DE1195999B - Attachment for tractors, especially cultivation fertilizer spreader - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

Number:
File number:
Registration date:
Display day:

AOIc

German KL: 45 b -15/00

1195 999
D33443HI / 45b
May 27, 1960
July 1, 1965

The invention relates to a device or a device for spreading fertilizers and the like for agricultural purposes, which to tractor or similar motorized towing vehicles with the known Three-point hitch can be attached.

There are devices of this type known in which the drive of the device when lifting and lowering the Device is switched on and off automatically to simplify operation. In particular is a Attachment in the form of a sowing device known whose drive from the PTO shaft of the tractor Belt takes place and by means of a switching element designed as a chain by changing the mutual Position of the device in relation to certain parts of the tractor in or out of effect comes. This is the change in distance between a fixed point in the area of the tractor wheel or the PTO shaft and the articulation point of a spring-influenced tensioning device for the drive belt the device shaft is decisive. By influencing the clamping device, however, there is no reliable shutdown of the drive achieved. Smooth straps can be easily removed when relaxed slide, unless special countermeasures have been taken. Be in the known facility V-belt used. In the case of a V-belt, reducing its tension does not become complete Shutdown of the drive achieved, but primarily the slip and thus the wear of the Belt enlarged.

Furthermore, a fertilizer tax can only be reduced slightly in the case of high vegetation, while at small plants must be lowered further. For such variable differences between the The drive is controlled by changing the belt tension as well not suitable because, of course, full engagement or maximum relaxation is only possible in the end positions and works inadequately in one sense or another in intermediate positions.

But there is also the fact that in the known seed drill the spring of the tensioning device when Switching is constantly overstretched because of the long distance to work. In the working position, the spring should have a lot of tension to keep the belt taut. When switching off, she has to then stretched hard to bring the tensioner completely out of the belt's area. That cannot be achieved with a spring without breaking or after a few load changes gets lame.

Attachment for tractors, in particular
Mounted fertilizer spreader

Applicant:

Rudolf Diether, Schwöllbronn (district of Öhringen)

Named as inventor:

Rudolf Diether, Schwöllbronn (district of Öhringen) - -

Finally, in the known arrangement, the grit is quite difficult to mount and dismantle because of the Drive from the PTO takes place via a complicated angle drive.

For all these reasons the establishment is well known unsuitable for practice.

According to the invention, an attachment is provided with automatic switching on and off by a switching element proposed, which is essentially arranged on a device shaft by a claw coupling identifies the halves of which through the switching element under the effect of the change in distance between the rear wheel shaft of the tractor and the implement shaft can be spread apart.

This arrangement allows particularly simple solutions and has the advantage that it is independent of the type of drive via chains, ropes, belts of any kind, etc. and without special training of the Attachment can be used for any device and causes a reliable, instantaneous circuit. The drive for the device is taken from the rear wheel shaft of the tractor in a manner known per se.

In particular, the switching element can be used as a release strut mounted at one end on the tractor rear wheel shaft be formed, the other fork-shaped end on the device shaft is mounted displaceably transversely to the longitudinal axis thereof, the displaceable end of the strut being a wedge or has a wedge surface which, when the strut is displaced with respect to the device shaft, the Disengagement of the clutch causes.

The end of the release strut on the tractor side advantageously has the shape of an over the drive shaft gripping fork, the free ends of which can be closed by means of a plug-in bolt. Through this training the attachment of the device can be carried out in the simplest way without a wrench or other tools can be done in a few simple steps.

509 598/50

The object of the invention is shown in one embodiment in the drawing. It shows

F i g. 1 a fertilizer spreader directly attached to a tractor with a three-point hitch,

F i g. 2 the drive coupling on a larger scale,

F i g. 3 the drive transmission for the spreader.

The spreader consists essentially of a litter box 1, which by means of three control arms 2, 3 and 4, of which the lower (3 and 4) two hydraulic jacks "» can be, is suspended in three points on the tractor 5. Furthermore, the spreader does not include one illustrated spreader roller or spreader worm driving device shaft 6, which has a claw coupling 7 is releasably connected to a sprocket 8, which is mounted on the shaft 6 such that it can be displaced transversely is.

One half of the dog clutch 7 is connected to the sprocket 8, while the other half of the clutch sits firmly on the shaft 6. A conical disk 9 is also attached to this a ° shaft 6, in such a way that a certain distance between this and the collar 10 of the sprocket 8 remains.

To actuate this drive clutch constructed in this way, a release strut 11 is provided which between the drive shaft 12 of the tractor 5 and the implement shaft 6 can be used. To this Purpose, the release strut 11 is fork-shaped on the tractor side, with the open fork end through an insert pin 13 can be closed. The end 14 on the spreader side is also the buttress fork-shaped and engages over the device shaft 6, the fork is so long that the Move the end 14 relative to the device shaft 6 by a substantial distance in the longitudinal direction of the release strut can. In addition, the displaceable end 14 is tapered towards the end and points to this Way on a wedge surface 15, the inclination of which corresponds to that of the conical disk 9. This arrangement causes the wedge surface 15 to move the sprocket 8 into the position shown in FIG. 2 Shifts the position shown in phantom and thereby releases the dog clutch 7. Advanced the end 14 is always when the spreader is raised by the hydraulic jack 3.4 and thereby the distance between the tractor shaft 12 and the spreader shaft 6 is shortened. To the reverse ensure that the dog clutch 7 engages again when lowering the spreader, is on the Shaft 6, a compression spring 16 is arranged, which connects the sprocket 8 with the sliding coupling half presses against the fixed coupling half.

The drive is transmitted to the spreader by means of a link chain 17 which runs from the coupling sprocket 8 to one on the tractor drive shaft 12 seated drive sprocket 18 leads. A spring-loaded one used to tension the chain 17 The tensioner 19, like a chain guide piece 20, is arranged directly on the strut 11. The same applies to a chain guard 21 covering the chain, so that all these parts together with the release strut 11 can be attached and removed again in just a few simple steps and without tools can.

This described type of drive of a fertilizer spreader also makes it possible to use it directly to set up the support frame of a harrow with three-point hitch. This is done advantageously in such a way that the spreader is provided with two forks arranged on the bottom thereof, which Reach over the egg support frame and also on the litter box 1, where the upper link 2 otherwise engages, a plug is attached that can be plugged into the upper mounting of the harrow.

When the harrow is lifted out of its working position, the spreader is also lifted, and thus the latter automatically switched on via the release strut 11 and the clutch 7 in the manner already described. This results in a spatially favorably arranged multiple device that can be operated and operated with one movement can be easily attached to the tractor and removed from it again.

However, the simultaneous attachment of fertilizer spreader and harrow to the tractor is not part of the Invention.

In addition, it should be noted that the inventive design of the drive of the attachment in the described or a similar embodiment, of course, not only for fertilizer spreaders, but can also be used for all other attachments that require a drive from the drive axle of the Require tractor and are attached to the tractor in three-point hitch.

Claims (6)

Patent claims: 1. Attachment for agricultural tractors with three-point hitch with automatic and switching off the drive of the device when lowering and lifting the device, wherein the automatic switching on and off of the drive is effected by a switching element that is dependent on on the relative position of the implement in relation to certain parts of the tractor in or becomes ineffective, in particular box fertilizer spreader, characterized by one arranged on a device shaft (6) Claw coupling (7), the halves of which through the switching element under the effect of the change in distance can be spread apart between the rear wheel shaft of the tractor and the implement shaft. 2. Apparatus according to claim 1, characterized in that the switching element is designed as a release strut (11) mounted with one end on the tractor rear wheel shaft (12), which with its other fork-shaped end (14) on the device shaft (6) transversely to the latter The longitudinal axis is displaceably mounted, the displaceable end (14) of the strut (11) having a wedge or a wedge surface (15) which, when the strut (11) is displaced with respect to the device shaft (6), disengages the coupling (7 ) causes. 3. Device according to claim 2, wherein the drive of the device from the rear wheel shaft of the Tractor takes place via a chain drive on the device shaft, characterized in that the one half of the coupling (7) with one of the chain sprockets (8) provided with a collar (10) of the Chain drive (8,17,18) connected and with this against spring pressure (16) on the device shaft (6) is displaceable, while at a certain distance from this sprocket (8) one with the other Half of the coupling (7) connected conical washer (9) sits firmly on the device shaft (6), such that the displaceable strut end (14) between the sprocket collar (10) and the conical disk (9) engages over the device shaft (6) and to spread the coupling with its wedge surface on the conical disc (9). 4. Attachment according to claims 2 and ~ 3, characterized in that the tractor-side The end of the release strut (11) has the shape of a fork reaching over the drive shaft (12), the free ends of which can be closed by means of a plug-in bolt (13). 5. Attachment according to claim 3 with one serving to tension the chain of the chain drive Chain tensioner, characterized in that the chain tensioner (19) on the release strut (11) is arranged. 6. Attachment according to claims 2 to 5, characterized in that in per se known Way a chain guard (21) is provided and attached to the release strut (11). Considered publications:
U.S. Patent Nos. 2,901257, 2,755,002. 1 sheet of drawings 509 598/50 6.65 © Bundesdruckerei Berlin