DE8811010U1 - Rotary haymaker - Google Patents

Description

The invention relates to a rotary tedder such as a rotary swather according to the generic term of the main claim. Rotary tedders of this type are known, for example, from German patent specification 32 23 768. The two-wheeled chassis of such machines serves to support them in the operating position against the ground and to guide the working tools at a uniform, small distance over the ground. When one of the running wheels runs over a local unevenness in the ground, its vertical movement is transferred to the working tools located to the side of it. These are lifted off the ground more than the unevenness in the ground would suggest. When driving through a trough, the opposite effect occurs and the working tools penetrate the ground.

The aim of this invention is to avoid this disadvantage of poor ground adaptation and to guide the machine smoothly and thus smoothly over uneven ground even at high driving speeds.

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This aim is achieved by the fact that the chassis of the rotary haymaker has four wheels, two of which are mounted on a double swing arm that swings around an axis that is horizontal and transverse to the direction of travel. If, for example, a front wheel rolls over a local unevenness in the ground, then one ^{half of} the chassis is only raised by about half the amount of the unevenness in the ground. Since, as with the known machines, the working tools are raised about twice as high as one half of the chassis, the tips of the working tools now follow an unevenness in the ground almost exactly.

Claims 1-4 claim particularly advantageous embodiments in terms of space and cost.

When cornering, wheels that are rigidly arranged at different distances from the swivel axis of the machine must inevitably slip to the ground. Particularly with a short machine frame, it can therefore be useful to design two of the running wheels as trailing wheels. If all four running wheels can trail, they can also be used on a machine that is rigidly connected to a tractor without losing their other advantages.

Claim 8 claims an embodiment which is particularly advantageous for road transport.

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Two performance examples are described below and explained by four figures.

Fig. 1: shows a rotary haymaker from the side, Fig. 2: shows the same object from above, Fig. 3: shows another design for the chassis of a rotary haymaker from the side, Fig. 4: the same object from above.

A frame (4) of a rotary tedder is pivotally connected to a three-point frame (1) around a vertical axis (2) and a horizontal axis (3). A support axle (6) leads downwards from a gear housing (5). A working rotor is mounted on it so that it can rotate and be driven, and consists of a plate (7), tine arms (8) and rake tines (9).

A wheel carrier (11) is fixed to the lower end of the support axle (6) and receives a horizontal swivel axle (11) at its free end. Z-shaped rockers (12) are pivotally mounted on the swivel axle (11), which in turn are rigidly connected to one another by a cross brace (13). The rockers (12) have horizontal bearing bolts (14) at their free end. A pressure rod (15) acts on the cross brace (13), which passes through the support axle (6) and which can be moved up or down by means (not shown) for adjusting the height of the machine.

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Double rockers (16) are pivotally mounted on the bearing bolts (14). They have inward-facing axle pins (17) at their front end and outward-facing axle pins (18) at their rear end. Wheels (19) are mounted on them. The deflection of the double rockers (16) is limited by stops (23) which are firmly connected to the rockers (12).

In another embodiment (Fig. 3 and 4), the double rockers (20) are equipped to accommodate one rigid impeller (19) and one trailing wheel (19, 22).

The inclined double rockers (20) mounted on bearing bolts (14) have axle pins (18) at their rear end on which wheels (19) are mounted. At their front end they have a head bearing (21) with a vertical hole. The head bearings (21) are penetrated by a curved trailing axle (22), which in turn carries a wheel (19) on a horizontal end.

For operation, the rockers (12) and with them the double rockers (16, 20) are lowered with ¹ " of the pressure rod (15) so far that the ends of the rake tines (9) rotate close to the ground. If one of the running wheels (19> runs over an uneven ground, the corresponding double rocker (16, 20) is raised and the corresponding horizontal bearing pin (14) is raised:

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by about half the height of the uneven ground. Since the rake teeth (9) are located outside the wheel track, they are raised by about the amount of the uneven ground and thus maintain their relative distance from the ground.

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Claims (8)

CLÄAS SÄÜLGAÜ GMBH Saulgau, PG 1436 C H E A N IZ P R D 1. Rotary haymaker such as rotary swather with at least one working tool rotating around an approximately vertical axis and a chassis arranged underneath, characterized in that the chassis has four running wheels (19), two of which are arranged on a double swing arm (16, 20) which is mounted so as to swing around an axis (14) lying horizontally and transversely to the direction of travel. 2. Rotary tedder according to claim 1, characterized in that one of the running wheels (19) is arranged on the inside and one on the outside of a double rocker (16). 3. Rotary tedder according to claim 2, characterized in that the front wheels (19) in the direction of travel are arranged on the inside of a double rocker (16). 4. Rotary tedder according to one of claims 1-3, characterized in that the running wheels (19) are mounted on axle journals (17, 18) connected to a double rocker (16). &bull; t »It 5. Rotary tedder according to claim 1, characterized in that a running wheel (19) is mounted on an axle journal (18) rigidly connected to a double rocker (20), while a second running wheel (19) is designed as a so-called trailing wheel (19, 22) pivotably connected to the double rocker (20) about an approximately vertical axis. 6. Rotary tedder according to claim 5, characterized in that the trailing wheels (19, 22) are arranged in front of the rigidly arranged running wheels (19) in the direction of travel. 7. Rotary tedder according to claim 1, characterized in that all the running wheels are designed as trailing wheels (19, 22). 8. Rotary harrow according to one of claims 1-7, characterized in that the pendulum path of the double rockers (16, 20) is limited by stops (23). &bull; « If I ·