DE8912479U1 - Haymaking machine - Google Patents

Description

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H. NIEMEYER SÖHNE GMBH & CO. KG October 20, 1989 Heinrich-Niemeyer-Straße 52 Big./Av

4446 Hörstel-Riesenbeck

HAYING MACHINE

The invention relates to a haymaking machine according to the preamble of claim 1.

In a known haymaking machine of this type, DE-C-14 57 987, the swivel axes of the tines run approximately perpendicular to the plane of the movement path of the tine tips and the U-shaped guide track parts for the rollers run in a common plane parallel to the path of the tine tips. The guide track of the tines is adjustable in the area of the deflection, so that the tines can be controlled differently using different guide track shapes.

DE-C-36 28 605 describes a haymaking machine in which the two V-belt driven units each rotate upwards by 90° around an approximately horizontal axis and away from the support frame around a vertical axis until both units are approximately parallel.

are pivotably mounted relative to each other, and the two pivot axes intersect each other. The working units are driven by an approximately vertical drive shaft via a bevel gear at their upper ends, which meshes with another bevel gear that can be driven via V-belts.

The object of the invention is to create a particularly simple haymaking machine, in particular a swather, which is functionally reliable with a large working width and is suitable for both front and rear attachment to the tractor.

The invention solves the problem in that each rake body comprises a carrier chain that runs around approximately vertical drive or deflection axes and rake tines supported on these, which are pivotally mounted about parallel pivot axes to the drive and deflection axes and whose alignment to the carrier chain can be changed by means of a control device, that the tine tips of the rake tines enclose a sharp caster angle that opens in the direction of travel and against the direction of chain movement, and that the control devices of the rake tines in the deflection areas of the carrier chain impart a pivoting movement that initially reduces the caster angle and then increases it again,

The design according to the invention creates a haymaking machine that is structurally particularly simple and suitable for large working widths. Despite the large working width, it is short in the direction of travel and is therefore particularly suitable for front attachment to the tractor. However, it can also be used advantageously as a rear-mounted device.

Thanks to the advantageous arrangement of the rake tines, the material to be raked is gently gathered into a swath in the symmetry plane of the device. Thanks to the advantageous control system according to the invention in the area of the drive axle, the rake tines are released from the swath in such a way that the material is not damaged and the swath retains its shape, since as long as the tine tips touch the swath, they are pulled out of the swath as vertically as possible.

The handlebars for controlling the tines can be made of either plastic injection molding or steel. Plastic parts save weight and, when designed as handlebars, are particularly quiet.

If the carrier chains of the rake bodies are provided as a pair of chains, it is advantageous that the bearing distance of the rake tines is set on a larger basis for high loads. The guidance of the carrier chains in rails, preferably plastic rails, also serves to ensure stability and protect the chains. The spaced-apart bearings of the rake tines are also advantageously made of plastic and are detachably connected to the carrier chains.

The use of a pair of carrier chains also offers the advantage that the effective height of the rake tines can be adapted to the working width and thus to the amount of material to be swathed.

For the transport position of the haymaking machine, the rake bodies are swivelled around horizontal axes by approximately 90°. This makes transport much easier, as the tractor and the attached haymaking machine do not become longer for transport. Parking supports ensure that the device

after dismantling, it remains secure. The space required by the device remains small due to the small footprint.

Due to the advantageous design of the invention, the horizontal pivot axis is positioned so that it intersects the vertical center axis of the wide-angle drive shaft for the rake body and thus easily avoids damage to the drive parts. This is structurally simple and user-friendly.

When the rake bodies are brought into the transport position, an automatic locking device comes into action so that the rake bodies are mechanically secured for transport. By connecting the locking device to the driver's seat on the tractor, it is possible to release it by simply operating it from the tractor seat.

The height adjustment of the rake tines to the ground is advantageously carried out using height-adjustable sliding plates, which are arranged coaxially to the drive or deflection axes of the rake bodies. For different operating conditions, it can also be advantageous if this height adjustment is provided using trailing wheels.

So that the haymaking machine can be attached to the tractor either as a front or rear device, coupling parts for the connection to the tractor are provided on both the front and rear of the device. Due to this advantageous embodiment of the invention, it is not necessary to change the direction of movement of the rake tines of the rake bodies when the device is changed from front to rear attachment. The front attachment is used in particular where at the same time at the rear of the tractor

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other devices, e.g. loading wagons, can be used in combination.

Further features and advantages of the invention emerge from the following description and the drawings, in which an embodiment of the haymaking machine according to the invention is shown schematically, approximately to scale. It shows:

Fig. 1 - A haymaking machine according to the invention

in working position, viewed in the direction of travel, with the width of the device shown in abbreviated form .

Fig. 2 - Top view of the haymaking machine

according to Fig. 1 as a front device.

Fig. 3 - The transport position of the haymaking machine.
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Fig. 4 - A detailed view of the rake tine control with handlebars.

Fig. 5 - A detailed view of the control of the rake tines with control rollers.

Fig. 6 ~ Section A^-A through the rake body according to Fig. 1.

Fig. 7 - Section B-B according to Fig. 2.

The haymaking machine shown as an example is a device that essentially consists of two rake bodies (3) and a device center section (31) that is attached to the tractor (1) as a front device. The plane of symmetry of the device (25) lies approximately in the vertical longitudinal center plane (4) of the

Tractor (1). The connection to the tractor (1) is made via the tractor-side coupling rod (33) and the coupling parts (29), the latter being designed as quick couplers. The rake bodies (3) are driven by the tractor-side power take-off shaft via a universal joint shaft (not shown), an angle gear and wide-angle universal joint shafts (35) assigned to each rake body (3) to the drive sprockets (22).

In Fig. 1 and 2, the inclination in the direction of travel, which is advantageous when the device is working, as can be seen in Fig. 6, has been omitted. Furthermore, in Fig. 1 and 2, the rake bodies (3) are shown in abbreviated form. In Fig. 2, details of the rake bodies (3) are only shown schematically for the sake of better clarity.

The haymaking machine according to the example rakes the material over a large working width using two rakes (3) working in opposite directions into the symmetry plane (25) of the device and thus into the vertical longitudinal center plane (4) of the tractor (1). If the device is used in the front attachment (Fig. 2) of the tractor (1), it can be advantageously driven with a follow-on device, e.g. a loading wagon, which is attached to the rear of the tractor (1), thereby increasing the performance.

Each rake body (3) comprises a carrier chain (7) that runs around approximately vertical drive (5) or deflection axes (6), on which rake tines (9) are supported, which are pivotably mounted around pivot axes (11) parallel to the drive and deflection axes (5, 6). Between the drive and deflection sprockets (22, 23) the carrier chain (7) is guided in rails (34), which stabilizes and protects it. The

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Tine tips (10) of the rake tines (9) form an opening caster angle Wl) in the direction of travel (2) and against the direction of chain movement (12). The control device (13) of the rake tines (9) in the deflection areas of the carrier chain (7) initially reduces the caster angle («0) (tf/) and then increases it again.

The rake tine (9) essentially consists of the tine tip (10), which is inclined towards the surface of the earth, arranged trailing, a guide part (16), which is located above the uppermost pivot bearing (17) and to which an approximately horizontal lever part (14) is connected, at the end of which there is a projection (18) whose joint axis (19) is arranged approximately parallel to the pivot axis (11). The handlebar (15) hingly engages this projection (18), which is supported at its other end on the guide part (16) of the rake tine (9) that follows next.

Due to this advantageous embodiment of the invention, the rake tine (9) is not guided in the deflection area according to the theoretical curved path (32), but rather changes the position of the tine tips (10) in relation to the direction of travel (2) in such a way that the tine tips (10) are pulled out of the material to be swathed as vertically as possible, thereby creating a particularly favorable separation between the tine tip (10) of the rake tine (9) and the swath.

The handlebar (15) is shown as a plastic injection-molded part, but can also be designed as a wire body with bearing eyes at the end. 35

As a variant for the control of the rake tine (9), Fig. 5 shows a control at the free end of the lever

control roller (20) arranged in the control part (14). All control rollers (20) are guided in a common control track (21), whereby the control of the tine ends (10) can be influenced by the length of the lever part (14). In the deflection area of the drive axles (5) and deflection axles (6) or the drive sprockets (22) and deflection sprockets (23), the theoretical curved path (32) of the tine tips (10) is left. The illustration (Fig. 5) shows the deviation of the tine tips (10) from this curved path.

The control track (21) for the control rollers (20) are advantageously arranged on the outside of the carrier chain (7) or the carrier chain pair (8) and approximately parallel to the chain movement direction (12).

In Fig. 1 to 7, the variant of the rake body (3) with a pair of carrier chains (8) is shown. The pair of carrier chains (8) enables an advantageous support distance for the rake tine (9). In this simple way, the device can also be easily adjusted in height to the swath size, so that it can also handle large amounts of material. The chains of the pair of carrier chains (8) are guided in rails (34) between the drive and deflection sprockets (22, 23), which stabilizes and protects the chains.

The rake tines (9) are preferably mounted in low-maintenance plastic swivel bearings (17), which are detachably connected to the rotating carrier chains (7, 8).

In Fig. 6 the inclination of the device in the direction of travel (2) is shown, which contributes to a clean work that protects the turf, since the tines

tips (1O) on the front side of the device in the direction of travel (2) work close to the surface of the ground, while the tine tips (10) moving on the back of the device no longer touch the turf.

For the transport position, the rake bodies (3) are pivoted upwards by approximately 90° around a horizontal axis (24) in a manner known per se and automatically locked by a locking device (27). The vertical center axis (26) of the drive wide-angle universal joint shafts (35) advantageously intersects the horizontal pivot axis (24), thereby avoiding damage to the drive parts and increasing operating comfort. The locking device (27) is unlocked, for example, using a cable pull from the tractor seat.

Height-adjustable sliding plates (28) are provided coaxially to the drive and deflection axes (5, 6) of the rake body (3), via which the working height of the tine tips (10) and thus of the device can be adjusted. It can also be advantageous if height-adjustable trailing wheels are provided instead of the sliding plates (28), which ensure additional protection of the turf under difficult operating conditions.

Coupling parts (29) are provided on both the front and rear of the device’s middle section (31) for connection to the tractor (1), so that the device can be mounted on the tractor (1) both at the front and at the rear without any modifications.

The middle part of the device (31) also has four height-

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Adjustable parking supports (30) are attached, by means of which the device can be parked safely in the folded-up transport position (Fig. 3). This makes it possible to store the haymaking machine in a space-saving manner. It can also be removed from the tractor (1) with the rake bodies (3) lowered.

Claims (20)

H. NIEMEYER SÖHNE GMBH & CO. KG October 20, 1989 Heinrich-Niemeyer-Straße 52 Big./Av Hörstel-Riesenbeck CLAIMS 1. Haymaking machine, in particular a swather for front or rear attachment to a tractor, consisting of two rake bodies working in opposite directions, which are arranged symmetrically to the vertical longitudinal center plane of the tractor, characterized in that each rake body (3) comprises a carrier chain (7) rotating about approximately vertical drive (5) or deflection axes (6) and rake tines (9) supported on the latter, which are pivotally mounted about parallel pivot axes (11) to the drive and deflection axes (5,6) and whose alignment to the carrier chain (7) can be changed by means of a control device (13), that the tine tips (10) of the rake tines (9) enclose a sharp caster angle (A) opening in the direction of travel (2) and against the direction of chain movement (12), and that the control devices (13) of the rake tines (9) in the deflection areas of the . . · ft Carrier chain (7) is given a swiveling movement which initially reduces the caster angle (A ¹ ) and then increases it again. 2. Haymaking machine according to claim 1, characterized in that the rake tines (9) have at their end a lever part (14) which, in plan view, encloses an acute angle with the tine tip (10). 3. Haymaking machine according to one of claims 1 or 2, characterized in that the free extension (18) of the lever part (14) is articulated to a link (15) which is supported pivotably about the pivot axis (11) of the next but one rake tine (9). 4. Haymaking machine according to one or more of claims 1 to 3, characterized in that the link (15) on the one hand engages in an articulated manner on the guide part (16) of a rake tine (9) above its pivot bearing (17) and on the other hand forms an articulated connection with an attachment (18) of the lever part (14) of a rake tine (9) running after the other with an articulated axis (19) parallel to the pivot axis (11) of the rake tine (9). 5. Haymaking machine according to one or more of claims 1 to 4, characterized in that the handlebar (15) is designed as a plastic injection-molded part. 6. Haymaking machine according to one or more of claims 1 to 4, characterized in that the link (15) is designed as a wire body with end-side bearing eyes formed by bends. • ff t ·
· · 7. Haymaking machine according to claim 1 or 2, characterized in that the lever part (14) carries a control roller (20) at a free end and that a control track (21) common to all control rollers (20) is provided. 8. Haymaking machine according to claim 7, characterized in that the control track (21) is arranged on the outside of the carrier chain (7) and running approximately parallel to the chain movement direction (12). 9. Haymaking machine according to one or more of claims 1 to 8, characterized in that the support chains of the rake bodies (3) each consist of a pair of support chains (8). 10. Haymaking machine according to claim 9, characterized in that the chains of the carrier chain pair (8) are guided in rails (34) in the area between the drive and deflection chain wheels (22, 23). 11. Haymaking machine according to one or more of claims 1 to 10, characterized in that the rake tines (9) are mounted in at least two vertically spaced pivot bearings (17), preferably made of plastic. 12. Haymaking machine according to claim 11, characterized in that the pivot bearings (17) are detachably connected to the rotating carrier chains (7,8). 13, Haymaking machine according to one or more of claims 1 to 12/ characterized in that each rake body (3) can be pivoted about a horizontal axis (24) located near the plane of symmetry (25) of the device by approximately 90° into a transport position. 14. Haymaking machine according to claim 13/ characterized in that the horizontal pivot axis (24) intersects the vertical center axis (26) of a wide-angle drive shaft (35) for the rake body (3). 15. Haymaking machine according to one or more of claims 1 to 14, characterized in that each rake body (3) can be automatically locked in the transport position by means of a locking device (27). 16. Haymaking machine according to claim 15, characterized in that the locking device (27) can be released from the tractor seat. 17. Haymaking machine according to one or more of claims 1 to 16, characterized in that height-adjustable sliding plates (28) or height-adjustable trailing wheels arranged coaxially to the drive and deflection axes (5, 6) of the rake body (3) are provided. 18. Haymaking machine according to one or more of claims 1 to 17, characterized in that coupling parts (29) for the connection to the tractor (1) are provided both on the front and on the rear of the device middle part (31). 19. Haymaking machine according to one or more of claims 1 to 18, characterized in that at least two height-adjustable supports (30) are provided on the middle section of the device (31).