FI79676C - STYRSYSTEM FOER PAOHAENGSVAGN TILL TERRAENGFORDON. - Google Patents

Description

The present invention relates to a control system for a semi-trailer, forestry tractor or similar off-road vehicle trailer.

In previously known off-road vehicles, the load is placed completely on top of the actual vehicle or, if the vehicle is equipped with a semi-trailer11a, the trailer is connected to the towing vehicle only by means of a drawbar.

The essential disadvantage of the known structures is that the semi-trailer does not follow the tracks of the towing vehicle and the semi-trailer straightens in a curve, making it difficult to move in the terrain, secondly because the load is rigid, very difficult to overturn and thirdly difficult to reverse.

It is an object of the present invention to provide a novel type; a semi-trailer steering system which does not have the above-mentioned drawbacks. To achieve this, the device according to the invention is characterized by what is set forth in the characterizing part of claim 1.

The most important advantage of the device according to the invention can be considered to be the traces of the vehicle which precisely pulls the steering of the semi-trailer, whereby movement in the terrain is facilitated. The luggage compartment is provided with two bunks which are able to rotate relative to each other, for example, to one side of the semi-trailer hits the top of the stone is not full load, but the driving of the tilt of the vehicle remains without tilting the bunk. In this situation, the load acts like a torsion spring, thus reducing the risk of tipping over. The vehicle also has a very small turning circle, which is a significant advantage in difficult off-road conditions. Reversing the vehicle is also easy because the semi-trailer is easy to steer.

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In the following, the invention will be explained in detail with reference to the accompanying drawings.

Figure 1 shows the structure of the control system seen from the side.

Fig. 2 e s i l I; i ä is a cross-section of the line I - I s n n n I a a of Fig. 1 with the vehicle in a curve.

According to my figure and 2, the control system of the trailer I1 comprises a bending rigid beam 1 connected to a vertical table 3 by a vertical pin bearing furnace 2. and a traction table 3 connected to the rear frame 5 of the vehicle by a transverse pin 1 aa , which allows the beam to be fixed to the banks of the algae by 9 turns of the sea buckthorn, relative to each other.

The beam 1 is fixed vertically L n p pj l.aaker i J la 6 to the semi-trailer body 7. The beam 1 thus transmits longitudinal forces between the vehicle and the semi-trailer and keeps the banks vn 1jmaLka constant, but allows the banks to rotate relative to each other.

• The parasitic part of the semi-trailer control system comprises a • paycheck 11,12. The beam il is connected by transverse pin bearings niI 1a a K) to the rear frame 5 of the vehicle. The other end of the beam 11 is fixed by a towbar 12 pa Litki in 13. The beam 13 moves halfway with respect to the trailer body only in the longitudinal direction. When the rear frame 5 of the towing vehicle turns • in a curve> it turns the beam II to the side, whereby the beam 13 also turns and turns the body (7) of the semi-trailer so that the semi-trailer closely follows the tracks of the towing vehicle and does not straighten.

The invention is limited to the embodiment shown in the description and in the description, but can be mummified within the scope of the appended claim. The invention does not necessarily relate to this semi-trailer, as shown in the provisions, but can also be applied to other vehicles.

Claims (1)

A control system for a semi-trailer of a crawler SUV, forestry tractor or similar off-road vehicle with a goods transport space with banks (9), where part of the load is on the semi-trailer and part on the actual towing vehicle, and the semi-trailer is steered a beam (11, 13), the front beam (11) of the beam (11, 13) being fixed to the rear frame (5) of the vehicle by a horizontal transverse pin bearing (10) and a towbar (12) to the rear beam (13) of the beam integral with the semi-trailer body (7), the beam row (11, 13) guiding the semi-trailer towing vehicle along the tracks, the bending rigid upper frame beam (1) to which the banks (9) are attached pivotally mounted around the first vertical axis (2) and the second drawbar (3) pivoting about the vertical axis (6) i to the frame (7) of a semi-trailer, the drawbar being fixed by a transverse pin bearing (4) to the rear frame (5) of the vehicle, characterized in that the upper frame beam (1) is provided with a bearing in the region between the first and second vertical axles (2 and 6) ( 8), which allows the banks (9) attached to the upper frame beam to rotate relative to each other. 4 79676 Styrsystem förtt bandterrängfordons, en skogstraktors eller ternand tergordfordons pähängsvagn, omfattande ett Bankar (9) försett godstransportutrymme, i vilket en children's child to be used as a detached person and to be used as a detached carriage en building stock (1) and in the lower part of the frame (11, 13), Medan left (11, 13) (11) in the case of a rotary frame (5) genome and genome (10) and genome en drag cracks (12) with left hand rails (13), with other handles on the main ram (7), colors left hand rails (11, 13) , vid vilken bankarna (9) är fästade, lagrats svängbart account ett dragbord (3) omkring en första verti-kalaxel (2) och svängbart account pähängsvagnens ram (7) omkring en andra vertikalaxel (6), Medan dragbordet genom ett tvärgäende tapplager (4), kätats vid fordonets bakre ram (5), kännne -tecknat av att den Övre rambalken (1) försetts med ett i omrädet mellan den första och den denra vertikalaxeln (2 och 6) beläget lager (8), som tilleter de vid Övre rambalken fästade bankarna (9) att vridas i förhällande account varandra. I: