DE2825678A1 - SUSPENSION MECHANISM FOR A FIELD DEVICE, FOR EXAMPLE A HARVEST BAR, FOR COUPLING TO THE THREE POINT ATTACHMENT OF A TRACTOR - Google Patents

Description

P A 7 FNTA N W Al.

R. SPLANEMANN

DIPL.-ING.

Munich

dr. B. REITZNER

DlPL-CHEM. Λ

J. JUDGE

DIPL.-ING.

F. WERDERMANN

DIPL.-ING.

HAMBURG

Maskin factories
Taarup A / S

Kerteminde / Denmark

Patent application

8000 MUNICH 2 -] £. JUIli 1978

Valley 13

Telephone {089) 22 62 07/22 02 09 Telegrams: Inventius Munich

Our AkIc: 3340-1-10.302 Your reference:

Suspension mechanism for a field device, for example a harvesting beam, for Coupling to the three-point attachment of a tractor

809881/0823

Konlen: Deutsche Bank AG, Muncnen, account no. 20/14 009 Posischeck Munich 600 60-807

The invention relates to a suspension mechanism for a Field device, for example a harvesting beam, for coupling 321 the three-point attachment of a tractor.

Au3 of the Danish patent application ITr. 13oo / 77 a suspension mechanism is known which allows the field device to pivot backwards and upwards when it hits a stone or other dangerous obstacle, so that it is lifted over the obstacle. When the field device has thus passed the obstacle undamaged, it is automatically pulled back into the working position by an expansion spring in the form of a tension spring.

With the suspension mechanism known from this, the The weight of the field device is essentially borne by the balancing spring. There are therefore limits to how big and heavy field devices in connection with this known Hanging mechanism can be used.

The purpose of the invention is to create a suspension mechanism of the type specified in the opening paragraph, which is located under Retention of the backward panning and automatic Pivoting back the field device for even larger and

809881/0823

Can use heavier field devices than the known suspension mechanism.

This is achieved by the fact that the invention Suspension mechanism from a transverse to the direction of travel There is a swivel bar, one end of the swivel bar protruding outside the tractor and is set up to carry the field device while the other end of the swivel beam behind the tractor is intended to be used with the upper arm of the Three-point attachment and yours from the outstanding end of the Swivel beam most distant of the lower arms of the three-point attachment directly in such a way rotatably connected to v / earth that the swivel bar pivot around a line through these two connection points can., and the swivel bar in the area of the other lower arm of the three-point attachment one in the direction of travel has forward console with a stop for the upper end of a compression spring by the lower end the compression spring is connected to the mentioned other lower arm of the three-point attachment. The two arms of the The three-point attachment of the tractor, with which the swivel beam is rotatably connected, contribute significantly to the carrying capacity the weight of the field device and the Scirrenkbar at, while the compression spring in the v / eseitlichen, only the swivel beam a sufficient. Torque around the Line through the two connection points,

809881/0823

-Z-

(ρ

urr. him in the working position ae ~. -'eldrerätes appropriate position, and at the same time granted the possibility of an adjustment of the pressure of the field device to the ground, IYe when the field device hits an obstacle, it zv / ingt the end of the swing beam protruding outside the tractor to the rear , v: o through the swing beam u.ii the line through ssii'-e two connection points r, it will swing the upper arm of the tractor or the arm furthest from the protruding end of the swing beam. This pivoting results in a compression of the compression spring, which forces the pivot bar to pivot back when the obstacle has been passed. During the backward pivoting and the resulting pivoting of the pivoting bar about the line mentioned, the field device is lifted upwards and thereby helped to guide it over the obstacle.

An appropriate adjustment of the tension of the spring is achieved according to the invention in that the compression spring Mxttel to adjust its bias in the working position of the field device has the corresponding position of the swivel bar.

A purposeful limitation of the pivoting of the swiveling bar to the position corresponding to the working position of the field device can be achieved within the scope of the invention in that the mentioned console has a downwardly protruding "Zeil" with a gripping-stop device z'xz Zu3ar:; :: env / irks

with a corresponding cutting device εζι lower end 809881/0823

the compression spring.

The invention γ / ird is explained in more detail below with reference to the drawing explained. Show it

1 with a suspension mechanism according to the invention a field device in its working position, and

Fig. 2 shows the same suspension mechanism with the field device in a backward sge pivoted position.

The drawing shows the three-point attachment of a tractor consisting of an upper arm 1 and two lower arms 2 and 5. A swivel beam 4 consisting of an essentially horizontal part ka lying transversely to the direction of travel. and a downward sloping portion l + b connected thereto is rotatably connected to the upper arm and the lower arm 2 in such a manner that it can pivot about a line through these two connection points. One end of the horizontal part 4a of the Scliv / enkbalkens if protrudes outside the tractor and has a bearing 5- in which a field device 6 is suspended,

In the area of the lower arm 3 of the three-point attachment is on top of part 4a of the swing beam a bracket 7 which projects forward in the direction of travel and which has a stop 8 for the upper end a compression spring 9, the lower end of the compression spring by a TJ-shaped fitting Io is connected to the lower arm 3. The compression spring 9 is usi a guide rod 11 arranged through the stop 8 can slide freely. 809881/0823

The console 7 has a downwardly protruding part 12, and. the lower end of this part is a stop device 13 to the in the working position of the Field device to rest on a corresponding stop device lif is provided at the rear end of the lower arm 3.

809881/0823

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Claims (3)

2S25678 claims 1. Suspension mechanism for a field device, for example one Harvesting bar, for coupling to the three-point attachment of a Tractor, characterized in that he consists of a swivel bar arranged transversely sur the direction of travel, with one end of the swivel bar outside of the tractor protrudes and is set up to carry the field device, while the other, behind the tractor lying end of the Scimenkbalkens is provided with the upper arm of the three-point attachment and desi of the outstanding Farthest end of the swing arm the lower arm of the three-point attachment directly in one so rotatably connected to γ / earth that the Schr; enkbalken can pivot about a line through these two connection points, and the pivot bar in the area of the other lower arm of the three-point attachment one in the direction of travel has forward console with a stop for the upper end of a compression spring by the lower The end of the compression spring is connected to the mentioned other lower arm of the three-point attachment. 2. suspension mechanism according to claim 1, characterized in that that the compression spring means for adjusting its tension in the working position of the field device has the corresponding position of the Sehwenkbalkens. 3. Suspension mechanism according to claim 1 or 2, characterized g ekennzei chnet that the mentioned console has a downwardly protruding part with a gripping stop device 809881/0823 -z- zua Zu sa; r :::: ei: v; ir '-: en. with a corresponding stop device ar. lower end of the compression spring for the purpose of specifying the working position of the field device has the Steliun =: of the Schv / enkbalkens. 809881/0823