulley, so that they are rigid with the rotation of the drive pulley by imparting the Arms connected to the drive spade keep the spade in the vertical position. The centers of the circular guides are in addition to both sides also in the Height direction offset from the axis of the drive pulley, whereby it is achieved that the arc, which the hinge points of the spade are below, through the drive axle laid horizontal plane is traversed, is flattened. But for the drive comes only this part of the path traversed by the drive spade is taken into account, since only in this part of the movement the drive spades · engage in the ground.

The eccentricity of the centers of the circular guides against the axis of the drive pulley in the height direction is now expediently chosen so that in the case of the drive Considerable part of the movement the pivot points of the drive spades with the same angular rotations of the drive pulley obtained approximately the same horizontal displacements in all parts of the path. This is important for the removal of the drive spades that have been pressed into the roadway from each other always remains the same. Would be the pivot points of the drive spade around an arc of a circle in the part of their movement that is considered for the drive describe the axis of the drive pulley, so would the distance between the individual Drive spades must be changed after entering the roadway, as the Projection of the quadrant of the circular path on the roadway is smaller than the circular path quadrant self.

An exemplary embodiment of the subject matter of the invention is shown in the drawing.

Fig. Ι illustrates the drive in vertical section along line AB in Fig. 2 and 3;

Fig. 2 is a section along line CD in Fig. 1 and 3;

Claims (3)

Fig. 3 is a section along line E-F in Fig. 1 and 2; FIG. 4 schematically illustrates the various parts in the same position as in FIG. 1, but with the second circular guide being drawn in; FIG. Fig. 5 shows a schematic representation of the path which the articulation points of the drive spades cover with respect to the roadway and in the radial guides of the drive pulley. The drive takes place from the shaft α, which carries a drive pulley b. The disk b has radial guides b1 in which sliders c can be moved. The drive spades ä are articulated in the sliders c. The spades d carry arms f1 and f% rigidly connected to them, which are directed to opposite sides and engage with rollers f3 and fl in fixed circular guides g1 and g2. The circular guides g1 and g2 are arranged eccentrically to the shaft α of the drive pulley b that their center points g3 and g4 are laterally offset by the length of the arms f1 and f2 with respect to the axis of rotation (see FIG. 4). In addition, the pivot points g3 and g4 are also higher than the axis of rotation of the drive pulley. When the axis α is driven with the aid of the chain wheels a1, the rollers f3 and fider arms f1 and f2 slide in the guides g1 and g2, with the sliders c moving in the radial direction due to the eccentricity of the guides g1 and g2 against the axis of rotation a in the vertical direction move in the guides b1 of the disc b. The drive spades d, which are rigidly connected to the arms f1 and f2 of the sliding rollers fs and fi, are always kept in the vertical position during this movement. As a result of the displacement of the sliding pieces c carrying the hinge points of the spade d in the guides b, the hinge points of the drive spades do not describe an arc around the drive axis a, but rather an arc around the one at the level of the center points g3, g4 of the circular guides g1 and g2 in the middle lying point h (see Fig. 5). Of the entire movement of the hinge points of the drive spade on the circle drawn around point h, only the part below the horizontal plane laid by the axis of rotation α is considered for driving the carriage through the spade. Compared to the circular arc struck around point h, however, due to the eccentric position of point h in relation to axis of rotation α, the arc through which the hinge points of the drive spade pass in this part of the movement is sharply flattened. As shown in FIG. 5, the pivot points of the drive spades pass through the arches I, II, III, which is achieved by the radial displacement of the sliders c in the guides b1 of the drive pulley. If such a shift did not take place, the points of articulation of the drive spades would have to pass through the circular arc I, IV, III drawn around the point α below the horizontal plane laid down by the axis of rotation α. Since the path I, II, III is almost exactly an arc around the center point h, the guides g1 and g2 for the sliding rollers f3 and f * can be designed as circles, which is important for easy production. With the same angular rotations of the drive pulley around the axis of rotation a, which are designated with the numbers 1, 2, 3, 4, 5, 6 on the circular arc I, IV, III, the hinge points of the drive spades move on the circular arc I, II, III from I to 1 ', 2', 3 ', II 4', 5 ', 6' and III. With this movement of the hinge points of the drive spade the hinge points experience the same horizontal displacements with the same angular rotations, namely if one wants to disregard the extreme angular rotations from I to 1 and 6 to III, which are hardly possible for the engagement of the spade in the ground from 1+ to 2+, 3+, a 4+, 5+ and 6+. The distances between 1+, 2+, 3+ etc. are all almost the same, which means that after the spades have penetrated the ground, the distance between the spades is no longer changed as long as they are in the ground. This of course makes the drive much easier than a drive in which a radial displacement of the hinge points of the drive spades against the drive axis would not take place and therefore the hinge points, while the spades are in the ground, the positions 1, 2, 3, IV , 4, 5, 6 would have to go through. Godfather NT-A ν Proverbs: 1. Spade drive wheel for motor vehicles, mainly for moving agricultural vehicles Machines (plowing, etc.), characterized in that the drive spades from a drive pulley o. be moved by means of radially displaceable sliders in guide slots and with protruding on both sides Arms are rigidly connected, which are guided by circular guides so that the spade always the vertical position maintained. 2. Spade drive according to claim 1, characterized in that the pivot points the circular guides the length of the arms corresponding to both sides and also upwards against the axis of the Drive pulley are offset so that the arc which the pivot points of the spade is below the through the drive axle laid horizontal plane is traversed, is flattened. 3. Spade drive according to claim 1, characterized in that the eccentricity the circular guides against the drive axis in the vertical direction is chosen so that below that through the axis The horizontal plane placed on the drive pulley is the joint points of the drive spades with the same angular rotations of the drive pulley in all parts of the path approximately get the same horizontal displacements. 1 sheet of drawings.