JPH0449366B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a pipe member, a shaft member slidably guided in the pipe member in the axial direction, and a shaft member for coupling to a lower rod and a pivot point of a tractor, respectively. The present invention relates to a lateral stabilizer of the lower rod of a three-point attachment device for coupling agricultural equipment to a tractor, comprising a connecting member provided.

A lateral stabilizer of the lower rod of a three-point mounting device is known (DE 3129537). The side stabilizer has a lockable floating position and has a spring acting between the side stabilizer and the lower rod to return the lower rod to a predetermined position.

In the case of the side stabilizer, the operating position of the return spring is selected such that the force applied in the return direction is minimal.

Another disadvantage of said side stabilizers is that if the basic length of the stabilizer is changed, the stabilizer must be removed at the pivot point on the tractor side or at the pivot point on the lower rod side in order to be able to rotate the threaded member. That's the point.

It is an object of the invention to provide side stabilizers which, in a floating position, can deflect the lower rod from an adjustable preferred position to both sides against a spring force, in this case acting as an outer spacing member of the lower rod. There is a particular thing.

The above purpose is to connect a pipe member, a shaft member slidably guided in the pipe member in the axial direction, and a connecting member provided on the pipe member and the shaft member respectively for connection to the lower rod and the pivot point of the tractor. The pipe member is provided with two stoppers facing radially inward, and the shaft member is provided with two stoppers facing radially outward and a spring disposed between them in the area guided by the pipe member. In the lateral stabilizer of the lower rod of the three-point attachment device for coupling agricultural equipment to the tractor, which is provided, (a) the stopper 17 of the pipe member 13 and the stopper 18 of the shaft member 14 are respectively in the starting position facing each other; The respective stoppers 17 and 18 of the pipe member 13 and the shaft member 14 are intermediately connected to the retainer ring 19 which abuts on the two arranged stoppers, and act on a common support surface 40 acting in the axial direction. (b) only one compression spring 15 is attached to each supporting surface 4 on both sides;
(c) the pipe member 13 and the shaft member 14 are held in a preloaded state between 0 and 0;
This is achieved by means of stabilizers that are designed to prevent each other from idling.

The inventive design of the side stabilizer has the advantage that, due to the prestressing of the compression springs, even in the event of a slight deviation from the preferred position, a large return force is generated which can overcome the friction of the system.

In this way, the lateral stabilizers arranged on each of the two lower rods of the three-point anchorage simultaneously take on the function of a spacing member, thus providing a spacing element in the free space between the tractor and the anchorage, as in known constructions. There is no need to provide

Therefore, the degree of freedom of movement of the attached joint shaft is completely maintained.

In a preferred embodiment of the invention, the support surface is
It is formed by a presser ring held on each stopper.

This design makes it possible to easily adapt the preload to the respective requirements.

According to another essential feature of the invention, the sliding movement of the pipe member relative to the shaft member is damped. Such measures prevent the attached working implement from swinging and creating dangerous movement conditions.

In an advantageous embodiment of the invention, the damping is provided within the compression spring by a leaf spring packet cooperating with a spacer bushing on the shaft member.

In this embodiment, the damping takes place as end-position damping only when the spacing bushing rests on the leaf spring packet. That is, the damping effect occurs due to the friction generated between the leaf springs.

In a further advantageous embodiment of the invention, the damping takes place by means of a piston-cylinder action between the pipe part and the shaft part.

In this case, use is made of the compression effect that occurs in the compression spring receiving space when the pipe member moves relative to the shaft member. This compression effect thus results in a flow of compressed air through the diaphragm opening or through the spacing created between the hold-down ring and the structural element cooperating with this ring.

According to another feature of the invention, the pipe member and the shaft member are lockable with respect to each other in a position determined by a compression spring.

According to this embodiment, the floating position of the side stabilizer can be fixed and the attached equipment can be fixed.

According to another feature of the invention, the pipe part and the shaft part can be locked to each other by means of a bayonet bolt via a through bore in these parts.
In this case, the lock is the conventional one in civil engineering.
This is done using a so-called folded plug.

According to another embodiment of the invention, the shaft member is provided with an annular groove and the pipe member is provided with a locking jaw which can be expanded against the spring force by means of an eccentric lever and which cooperates with the annular groove in the locking position.

In this embodiment, the two shafts can be locked together from the driver's seat of the tractor via a tension rope fixed to the eccentric lever.
This embodiment is particularly advantageous if the lower rod is automatically transferred to and released from the floating position. In this case, a length of tension rope or chain is hung at a suitable point on the back of the tractor.
If you lower the lower rod to the operating position of the installed equipment,
A tension is applied to the eccentric lever, which spreads the locking jaws and thus moves the side stabilizers into the floating position.

Conversely, when the lower rod is raised by the power lifting mechanism, the eccentric lever is released and the side stabilizer is locked.

In an advantageous embodiment of the invention, the pipe part is divided into two parts in the region not used for receiving the shaft parts, and the two shaft parts can be locked with each other in a plurality of positions corresponding to the positions of the lower rod. .

According to an essential feature of the invention, one of the connecting members
One is connected to the pipe member or shaft member by a locking nut having male and female threads of different pitches.

According to this embodiment, it is possible to change the length of the side stabilizer without providing an end-side connection member, and in particular, it is possible to change the length of the side stabilizer by connecting the lower rod of the attached working implement. It can be pulled by. This is essential in the case of so-called "rushes", as occurs, for example, when using a reversing device on a tractor.

According to another embodiment of the invention, one of the screws is left-handed.

According to this embodiment, the change in length of the side stabilizer per revolution can be increased.

The invention will be explained in more detail below with reference to illustrated embodiments.

FIG. 1 shows a three-point attachment device installed at the rear of the tractor. FIG. 1 shows a transmission 1 and a rear axle 2 of a tractor. Two lower rods 6 and one upper rod 5 are pivotally connected to pivot points provided for this purpose. Lower rod 6
can be swiveled around a tractor pivot point via a lifting beam 4 by a powered lifting mechanism 3.

The side stabilizer 7 is connected to the tractor via a pivot point 8 and to the lower rod 6 via a pivot point 9 .

The plan view of FIG. 2 shows the arrangement of the side stabilizers with respect to the lower rod 6.

Pivot point 8 of lower rod 6 and side stabilizer 7
are on a common pivot axis.

As shown in FIG. 1, the length of the side stabilizer 7 can be varied manually or automatically via a tension rope 10 or a fixed pivoted tension rope or chain 11.

FIG. 3 shows a longitudinal sectional view of the side stabilizer. This side stabilizer consists of a pipe member 13 consisting of two pipes superimposed and connected to each other.
and a shaft member 14 movably guided in the axial direction inside the pipe member 13.

The pipe member 13 includes a first stopper 17a that is made of an overlapping portion of pipes and faces radially inward;
a second radially inwardly directed stopper 17b supported by a bushing;
It is inserted into the pipe member 13 and is held radially outwardly by an axial securing member in the form of a rebound ring or a radially inwardly directed projection.

The shaft member 14 is provided with a stop 18a (represented by a step) and a further stop 18b (represented by a recoil ring). Stoppa 18
A spacing sleeve 26 is supported on b, by means of which the active surface of the stopper 18b is placed in the same plane as the stopper 17a consisting of an overlapping part. On both sides of the stopper consisting of the shaft member 14 and the pipe member 13, a retaining ring 19 is provided which has a supporting surface 40 for supporting a compression spring 15 which is loaded on both sides.

Based on the above-mentioned installed state, the compression spring 15 is
Both when the side stabilizers extend and when they shorten against the load, they are further compressed.

Thus, a slight return or sliding movement of the shaft member 14 relative to the pipe member 13 ensures a large return force, regardless of the sliding direction.

The floating position of the side stabilizer shown in FIG. 3 can be eliminated by inserting the bayonet bolt 16 into the pipe member 13 and the shaft member 14.

As the insertion bolt 16, a known folded plug commonly used in civil engineering can be used.

For this purpose, the pipe member 13 and the shaft member 14 are provided with mutually corresponding through bores 27, 28.
is provided.

One of the connecting members 12 of the side stabilizer includes:
A threaded bolt 20 is provided which can be screwed into a corresponding internal thread of the pipe member 13 and secured by a locking nut 21. Therefore, the length of the side stabilizer (FIG. 3) can be changed to suit each coupling condition.

In the embodiment of the side stabilizer shown in FIG.
It consists of an annular ridge that abuts. Presser ring 19
Similarly, the rebound ring 18 of the shaft member 14
comes into contact with.

In the free space accommodating the spring, a spacing sleeve 25 is provided on the shaft member 14, which serves as a stop for the oscillating movement of the side stabilizer.

On the right side of FIG. 4, another pipe member 13a is shown slidably received within the pipe member 13. The pipe member 13 is provided with two through bores 23 spaced apart in the axial direction in the same axial plane. By simply inserting the bayonet bolt 22 into the bore and the through-bore 29 provided in the shaft member, the length of the side stabilizer can be adapted to two different coupling conditions.

A locking nut 24 is screwed into the pipe member 13a, which can be secured by a locking nut 21 and can receive a connecting member via a threaded bolt 20. The male and female threads of the lock nut 24 have different pitches so that the length of the side stabilizer can be changed by rotating the lock nut 24 without removing the connecting member 12 from its pivot point.

FIG. 5 shows a side stabilizer which can be stopped in a floating state by a locking device 30. In this embodiment, the shaft member 14 is provided with an annular groove 31 in which a spring-loaded locking jaw 33 engages for locking in the floating position. Locksmith 3
3 can be pivoted out of the locking position by means of an eccentric lever 32.

Eccentric lever 3 is used for manual locking or unlocking from the tractor driver's seat or for automatically shifting the side stabilizer from the floating position to the locking position by raising the lower rod 6.
2 can be hung by a tension rope or chain (not shown in FIG. 5) (FIG. 1).

Preferably, the locking device 30 is provided with a cover 36 in which a bellows 37 is retained, which surrounds the eccentric lever 32 at its free end and thus protects the locking device 30 from the ingress of dirt and dust.

FIG. 6 shows a top view of the locking device 30.
In this case, a cover 36 is placed around the eccentric lever 32.
is recognized.

FIG. 7 shows the locking device 30 in the locked position. The locking jaw 33 engages the annular groove 31 of the shaft member 14 and prevents relative movement of the shaft member with respect to the pipe member 13. The locking jaw 33 is held in the locked position by a spring supported on the pipe member 13.

As shown in FIG. 8, inside the spring 34, when the locking device 30 is in the unlocked state, the shaft member 1 is
4 and thus the locking device 3
A pin 35 is provided to indicate a zero unlocked state.

The locking jaw 33 is pivoted on a receiving pin 38 which at the same time serves as a mounting screw for the locking device 30.

FIG. 9 shows a partial cross-sectional view of the side stabilizer. In this case, damping takes place in the floating state. Here, the damping effect is achieved by the cooperation of the spacing sleeve 25 and the leaf spring packets 39 provided on both sides of the compression spring 15. The leaf springs 39 provide a damping effect due to the internal friction that appears between each leaf spring when the opposing member is started.

[Brief explanation of the drawing]

Fig. 1 is a drawing of the entire three-point attachment device at the rear of the tractor; Fig. 2 is a plan view showing the arrangement of the lower rod and related side stabilizers; Fig. 3 is a schematic cross-sectional view of the side stabilizers; 5 is a sectional view of a side stabilizer that can be locked by a locking gear engaging an annular groove; FIG. The plan view, Figure 7, is
FIG. 8 is a top view showing the locking device in the locked state.
FIG. 9, which is a sectional view of the locking jaw in the expanded state (locked state), is a partial sectional view showing the damping effect in the floating state. 1...transmission (tractor), 2...
... Rear axle, 3 ... Power lifting mechanism, 4 ... Lifting beam, 5 ... Upper rod, 6 ... Lower rod, 7 ... Side stabilizer, 8 ... Tractor pivot point, 9 ... Lower rod 10... tension rope for manual operation, 11... fixed tension rope or chain pivoted, 12... connection member, 13... pipe member, 13a... second pipe member, 14... ...Shaft member, 15... Compression spring, 16... Insertion bolt, 17a, 17b... Stopper facing radially inward, 18a, 18b... Stopper pointing radially outward, 19... Holder ring, 20 ...screw bolt, 21 ... lock nut, 22 ... insertion bolt, 23, 27, 28, 29 ... bore, 24 ...
Lock nut, 25, 26... Separation sleeve, 30...
... Lock device, 31 ... Annular nut, 32 ... Eccentric lever, 33 ... Lock jaw, 34 ... Spring, 35 ... Pin, 36 ... Cover, 37 ... Bellow, 38 ... Reception pin, 39 ... Leaf spring packet, 40... support surface.

Claims (1)

[Scope of Claims] 1. A pipe member, a shaft member slidably guided in the pipe member in the axial direction, and a connecting member provided on the pipe member and the shaft member, respectively, for coupling to the lower rod and the pivot point of the tractor. The pipe member is provided with two stoppers facing radially inward, and the shaft member is provided with two stoppers facing radially outward in the area guided by the pipe member, and the shaft member is provided with two stoppers facing radially outward. In a lateral stabilizer of the lower rod of a three-point attachment device for coupling agricultural equipment to a tractor, which is provided with a spring, (a) the stopper 17 of the pipe member 13 and the stopper 18 of the shaft member 14 are each in the starting position facing each other; Each stopper 17 of the pipe member 13 and the shaft member 14 is connected intermediately to a retaining ring 19 that abuts on two stoppers arranged as shown in FIG. and 18 are matched to each other; (b) only one compression spring 15 is attached to each supporting surface 4 on both sides;
(c) the pipe member 13 and the shaft member 14 are held in a preloaded state between 0 and 0;
Stabilizers are characterized by ensuring that they do not spin relative to each other. 2 (d) Pipe member 1 to shaft member 14
3. The stabilizer according to claim 1, wherein the sliding movement of the stabilizer is damped. 3 (e) Damping is achieved by using a compression spring 1 on the shaft member 14.
3. A stabilizer according to claim 1, characterized in that the stabilizer is provided by a leaf spring packet (39) cooperating with a standoff bush (25) provided inside the stabilizer. 4(f) The damping is performed by a piston-cylinder action between the pipe member 13 and the shaft member 14.
Or the stabilizer described in item 2. 5 (g) Pipe member 13 and shaft member 14
5. A stabilizer according to any one of claims 1 to 4, characterized in that the stabilizers can be mutually locked at a position determined by a compression spring 15. 6 (h) Pipe member 13 and shaft member 14
The stabilizer according to any one of claims 1 to 5, wherein the stabilizers can be mutually locked by an insert bolt 16 through through bores 27 and 28 arranged in the above-mentioned portions. 7 (i) The shaft member 14 has an annular groove 31, and the pipe member 13 has a locking jaw 33 that can be expanded against the spring force by an eccentric lever 32 and cooperates with the annular groove 31 in the lock position. The first claim characterized in that
The stabilizer according to any one of items 1 to 5. 8 (j) The pipe member 13 is divided into two parts in a range not used for receiving the shaft member 14, and both pipe members 13, 13a are mutually locked at a plurality of positions corresponding to each position of the lower rod 6. The stabilizer according to any one of claims 1 to 7, characterized in that the stabilizer is capable of: 9 (k) One of the connecting members 12 is connected to the pipe member 13 or the shaft member 14 via a locking nut 24 having male and female threads of different pitches. The stabilizer according to any one of items 1 to 8. (10) (l) The stabilizer according to any one of claims 1 to 9, wherein one of the screws is a left-handed screw.