DE408544C - Forage cutting machine - Google Patents

Description

They are forage cutting machines with a blade fan that discharges the cut material known; here the cutting blades are housed in a housing and as a wind blade formed, which blow away the clippings. Meanwhile, the pressure of the Knife wheel blower too small for the goods to be carried away from him at greater distances could be. It has therefore been proposed that the cut material discharged after leaving the knife a wheel blower to supply powerful auxiliary fan and this blowing away the cut material to the required to transmit long distances.

However, this device has not proven itself, because chopped to a quick and heavy wear and tear, green fodder, but soon clogging and sinking of the auxiliary fan leads. One has therefore gone over to the cut material delivered by the forage cutting machine directly into the Introduce the pressure line of the auxiliary fan, which one below the with a corresponding Arranged outlet opening provided knife wheel blower. But this showed again the disadvantage that due to the prevailing in the pressure line of the auxiliary fan Overpressure prevents the crop from exiting the knife wheel blower. One helped in such a way that between the knife wheel fan and the pressure line of the Auxiliary fan switched on a cell drum, whose chambers one after the other the pressure line of the auxiliary blower against the knife wheel blower, but this facility is already too sensitive and expensive to enjoy greater popularity and use could.

According to the invention, all these disadvantages are eliminated in that the compressed air flow of the auxiliary blower is passed through the knife wheel blower. It falls in this way complicated, expensive and delicate Intermediate parts between the knife wheel and the auxiliary fan away. The latter can wear out or sink in does not occur, and still can be through the compressed air flow of the knife wheel blower amplifying compressed air flow of the auxiliary blower the cut material directly from the knife wheel blower to very large, arbitrary Blow away long distances.

In order to avoid air turbulence inside the knife wheel blower, the 'Compressed air duct of the auxiliary blower at the entrance to the knife wheel blower in such a way that the Entry speed of the compressed air un-! danger to the speed of rotation of the blade wheel blades is equivalent to.

In view of the large internal pressure now prevailing in the knife jar one must now ensure that the feed cutting machine feeds the material Feeding device in the event of insufficient filling or in the event that the machine, for. B. for cleaning, air empty is to be blown through, what is sealed against the escape of air can be achieved in many ways. Should be a completely airtight seal can not be achieved, it is advisable outside the machine in front of the feeding device to let open a suction line leading to the auxiliary fan, which sucks the escaping and dust-filled air and supplies to the auxiliary fan.

An embodiment of the subject matter of the invention is shown schematically in the drawing Representation illustrated, namely show

Fig. Ι a side view of the new forage cutting machine,

Fig. 2 a section along line AA of Fig. I,

Fig. 3 shows a detail of this section on a larger scale and

Fig. 4 shows another embodiment of this detail.

ι is the knife wheel housing with the connected Blow-out line 2; the cutting knives are denoted by 3, the wind blades attached to them by 4. 5 is the mouth hole the feeder drawer and 6 the auxiliary fan. According to the invention, the pressure line leads 7 of the auxiliary fan 5 directly into the knife wheel housing 1 and is on the Entry point expanded so that the entry speed of the compressed air approximately corresponds to the circumferential speed of the wind blades 3.

Figs. 3 and 4 show two different embodiments of the airtight seal the feeder for the clippings. 8 is the lower fixed feed roller, 9 the associated tooth plate and 10 the upper, up and down movable access

Claims (4)

Guide roller whose toothed plate ii participating in the upward and downward movement is guided in the height slot 12 of the housing wall. In the embodiment according to Fig. 3 (see. Also Fig. 2) there is an up and down movable slide 13 on the inside of the housing wall, which can be adjusted up and down by a lever mechanism 14, 15 and 16. The angle lever 15, 16 is mounted on the saddle 17 receiving the bearing of the roller 8, so that the slide 13 can be raised by the hand lever 16 until the mouth opening 5 is fully released, in this position the housing slot 12 is kept closed and on - And downward 1L movement of the roller 10 with the plate 11 participates. A locking bow 18 is firmly connected to the hand lever 16. In a section 19 of the same in the position of the individual parts shown in Fig. 3, i.e. when the slide 13 is raised, a locking pin 20 can intervene Spring shifts axially. The adjusting lever 21] can therefore only be engaged if the slide 13 has previously been moved into the upper position by means of the lever 16, i.e. has already released the mouth opening 5, while on the other hand the mouth opening 5 is closed again by the slide 13 \ only hot disengaged lever 21 is possible (see. Fig. 2). In the embodiment according to Fig. 4, the box-like part 22 of the upper roller 10 receiving saddle 17, which ceil 22 during the upward and downward movement of the roller 10 on the is used for the airtight closure of the housing slot 12. Outer wall of the knife wheel housing 1 slides. Furthermore, the front part 11 'of the upper tooth plate 11 is designed as a flap rotatable about a horizontal axis, which rests under its own weight on the lower tooth plate 9 and is automatically opened by the material pushed into the mouth hole 5. Any small amounts of air still escaping through the feed drawer, together with the dust carried along, are fed back to the auxiliary fan 6 through the suction line 2 ^ which opens freely above the feed drawer. '■ Pat KN t-An Proverbs: 1. Forage cutting machine with knife wheel blower discharging the clippings and an auxiliary fan serving to extend the go conveying path, thereby characterized in that the compressed air flow of the auxiliary fan (6) is passed through the blade fan (1 to 3) will. gg 2. Feed cutting machine according to claim i, characterized in that the compressed air line (7) of the auxiliary fan (6) widens on entry into the Messerradgebläse (1 to 3) such that the inlet ^ ₀ occurs speed of the pressurized air about the rotational speed of the knife blades ( 4) corresponds. 3. Device on forage cutting machines according to claim 1 for the airtight closure of the feed drawer for the cut material, characterized in that an adjustable along the wall of the knife wheel housing, in the low position the mouth hole (5) of the feed drawer for the cut material and in the high position the guide slot (12 ) in the knife wheel housing for the up and down movable upper part (11) of the feeder drawer covering slide (13) on the movement of this. The upper part (11) participates with its actuating tool (14, 15, 16) which in the lower position of the slide (13) to the material supply controlling the machine adjusting lever (21) locks in the Ausrücklage _go, so that a displacement of the slide from the Low to the high position only in the disengaged position of the adjusting lever (21) and its engagement is only possible in the high position of the slide. 4. Device on forage cutting machines according to claim 1 for the airtight closure of the feeder drawer for the cut material, characterized in that the up and down movable upper part (11) of the feeder drawer for the cut material with a slide (22) covering the guide slot (12) in the housing wall and is designed in its front part (11 ') as a flap rotatable about a horizontal axis, which rests under its own weight on the lower part (9) of the feeder drawer and is automatically lifted by the cutting material that is pushed in. n ₀ For this purpose ι sheet of drawings. Berlin, printed by RQCHs & nuCKEREi.