A DEVICE AT CRANE STAND MOUNTED AT THE REARMOST END OF A LIGHT CROSS-COUNTRY VEHICLE

Abstract: Device at rear mounted crane stand for a light cross-country vehicle, which comprises a frame (1) containing at least two upper (2) and two lower stays (3), which with each one end are attached to on the vehicle arranged fixed details (4, 5), whereby the attachment points for the upper and lower stays are symmetrically arranged in pairs around the longitudinal axis of the vehicle, and where the opposite ends of the stays are fixed in a plate (6), which supports a standing guide tube (7) for a crane post (8) and that said stays (2, 3) extend from its attachment points at the vehicle obliquely backwards, so that the plate is situated behind the rear rim of the vehicle, so that from the frontal attachment points of the upper stays (2) extend two at the rear angled arms (9), which above the center of said first guide tube (7) supports a second, upper guide tube (10) for said crane post, and that in connection to said guide tube is provided at least two support legs (11, 12, 22; 18, 19) arranged to be individually adjustable against the ground.

Description: A DEVICE AT CRANE STAND MOUNTED AT THE REARMOST END OF A LIGHT CROSS-COUNTRY VEHICLE . Background of the invention In the last years small light cross- country vehicles have come into the market, the vehicles being in principle four wheeled motor bikes adapted for cross-country driving, gear change and wheel equipment. Such light cross-country ve- hides have large accessibility on forest roads and off roads and thus can be used for a number of different tasks within forestry, agriculture, gardening and the like. This type of vehicle has as standard a rear tow hook placed in level with the rear axle. Cross-country vehicles of this kind are however not in the same way prepared to be equipped with a hoisting gear in the form of a crane, which is however desireable among Others in order to easily be able to load and unload heavier objects on a trailer coupled to the tow hook. The object of the invention and most important features The object of the present invention is to provide an attach¬ ment device for a crane of the type on a cross-country vehicle mentioned by way of inroduction, which constitutes a simple, reliable and non- expensive complement to a cross-country vehicle of this kind and this has been achie¬ ved by the features stated in patent claim 1. Description of drawings In the following the invention will be described more clo¬ sely with reference to the appended drawings showing em¬ bodiments of the invention. Fig. 1 shows diagrammatic from the side a crane stand accor¬ ding to the invention intended for a cross-country vehicle and provided with a crane therein, and Fig. 2 is a view straight from the rear of the crane stand with a crane and shown in a slightly larger scale. Fig. 3 shows in a view corresponding to Fig. 2 a modified design of a device according to the invention. Description of embodiments Fig. 1 and Fig. 2 show from the side and from the rear respectively a device at a rear mounted crane stand for a light cross-country vehicle whereby the cross-country ve¬ hicle only is shown in Fig. 1 and in this only as fragmenta¬ ry mounting details 4,5. The device comprises a frame 1, which in the shown embodiment contains two upper 2 and two lower stays 3, which with each end is attached to the fixed details 4,5 provided on the vehicle, whereby the attaching points for the upper and the lower stays respectively are symmetrically arranged about the longitudinal axis of the vehicle, and the opposite ends of the stays are fixed in a plate 6, which supports a standing guide tube 7 for a crane post 8. The stays 2, 3 extend from their mounting points at the vehicle inclined to the rear, so that said plate 6 will be situated behind the rear rim of the vehicle. Two at the rear angled arms 9 extend from the mounting points of the upper stays 2, which at the centre above the first guide tube 7 support a second upper guide tube 10 for the crane post, which thus accurately will be guided by the two guide tubes. In the space in front of the guide tubes 7, 10 are arranged guides 13,14 for two in withdrawn position lockable support legs 11, 12, whereby the support leg guides 13, 14 are arranged to be inclined in opposite directions symmetri¬ cally around a connection line between the guide tubes 7,10 and to cross each others directions in a point on the con¬ nection line between the guide tubes, whereupon said in- clination is such that the two guides 13,14 form a mutual angle exeeding 90°, that is every support leg forms an angle with the vertical line between the guide tubes 7, 10 which exceeds 45°, whereby the support legs when they are lowered towards the ground will take inclination angles versus the ground less than 45°, which means that they become self lock¬ ing against displacement caused by the weight of the machine and by loads, which are supported by a crane post 8' with lifting arm 15 placed in said guide tube, and since the support legs thus are adjustable independently of each other they will individually adapt to the basis and give a support adapted to this. In order to further improve the ability of the crane stand to distribute the load when loaded as advan¬ tageously as possible in relation to the traction vehicle, there can be provided a further slidable support leg 22 in a guide 21 in the same way as the support legs 11 and 12, said leg being directed obliquely at the rear, and which forms an angle slightly exceeding 45° with the vertical line trough the both guide tubes 7 and 10, whereby this further support leg in a downfolded position towards the basis likewise will be selflocking, by forming an angle less than 45° against the basis. Further there is a tow hook 16 connected to the plate 6, which hook 16 by a further forward directed stay 1 ~~ is coupled to the regular attachment for a tow hook. Since the regular attachment for the tow hook is situated relatively far ahead in the rear part of the cross-country vehicle, and at least in the front of the crane stand, the regular tow hook could not be used in the intended way, when the crane stand with support leg was coupled to the vehicle. By moving the tow hook to the region for the plate, the tow hook will be available and a trailer coupled to this will not be obstructed in its turning by members situated at the rear. In Fig. 3 is shown a view corresponding to that of Fig. 2 of a modified design of the device according to the invention whereby the device instead of the self locking support legs which are displaceable in slides, is equipped with hinged legs 18, 19, which can be folded down individually by means of hydraulic pistons 20 into contact with the basis and be folded up respectively. The invention is not limited to the embodiments shown in the drawings in connection with the specification but modifica¬ tions are possible within the scope of the following patent claims.

Claims: PATENT CLAIMS 1. Device at rear mounted crane stand for a light cross¬ country vehicle, c h a r a c t e r i z e d t h e r e i n, that the device comprises a frame (1) containing at least two upper (2) and two lower stays (3), which with iach one end are attached to on the vehicle arranged fixed details (4,5), whereby the attachment points for the upper and lower stages in pairs are symmetrically arranged around the longi¬ tudinal axis of the vehicle, and where the opposite ends of the stays are fixed in a plate (6), which supports a stan¬ ding guide tube (7) for a crane post (8) and that said stays (2,3) extend from its attachment points at the vehicle obliquely backwards, so that the plate is situated behind the rear rim of the vehicle, so that from the frontal at¬ tachment points of the upper stays (2) extend two at the rear angled arms (9), which above the center of said first guide tube (7) supports a second, upper guide tube (10) for said crane post, and that in connection to said guide tube is provided at least two support legs (11,12,22;18,19) arranged to be individually adjustable against the ground. 2. Device according to patent claim 1, c h a r a c t e r i z e d t h e r e i n, that the support legs (11,12,22) are telescopically dis- placeable, and in withdrawn position lockable in at least partly in front of said guide tube (7,10) arranged guides (13, 14, 21), whereby said support leg guides (13, 14) are arranged to be inclined in opposite directions arond a connection line between said guide tube and to cross each others directions in a point in connection to said connec¬ tion line in front of and between said guide, whereupon said inclinations are such that every guide (13, 14, 21) forms an angle towards a vertical line between the two guide tubes (7,10) slightly exceeding 45°, whereby the support legs (11,12,22) are self locking versus displacement in down folded position towards the basis, said displacement being caused by the weight of the machine and by loads, which are supported by a crane post (8) with a lifting arm (15) placed in said guide tube (7,10). 3. Device according to patent claim 1, c h a r a c t e r i z e d t h e r e i n, that the support legs (18,19) are connected by means of hinges to the frame of the device, and by means of hydraulic pistons (20) are up and down foldable between lift position and drive position. 4. Device according to one of preceeding patent claims, c h a r a c t e r i z e d t h e r e i n, that in connection to the plate (6) is provided a tow hook (16). 5. Device according to one of preceeding patent claims, c h a r a c t e r i z e d t h e r e i n, that the frame (1) with support legs (11,12,22;18,19) and crane stand (7,19) and tow hook (16) respectively constitu¬ te an integrated unit, which is easily connectable to a cross-country vehicle.

Inventors: EKMAN UNO, EKMAN, UNO
Applicants: EKMAN UNO, EKMAN, UNO
Application year: 1990
Main classification: B66C23
IPC codes: B60P1, B60P3, B66C23