DE1782264A1 - Rotary mower - Google Patents

Description

Maschinenfabrik Fahr Aktiengesellsshaft, Gottmadingen

Rotary mower

The invention relates to a rotary mower with a plurality of rotary mowers which can be driven about vertical axes of rotation ·} * ,, which are arranged next to each other on a crossbeam, with the interposition of a tractor attachment device is connected to the tractor via two joints in a transverse to the direction of travel / vertical plane so that it can swing and can perform both translational and pivoting movements for the purpose of adapting to uneven ground, and one of the Includes tractor from driven drive shaft for the mower rotor.

In the case of rotary mowers of the type mentioned at the beginning, the trans-

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latorical and rotational evasive movement of the crossbar in the vertical plane is made possible by the fact that between the drive shaft for the mower rotors and the tractor drive located in the crossbar is a belt drive is switched on, the two axes of rotation lying in the direction of travel at the same time pivot axes for the crossbeam are.

This additional intermediate drive increases the manufacturing costs the machine and the effort for maintenance. The machine's susceptibility to failure is also increased affects the possibility of belt breakage.

The invention is therefore based on the object of the rotary mower design of the type mentioned so to develop further that, despite structural simplification, the disadvantages mentioned by eliminating the dual drive are avoided while maintaining the vertical mobility of the crossbeam.

The invention is essentially characterized in that the articulated crossbeams located in the

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borrowed drive shaft for the mower rotor with one on the inside End of the cross bar arranged angular gear is connected, its horizontal, lying in the direction of travel Input shaft can be coupled directly to a tractor PTO shaft

The characteristic

It has been found to be particularly useful here / after which the articulated crossbeam is connected to the tractor hitch by an arm, one end of which on the tractor attachment around a horizontal axis in the direction of travel and the other The end of the crossbeam is arranged freely rotatable about an axis lying parallel to this.

According to a different advantageous embodiment a carrier is mounted on the tractor attachment device so that it can be moved up and down in vertical guides and the crossbeam is attached to it this carrier is arranged to be pivotable about a horizontal axis lying in the direction of travel. It is particularly beneficial here, when the carrier consists of an axis that is both vertically displaceable in the vertical guides

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is arranged horizontally pivotable, since in this simple way a further decrease if necessary the transport width can be achieved.

The movement of the crossbeam in a vertical plane is expediently through between the tractor attachment device and crossbar switched spring elements, whose Spring force is adjustable, controllable in the sense of relieving the crossbeam,

Further details, advantages and features emerge from the following description and on the basis of FIG Drawings illustrating exemplary embodiments; show it:

Figures 1 and 2 are a corner view and a plan view, respectively

of part of a rotary mower, Fig. 3 is a rear view of another embodiment of the rotary mower and FIG. 4 is a rear view of a further exemplary embodiment according to the invention. The schematic drawing illustrates several implementations of a rotary mower, each with a crossbar 1, on the underside of several inähkreisel 2 with

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178226A

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■ cutting knife]! 3 are arranged. The mowing rotors 2 are drivable about vertical axes of rotation 4. In all versions there is a drive shaft 5 in the crossbeam 1, which is in drive connection with the mower rotors 2 via bevel gears 6. At the inner "end of the crossbar 1 is in each case an angular gear 7 is arranged, the input side üiit the usual articulated shaft 8 of the tractor and the output side is connected to the drive shaft 5.

In the first embodiment according to FIGS. 1 and 2, between the crossbeam 1 and one with the three-point linkage the tractor couplable device 9 is arranged an arm. The arm 10 is at one end to the Cross beam 1 and with its other end on the tractor hitch 9 hinged. The horizontal joint axes 11 and 12 are parallel to one another and in the direction of travel. When the mowing rotors 2 hit uneven ground, the transverse bar 1 can both around the hinge axis 12 and around the ^ steering axle 11 oscillate, which allows a particularly good adaptation to the ground conditions. The vertical movement

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movements of the crossbar in the area of the bevel gear 7 are compensated by changes in the length of the propeller shaft 8 in a known manner.

A strut 14 is hingedly attached to the top of the crossbeam 1. The other end of the strut 14 has an elongated hole 15 through which a bolt 16 of the tractor attachment device / is penetrated in a freely movable manner. The elongated hole 15 allows the pivoting movements of the crossbeam 1 required during work. When lifting of the tractor attachment device 9 for transferring the feschine into the transport position, the crossbeam 1 drops until the end of the elongated hole 15 strikes the bolt 16 and does not allow any further movement of the crossbar.

According to another embodiment according to Fig. In the drawing, the crossbeam 1 is connected to the tractor attachment device via a carrier 17. The carrier 17 is arranged in guides 18 of the tractor attachment device 9 so as to be vertically displaceable. On the carrier 17 is the Crossbeam 1 is attached rotatably about a hinge axis 19.

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The horizontal joint axis 19 lies in the direction of travel. This double-jointed arrangement - joint axis 19 and sliding joint 17, 18 - on the tractor attachment 9 is also a good alternative for the Impact of the mowing rotor 2 given on uneven ground.

By modifying the embodiment according to FIG. 3 in the sense that the carrier 17 is designed as an axis is, which rotate in the guides 18 in addition to their vertical displaceability also about their own axis can, it is possible to use the crossbeam 1 attached to the carrier 17 with the mowing rotors 2 to reduce the transport width to swivel in about 90 ° to the rear.

Fig. 4 finally shows an embodiment of the Invention in which the crossbeam 1 with the tractor attachment 9 is connected to a horizontal hinge axis 20 lying in the direction of travel. This connection of the crossbeam 1 with the tractor attachment device only allows a relative rotational movement. To the impeccable Adaptation to unevenness of the Eodenum is made in this case

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Execution therefore assumes that the three-point linkage of the tractor to which the tractor attachment device 9 is connected is in the free-running position and also allows translatory vertical movements of the entire rotary mower

To control the vertical movement of the crossbeam 1, there is a position between the crossbeam 1 and the tractor attachment device 9 an adjustable compression spring 21 connected, which counteracts the weight of the crossbar 1 and the mower rotor 2.

The inventive arrangement of the cross beam 1 on the tractor attachment device is the drive the mower rotor 2 simplified. The intermediate drive required in the known rotary mowers can be omitted. The possibility of customization the mower rotor on uneven ground is given to a large extent.

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Claims (6)

Patent claims: 1./ Rotary mower with several, approximately vertical axes of rotation Drivable Mähkreisel ^ which are arranged side by side on a crossbar, with the interposition of a The tractor attachment device is connected to the tractor via two joints in a vertical plane transverse to the direction of travel and for the purpose of adapting to uneven ground can perform both translatory and pivoting movements, and the one driven by the tractor Contains drive shaft for the mower rotor, characterized in that in the articulated crossbar (1) Located drive shaft (5) for the mower rotor (2) with an angular gear arranged at the inner end of the crossbar (1) (7) is in connection, the horizontal input shaft lying in the direction of travel directly with a The tractor PTO shaft (8) can be coupled. 2. Rotary mower according to claim 1, characterized in that that the articulated crossbeam (D with the -10-209821 / 0133 - ίο - The tractor attachment device (9) is connected by an arm (10), one of which is bathed on the tractor attachment device (9) around a horizontal axis (12) lying in the direction of travel and its other end on the crossbeam (1) is arranged freely rotatable about an Aöhsö (11) lying parallel to it. 3. Rotary mower according to claim 1, characterized in that a on the tractor attachment device (9) The carrier (17) is mounted so that it can be moved up and down in vertical guides (18) and the crossbar (1) is mounted on the carrier (17) is arranged pivotably about a horizontal axis (19) lying in the direction of travel. 4. Rotary mower according to Claim 3, characterized in that that the carrier (17) consists of an axis in the vertical guides (18) both vertically is arranged displaceably as well as rotatable about its own axis. 5. Rotary mower according to claim 1, characterized -11- 209821/0133 shows that the crossbeam (1) with the tractor attachment (9) the three-point linkage of the tractor that is in the free position with respect to the tractor is attached, via a pivoting of the crossbar (1) permitting horizontal G-joint axis lying in the direction of travel (20) is connected. 6. Rotary mower according to one of claims 1 to 5, characterized in that between the tractor attachment device (9) and crossbar (1) adjustable in their spring force, the pressure with which the mower rotor is on the ground support, reducing spring elements (21) are switched on. 209821/0133