DE1008944B - Three-point suspension for devices attached to the tractor - Google Patents

Description

GERMAN

The well-known three-point suspension for implements attached to the tractor or tractor, like plows or the like, consists generally of two lower links, which are on the sides of the tractor frame are mounted vertically pivotable, and a middle, upper, articulated on the tractor frame Handlebars, the free ends of these handlebars on a transverse and upright link, also mounting frame called, attack, with which the plow frame or leg with respect to the vertical plane firmly connected is. Lifting levers operated by hand or power are used to raise and lower the plow, which are connected to the two lower links by means of support rods.

In such three-point suspensions, it is known to use the upper link for the mounting frame to connect the lifting lever with the interposition of a sliding guide, so that the device is free can adapt to different ground resistances. The lifting lever and the support rods with it connected two lower links are found in this version.

Such freely movable devices have the aim of nodding movements of the tug, which this when Driving on uneven ground or caused by changing ground resistance in order to tilt the two lower pivot points, and as a result of the associated change the inclination of the guide sole of the plow to create a furrow of uneven depth. While Thus, with such freely guided plowing, pitching movements of the plow are not completely eliminated can, with the invention, a forced return to the normal position is to be carried out continuously can be achieved with pitching movements of the tractor as well as with changing ground pressure.

The invention, which relates to a three-point hitch for on the tractor or on the tractor attached devices, such as plows or the like, is that the upper, on a transverse and upright, with the plow frame or -grindel firmly connected in the vertical direction and on the lower links hinged mounting frame attacking, guided to the usual articulation point of the tractor frame Handlebar is designed in two parts by switching on a joint or a longitudinal displaceability and the relative movements of the .ein part compared to the other part are transmitted directly or indirectly via intermediate links to the lower links.

Such a three-point suspension creates an interaction between the pitching movements of the plow or the upper pivot point of the mounting frame and the lower links by the three-point suspension
for implements attached to the tractor

Applicant:
Pflugfabrik Lemken KG, Alpen (Ndrh.)

Nodding movements of the former can be used to regulate the height of the lower links. The two lower hinge points for the mounting frame can be placed higher or lower, ie at pitching movements so that the device automatically again} n its normal draft location is returned.

There are many embodiments for this inventive idea possible. So the handlebar part can represent a lever with three articulation points, the One point of articulation with the tractor frame, the second point of articulation with the upper link and the third The pivot point is connected to the intermediate links for the two lower links. It is also possible that the fixed lifting arm of the lifting device is the fixed articulation point for the handlebar part represents, wherein this pivot point can be adjustable in height.

According to a further embodiment of the invention, the object can also be achieved by that the one at the upper end of a transverse and upright standing, with the plow frame or -grindel in perpendicular Attacking the direction of the permanently connected mounting frame, with the usual articulation point on the tractor frame connected handlebars from two against each other against the pressure of a spring od. The like. einschiebbsjren Share consists and the part connected to the pivot point by means of a push rod with the upper point of the intermediate link connected to the tractor frame by means of a further link for the lower link is connected.

This embodiment of the invention also allows various embodiments; for example can the support rods omitting a special upper connection to the tractor frame in the

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upper handlebar be guided in a vertical guide.

The drawing shows exemplary embodiments of the invention with further details. In the drawings the three-point suspension is shown in side view.

In all of the figures, the tractor frame 1 is shown with two lateral lower pivot points 2 for the two lateral lower link 3 provided, on which the device frame or, for example, Pfluggrindel 5 connected mounting frame 4 is articulated in the hinge points 6. The upper end of the mounting frame 4 carries the upper two-part link 8, 12 at the pivot point 7, the part 12 of which is at the fixed point 13 of the tractor 1 is articulated. The two lower links 3 are in different ways with the • two-part link 8, 12 connected, as well as the lifting lever moved by hand, hydraulically or mechanically 10 is connected to the handlebars in different ways.

In the embodiment according to Fig. 1 is the connecting the two parts 8 and 12 of the upper link The pivot point 11 is connected to the lower links 3 by the intermediate link 9. The lift arm 10 to raise and lower the device engages by means of the tension member 14 at point 11 and transmits the tensile force Via the intermediate links 9, which also act at point 11, on the lower links 3 and at the same time on the upper handlebar 8.

With this three-point suspension, the upper pivot point 7 of the mounting frame 4 leads due to the high Ground pressure or different inclinations of the tractor a nodding movement in the direction of the arrow 15 off, then the angle that parts 8 and. 4 form with each other, stretched and thus the Point 11 in the arc around point 13 upwards. This upward movement is via the Intermediate link 9 transferred to the lower link 3, so that the articulation points 6 are also after move up. So if the plow has a tendency to go deeper, it will automatically move upwards.

In the embodiment according to Fig. 2, the link part 12 is designed as a lever with three articulation points. The intermediate link 9 is engaged with the third coupling point 9 ^a, while the function of the articulation points remains the same 11 and 13, so> that also the operation here is the same as in the embodiment of FIG. 1.

According to Fig. 3, the articulation point 13 of the handlebar part 12 is connected to the lifting arm 10, which is through the adjustable stop 16 is fixed during work and thereby the fixed articulation point 13 represents. Here, too, the effect of the link part 12 is the same as in the exemplary embodiment according to Fig. 2.

Fig. 4 shows an embodiment similar to Fig. 3. The lifting arm 10 is the lifting arm of a power lift 17, which rests firmly in the working position on the adjustable stop and its end therefore the fixed Articulation point 13 for the handlebar part 12 represents.

In the embodiment according to FIG. 5, the link 12 having the three articulation points 11, 13 and 9 ° is formed from two rods 12 ° and 12 ⁶ , which are rigidly but adjustable connected ^{by the variable-length member 12 C.} The relative movements between the links 8 and 12 are transmitted here directly to the lower links 3 by the link part 12 ⁶ with its free end corresponding to the articulation point 9 ° sliding in the direction of travel, for example by means of rollers 18, on the lower links. 3 is performed. For lifting and lowering, the lifting lever 10 is connected to the lower links 3 by means of a lifting rod 9.

In the exemplary embodiment according to FIG. 6, the nodding movement of the upper end of the mounting frame 4 Transferred to the two lower links 3 in that in which the two link parts 8 and 12 connecting Articulation point 11, a tension and compression member 20 is guided to the lifting arm 10, at which the intermediate links 9 attack for the two lower links 3.

In the exemplary embodiment according to FIG. 7, the nodding movement of the upper end of the mounting frame 4 thereby transferred to the two lower links 3 that the two connecting the articulation points 7 and 13 Parts 8 and 12 of the upper link are longitudinally displaceable to one another. The one between the both parts 8 and 12 switched on spring 21 tries point 7 of the upper end of the mounting frame 4 always returned to the end position limited by the stop 24, in which the plow is in the set Deep works. With increased pressure of point 7, the spring 21 gives way and transmits the here occurring relative movement between points 7 and 13 on the push rod 22 on the End point of the lifting lever 10 and from this via the intermediate link 9 to the lower link 3.

A similar embodiment is shown in Fig. 8, in which the upper link also consists of two against each other displaceably guided and loaded by the spring 21 parts 8 and 12 consists. However, the Intermediate link 9 is not guided by the lifting lever 10, but this guide is as a guide 26 on the Link part 12 is provided in which the intermediate link 9 is guided around a horizontal pin 25 rotatable and longitudinally displaceable.

Claims (8)

PATENT CLAIMS: 1. Three-point suspension for on the tractor or Devices attached to the tractor, such as plows or the like., characterized in that the upper, on a transversely and upright, with the plow frame or tine (5) in a vertical direction connected and articulated to the lower links mounting frame (4) attacking to the usual Articulation point (13) of the tractor frame (1) guided handlebars (8,12) by switching on a Joint (11) or a longitudinal displaceability is formed in two parts and the pitching movements relative movements of one part (8) with respect to the other Part (12) directly or indirectly via intermediate links (9 or 9 °) on the lower link (3) be transmitted. 2. Three-point suspension according to claim 1, characterized in that the handlebar part (12) represents a lever with three pivot points. 3. Three-point suspension according to the claims 1 and 2, characterized in that the fixed lifting arm (10) of the lifting device represents the fixed articulation point (13) for the handlebar part (12). 4. Three-point suspension according to claim 3, characterized in that the articulation point (13) of the lifting arm (10) is adjustable in height. 5. three-point suspension according to claim 2, characterized characterized in that the handlebar part (12) with its lower articulation points (18) engages the handlebars (3) and slides along its lower edge is. 6. Three-point suspension according to claim 5, characterized in that the handlebar part (12) is adjustable in angle by means of an interposed, variable- ^{length connection (12 C).} 7. Three-point suspension for implements such as plows attached to the tractor or tractor or the like, according to claim 1, characterized in that the at the upper end (7) of a transversely and upright, with the plow frame or -grindel (5) firmly connected in the vertical direction mounting frame (4) attacking, with the usual attack steering point (13) on the tractor frame (1) connected link (8, 12) from two against each other the pressure of a spring (21) or the like. Insertable parts and that with the pivot point (7) connected part (8) by means of a push rod (22) with the upper, with the tractor frame (1) by means of a further link (10) connected point (23) of the intermediate link (9) for the lower link (3) is connected. 8. three-point suspension according to claim 7, characterized in that the intermediate links (9) eliminating a special upper connection to the tractor frame (1) in the handlebar part (12) are guided in a vertical guide (26). 1 sheet of drawings © 709 510/47 5.